MAXIM MAX13080E

19-3590; Rev 1; 4/05
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
___________________________________ 特性
MAX13080E – MAX13089E是+5.0V供电、具有±15kV ESD
保护的RS-485/RS-422收发器，包含一路驱动器和一路接
收器。这些器件具有失效保护电路，当接收器输入开路
或短路时，确保接收器输出逻辑高电平。如果挂接在终
端匹配总线上的所有发送器都禁用(高阻)，接收器将输出
逻辑高电平。MAX13080E –MAX13089E具有热插拔功能，
在上电或热插入时可以消除总线上的故障瞬变信号。
♦ +5.0V工作电压
MAX13080E/MAX13081E/MAX13082E具有低摆率驱动器，
能够减小EMI和由于不恰当的电缆端接所引起的反射，实现
高达250kbps的无差错数据传输；MAX13083E/MAX13084E/
MAX13085E具有限摆率驱动器，可实现高达500kbps的传
输速率；MAX13086E/MAX13087E/MAX13088E驱动器的摆
率不受限制，可实现高达16Mbps的传输速率；MAX13089E的
摆率可以由引脚选择，以适应250kbps、500kbps和16Mbps的
传输速率。
MAX13082E/MAX13085E/MAX13088E用于半双工通信；
MAX13080E/MAX13081E/MAX13083E/MAX13084E/
MAX13086E/MAX13087E 用于全双工通信； MAX13089E
可以设置为半双工或全双工通信，并具有独立的、可由
引脚设置的接收器与发送器输出相位。
空载或驱动器禁用情况下，MAX13080E – MAX13089E收发
器吸取 1.2mA 电源电流。所有器件的接收器具有 1/8 单位
负载输入阻抗，总线上可以挂接多达256个收发器。
MAX13080E/MAX13083E/MAX13086E/MAX13089E采用14
引脚 PDIP 和 14 引脚 SO 封装，MAX13081E/MAX13082E/
MAX13084E/MAX13085E/MAX13087E/MAX13088E采用8引
脚 PDIP 和 8 引脚 SO 封装。这些器件可以提供商用级、扩
展工业级或汽车级温度范围。
♦ 为RS-485/RS-422 I/O引脚提供增强型ESD保护
±15kV人体模式
♦ 真正的失效保护接收器兼容于EIA/TIA-485
♦ DE与RE采用热插拔输入结构
♦ 强大的摆率控制功能有助于实现无差错数据传输
(MAX13080E – MAX13085E/MAX13089E)
♦ 低电流关断模式
(MAX13081E/MAX13084E/MAX13087E除外)
♦ 可通过引脚选择全双工/半双工模式(MAX13089E)
♦ 为纠正双绞线反接提供相位控制(MAX13089E)
♦ 总线上允许挂接多达256个收发器
♦ 提供工业标准的8引脚SO封装
________________________________定购信息
PINPACKAGE
PKG
CODE
0°C to +70°C
14 PDIP
P14-3
0°C to +70°C
14 SO
S14-2
P14-3
PART
TEMP RANGE
MAX13080ECPD
MAX13080ECSD
MAX13080EEPD
-40°C to +85°C
14 PDIP
MAX13080EESD
-40°C to +85°C
14 SO
S14-2
MAX13080EAPD
-40°C to +125°C
14 PDIP
P14-3
MAX13080EASD
-40°C to +125°C
14 SO
S14-2
___________________________________ 应用
三表
定购信息(续)在数据资料的最后给出。
照明系统
工业控制
选型指南、引脚配置和典型工作电路在数据资料的最后给出。
电信
安防系统
仪器仪表
Profibus
________________________________________________________________ Maxim Integrated Products
1
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MAX13080E–MAX13089E
___________________________________ 概述
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
ABSOLUTE MAXIMUM RATINGS
(All Voltages Referenced to GND)
Supply Voltage (VCC).............................................................+6V
Control Input Voltage (RE, DE, SLR,
H/F, TXP, RXP)......................................................-0.3V to +6V
Driver Input Voltage (DI)...........................................-0.3V to +6V
Driver Output Voltage (Z, Y, A, B) .............................-8V to +13V
Receiver Input Voltage (A, B)....................................-8V to +13V
Receiver Input Voltage
Full Duplex (A, B) ..................................................-8V to +13V
Receiver Output Voltage (RO)....................-0.3V to (VCC + 0.3V)
Driver Output Current .....................................................±250mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C) .................471mW
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW
14-Pin SO (derate 8.33mW/°C above +70°C) ...............667mW
14-Pin Plastic DIP (derate 10.0mW/°C above +70°C) ...800mW
Operating Temperature Ranges
MAX1308_EC_ _ .................................................0°C to +75°C
MAX1308_EE_ _ ..............................................-40°C to +85°C
MAX1308_EA_ _ ............................................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
DRIVER
VCC Supply-Voltage Range
Differential Driver Output
VCC
VOD
4.5
5.5
RL = 100Ω (RS-422), Figure 1
3
VCC
RL = 54Ω (RS-485), Figure 1
2
VCC
VCC
0.2
V
3
V
0.2
V
0.8
V
Change in Magnitude of
Differential Output Voltage
ΔVOD
RL = 100Ω or 54Ω, Figure 1 (Note 2)
Driver Common-Mode Output
Voltage
VOC
RL = 100Ω or 54Ω, Figure 1
Change in Magnitude of
Common-Mode Voltage
ΔVOC
RL = 100Ω or 54Ω, Figure 1 (Note 2)
Input-High Voltage
VIH
DE, DI, RE, TXP, RXP, H/F
Input-Low Voltage
VIL
DE, DI, RE, TXP, RXP, H/F
VHYS
DE, DI, RE, TXP, RXP, H/F
Input Hysteresis
Input Current
IIN1
Input Impedance First Transition
Input Current
VCC / 2
3
V
100
DE, DI, RE
DE
IIN2
TXP, RXP, H/F internal pulldown
±1
µA
10
kΩ
10
40
µA
VCC - 0.4
SRL Input-Middle Voltage
VCC x 0.3
SRL Input-Low Voltage
Output Leakage (Y and Z)
Full Duplex
2
mV
1
SRL Input-High Voltage
V
VCC x 0.7
0.4
SRL = VCC
SRL Input Current
75
SRL = GND
IO
V
No load
DE = GND,
VCC = GND or VCC
-75
VIN = +12V
VIN = -7V
125
-100
_______________________________________________________________________________________
V
V
µA
µA
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.) (Note 1)
PARAMETER
Driver Short-Circuit Output
Current
SYMBOL
IOSD
Driver Short-Circuit Foldback
Output Current
IOSDF
Thermal-Shutdown Threshold
TTS
Thermal-Shutdown Hysteresis
TTSH
CONDITIONS
MIN
TYP
MAX
0 ≤ VOUT ≤ +12V (Note 3)
40
250
-7V ≤ VOUT ≤ VCC (Note 3)
-250
-40
0 ≤ VOUT ≤ +12V, +85°C ≤ TA ≤ +125°C
(Note 3)
40
270
-7V ≤ VOUT ≤ VCC, +85°C ≤ TA ≤ +125°C
(Note 3)
-270
-40
(VCC - 1V) ≤ VOUT ≤ +12V (Note 3)
20
-7V ≤ VOUT ≤ +1V (Note 3)
-20
mA
mA
°C
175
°C
15
VIN = +12V
UNITS
125
IA, B
DE = GND,
VCC = GND or VCC
Receiver Differential Threshold
Voltage
VTH
-7V ≤ VCM ≤ +12V
Receiver Input Hysteresis
ΔVTH
V A + VB = 0
RO Output-High Voltage
VOH
IO = -1mA
RO Output-Low Voltage
VOL
IO = 1mA
0.4
V
Three-State Output Current at
Receiver
IOZR
0 ≤ VO ≤ VCC
±1
µA
Receiver Input Resistance
RIN
-7V ≤ VCM ≤ +12V
Receiver Output Short-Circuit
Current
IOSR
0V ≤ VRO ≤ VCC
Input Current (A and B)
VIN = -7V
-100
µA
RECEIVER
-200
-125
-50
15
mV
mV
VCC - 0.6
V
96
kΩ
±110
mA
SUPPLY CURRENT
Supply Current
ICC
Supply Current in Shutdown
Mode
ISHDN
No load, RE = 0, DE = VCC
1.2
1.8
No load, RE = VCC, DE = VCC
1.2
1.8
No load, RE = 0, DE = 0
1.2
1.8
RE = VCC, DE = GND
2.8
10
Human Body Model
±15
kV
Contact Discharge
IEC 61000-4-2
±6
kV
mA
µA
ESD PROTECTION
ESD Protection for Y, Z, A, and B
_______________________________________________________________________________________
3
MAX13080E–MAX13089E
DC ELECTRICAL CHARACTERISTICS (continued)
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
DRIVER SWITCHING CHARACTERISTICS
MAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Driver Propagation Delay
Driver Differential Output Rise or
Fall Time
Differential Driver Output Skew
|tDPLH - tDPHL|
SYMBOL
tDPLH
tDPHL
CONDITIONS
CL= 50pF, RL= 54Ω, Figures 2 and 3
tR , tF
CL= 50pF, RL= 54Ω, Figures 2 and 3
tDSKEW
CL= 50pF, RL= 54Ω, Figures 2 and 3
Maximum Data Rate
MIN
TYP
MAX
UNITS
350
1800
350
1800
400
1900
ns
250
ns
250
ns
kbps
Driver Enable to Output High
tDZH
Figure 4
2500
ns
Driver Enable to Output Low
tDZL
Figure 5
2500
ns
Driver Disable Time from Low
tDLZ
Figure 5
100
ns
Driver Disable Time from High
tDHZ
Figure 4
100
ns
Driver Enable from Shutdown to
Output High
tDZH(SHDN) Figure 4
5500
ns
Driver Enable from Shutdown to
Output Low
tDZL(SHDN) Figure 5
5500
ns
700
ns
Time to Shutdown
tSHDN
50
340
RECEIVER SWITCHING CHARACTERISTICS
MAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Receiver Propagation Delay
Receiver Output Skew
|tRPLH - tRPHL|
SYMBOL
tRPLH
tRPHL
tRSKEW
CONDITIONS
MIN
TYP
200
CL = 15pF, Figures 6 and 7
200
CL = 15pF, Figures 6 and 7
Maximum Data Rate
MAX
30
250
UNITS
ns
ns
kbps
Receiver Enable to Output Low
tRZL
Figure 8
50
ns
Receiver Enable to Output High
tRZH
Figure 8
50
ns
Receiver Disable Time from Low
tRLZ
Figure 8
50
ns
Receiver Disable Time from High
tRHZ
Figure 8
50
ns
Receiver Enable from Shutdown
to Output High
tRZH(SHDN) Figure 8
5500
ns
Receiver Enable from Shutdown
to Output Low
tRZL(SHDN) Figure 8
5500
ns
700
ns
Time to Shutdown
4
tSHDN
50
340
_______________________________________________________________________________________
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Driver Propagation Delay
Driver Differential Output Rise or
Fall Time
Differential Driver Output Skew
|tDPLH - tDPHL|
SYMBOL
tDPLH
tDPHL
CONDITIONS
CL = 50pF, RL = 54Ω, Figures 2 and 3
tR , tF
CL = 50pF, RL = 54Ω, Figures 2 and 3
tDSKEW
CL = 50pF, RL = 54Ω, Figures 2 and 3
Maximum Data Rate
MIN
TYP
MAX
UNITS
200
1000
200
1000
250
900
ns
140
ns
500
ns
kbps
Driver Enable to Output High
tDZH
Figure 4
2500
ns
Driver Enable to Output Low
tDZL
Figure 5
2500
ns
Driver Disable Time from Low
tDLZ
Figure 5
100
ns
Driver Disable Time from High
tDHZ
Figure 4
100
ns
Driver Enable from Shutdown to
Output High
tDZH(SHDN) Figure 4
5500
ns
Driver Enable from Shutdown to
Output Low
tDZL(SHDN) Figure 5
5500
ns
700
ns
Time to Shutdown
tSHDN
50
340
RECEIVER SWITCHING CHARACTERISTICS
MAX13083E/MAX13084E/MAX13085E/MAX13089E WITH SRL = VCC (500kbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Receiver Propagation Delay
Receiver Output Skew
|tRPLH - tRPHL|
SYMBOL
tRPLH
tRPHL
tRSKEW
CONDITIONS
MIN
TYP
200
CL = 15pF, Figures 6 and 7
200
CL = 15pF, Figures 6 and 7
Maximum Data Rate
MAX
30
500
UNITS
ns
ns
kbps
Receiver Enable to Output Low
tRZL
Figure 8
50
ns
Receiver Enable to Output High
tRZH
Figure 8
50
ns
Receiver Disable Time from Low
tRLZ
Figure 8
50
ns
Receiver Disable Time from High
tRHZ
Figure 8
50
ns
Receiver Enable from Shutdown
to Output High
tRZH(SHDN) Figure 8
5500
ns
Receiver Enable from Shutdown
to Output Low
tRZL(SHDN) Figure 8
5500
ns
700
ns
Time to Shutdown
tSHDN
50
340
_______________________________________________________________________________________
5
MAX13080E–MAX13089E
DRIVER SWITCHING CHARACTERISTICS
MAX13083E/MAX13084E/MAX13085E/MAX13089E WITH SRL = VCC (500kbps)
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
DRIVER SWITCHING CHARACTERISTICS
MAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Driver Propagation Delay
Driver Differential Output Rise or
Fall Time
Differential Driver Output Skew
|tDPLH - tDPHL|
SYMBOL
tDPLH
tDPHL
CONDITIONS
MIN
TYP
MAX
50
CL = 50pF, RL= 54Ω, Figures 2 and 3
50
UNITS
ns
tR , tF
CL = 50pF, RL= 54Ω, Figures 2 and 3
15
ns
tDSKEW
CL = 50pF, RL= 54Ω, Figures 2 and 3
8
ns
Maximum Data Rate
16
Mbps
Driver Enable to Output High
tDZH
Figure 4
150
ns
Driver Enable to Output Low
tDZL
Figure 5
150
ns
Driver Disable Time from Low
tDLZ
Figure 5
100
ns
Driver Disable Time from High
tDHZ
Figure 4
100
ns
Driver Enable from Shutdown to
Output High
tDZH(SHDN) Figure 4
2200
ns
Driver Enable from Shutdown to
Output Low
tDZL(SHDN) Figure 5
2200
ns
700
ns
Time to Shutdown
tSHDN
50
340
RECEIVER SWITCHING CHARACTERISTICS
MAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Receiver Propagation Delay
Receiver Output Skew
|tRPLH - tRPHL|
SYMBOL
tRPLH
tRPHL
tRSKEW
CONDITIONS
MIN
CL = 15pF, Figures 6 and 7
TYP
MAX
50
80
50
80
CL = 15pF, Figures 6 and 7
Maximum Data Rate
13
16
UNITS
ns
ns
Mbps
Receiver Enable to Output Low
tRZL
Figure 8
50
ns
Receiver Enable to Output High
tRZH
Figure 8
50
ns
Receiver Disable Time from Low
tRLZ
Figure 8
50
ns
Receiver Disable Time from High
tRHZ
Figure 8
50
ns
Receiver Enable from Shutdown
to Output High
tRZH(SHDN) Figure 8
2200
ns
Receiver Enable from Shutdown
to Output Low
tRZL(SHDN) Figure 8
2200
ns
700
ns
Time to Shutdown
tSHDN
50
340
Note 1: All currents into the device are positive. All currents out of the device are negative. All voltages are referred to device ground,
unless otherwise noted.
Note 2: ΔVOD and ΔVOC are the changes in VOD and VOC, respectively, when the DI input changes state.
Note 3: The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback output
current applies during current limiting to allow a recovery from bus contention.
6
_______________________________________________________________________________________
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
1.30
1.20
DE = VCC
1.10
DE = 0
40
30
20
60
1.00
10
0.90
20
1
2
3
4
0
5
1
2
3
4
5
OUTPUT LOW VOLTAGE (V)
RECEIVER OUTPUT-HIGH VOLTAGE
vs. TEMPERATURE
RECEIVER OUTPUT-LOW VOLTAGE
vs. TEMPERATURE
DRIVER DIFFERENTIAL OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
4.6
4.4
0.7
0.6
0.5
0.4
0.3
0.2
4.2
0.1
4.0
0
140
120
100
80
60
40
20
0
-40 -25 -10
-40 -25 -10 5 20 35 50 65 80 95 110 125
160
MAX13080E-89E toc06
IO = 1mA
DIFFERENTIAL OUTPUT CURRENT (mA)
4.8
MAX13080E-89E toc05
5.0
0.8
OUTPUT LOW VOLTAGE (V)
5.2
MAX13080E-89E toc04
OUTPUT HIGH VOLTAGE (V)
IO = -1mA
5 20 35 50 65 80 95 110 125
0
1
2
3
4
5
TEMPERATURE (°C)
DIFFERENTIAL OUTPUT VOLTAGE (V)
DRIVER DIFFERENTIAL OUTPUT
VOLTAGE vs. TEMPERATURE
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-HIGH VOLTAGE
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-LOW VOLTAGE
4.0
3.6
3.2
2.8
2.4
2.0
180
160
140
120
100
80
60
5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
180
160
140
120
100
80
60
40
40
20
20
0
0
-40 -25 -10
200
MAX13080E-89E toc09
4.4
200
OUTPUT CURRENT (mA)
RL = 54Ω
OUTPUT CURRENT (mA)
4.8
MAX13080E-89E toc07
TEMPERATURE (°C)
MAX13080E-89E toc08
OUTPUT HIGH VOLTAGE (V)
30
TEMPERATURE (°C)
5.4
DIFFERENTIAL OUTPUT VOLTAGE (V)
40
0
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
50
10
0
0.80
MAX13080E-89E toc03
50
70
OUTPUT CURRENT (mA)
1.40
MAX13080E-89E toc02
SUPPLY CURRENT (mA)
1.50
60
OUTPUT CURRENT (mA)
NO LOAD
MAX13080E-89E toc01
1.60
OUTPUT CURRENT
vs. RECEIVER OUTPUT-LOW VOLTAGE
OUTPUT CURRENT
vs. RECEIVER OUTPUT-HIGH VOLTAGE
SUPPLY CURRENT vs. TEMPERATURE
-7 -6 -5 -4 -3 -2 -1 0
1
2
OUTPUT HIGH VOLTAGE (V)
3
4
5
0
2
4
6
8
10
12
OUTPUT-LOW VOLTAGE (V)
____________________________________________________________________________________________
7
MAX13080E–MAX13089E
__________________________________________________________________________典型工作特性
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
___________________________________________________________________典型工作特性(续)
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
6
5
4
3
2
tDPHL
1000
tDPLH
900
800
700
550
tDPHL
500
MAX13080E-89E toc12
7
1100
600
DRIVER PROPAGATION DELAY (ns)
8
1200
MAX13080E-89E toc11
SHUTDOWN CURRENT (μA)
9
DRIVER PROPAGATION DELAY (ns)
MAX13080E-89E toc10
10
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (500kbps)
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (250kbps)
SHUTDOWN CURRENT
vs. TEMPERATURE
tDPLH
450
400
350
1
0
600
-40 -25 -10
300
-40 -25 -10
5 20 35 50 65 80 95 110 125
5 20 35 50 65 80 95 110 125
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (16Mbps)
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE (250kpbs AND 500kbps)
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE (16Mbps)
50
40
30
tDPHL
20
10
140
120
100
tDPLH
80
60
tDPHL
40
20
tDPLH
0
0
-40 -25 -10
5 20 35 50 65 80 95 110 125
180
MAX13080E-89E toc15
160
RECEIVER PROPAGATION DELAY (ns)
60
MAX13080E-89E toc14
70
180
RECEIVER PROPAGATION DELAY (ns)
MAX13080E-89E toc13
80
DRIVER PROPAGATION DELAY (ns)
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
160
140
120
100
80
tDPLH
60
40
tDPHL
20
0
-40 -25 -10
TEMPERATURE (°C)
5 20 35 50 65 80 95 110 125
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
TEMPERATURE (°C)
RECEIVER PROPAGATION DELAY
(250kbps AND 500kbps)
DRIVER PROPAGATION DELAY (250kbps)
MAX13080E-89E toc16
MAX13080E-89E toc17
RL = 100Ω
RL = 100Ω
DI
2V/div
VA - V B
5V/div
RO
2V/div
VY - V Z
5V/div
2μs/div
8
200ns/div
_______________________________________________________________________________________
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
DRIVER PROPAGATION DELAY (16Mbps)
DRIVER PROPAGATION DELAY (500kbps)
MAX13080E-89E toc18
MAX13080E-89E toc19
RL = 100Ω
RL = 100Ω
RECEIVER PROPAGATION DELAY (16Mbps)
MAX13080E-89E toc20
RL = 100Ω
VB
2V/div
DI
2V/div
DI
2V/div
VA
2V/div
VZ
2V/div
VY - V Z
5V/div
RO
2V/div
VY
2V/div
10ns/div
400ns/div
40ns/div
________________________________________________________________________ 测试电路与波形
VCC
Y
DI
VCC/2
0
RL/2
VOD
tDPLH
tDPHL
1/2 VO
Z
RL/2
VO
VOC
Y
1/2 VO
Z
VO
VDIFF 0
-VO
图1. 驱动器DC测试负载
VDIFF = V (Y) - V (Z)
10%
90%
90%
10%
tF
tR
tSKEW = | tDPLH - tDPHL |
VCC
图3. 驱动器传输延时
DE
Y
DI
VOD
RL
CL
Z
图2. 驱动器时序测试电路
_______________________________________________________________________________________
9
MAX13080E–MAX13089E
___________________________________________________________________典型工作特性(续)
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
_________________________________________________________________测试电路与波形(续)
S1
D
0 OR VCC
OUT
CL
50pF
GENERATOR
RL = 500Ω
50Ω
VCC
DE
VCC / 2
tDZH, tDZH(SHDN)
0
0.25V
OUT
VOH
VOM = (0 + VOH) / 2
0
tDHZ
图4. 驱动器使能和禁用时序(tDHZ、tDZH、tDZH(SHDN))
VCC
RL = 500Ω
S1
0 OR VCC
D
OUT
CL
50pF
GENERATOR
50Ω
VCC
DE
VCC / 2
tDZL, tDZL(SHDN)
0
tDLZ
VCC
VOM = (VOL + VCC) / 2
OUT
VOL
图5. 驱动器使能和禁用时序(tDZL、tDLZ、tDLZ(SHDN))
10
______________________________________________________________________________________
0.25V
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
B
VID
ATE
R
RECEIVER
OUTPUT
A
+1V
B
-1V
tRPLH
VOH
A
tRPHL
VCC/2
VOL
RO
THE RISE TIME AND FALL TIME OF INPUTS A AND B < 4ns
图6. 接收器传输延时测试电路
图7. 接收器传输延时
S1
+1.5V
S3
VCC
1kΩ
-1.5V
VID
R
CL
15pF
GENERATOR
S2
50Ω
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
VCC
VCC
VCC/2
RE
RE
0
0
tRZH, tRZH(SHDN)
tRZL, tRZL(SHDN)
VOH
RO
VCC
VOH / 2
(VOL + VCC) / 2
RO
0
S1 OPEN
S2 CLOSED
S3 = +1.5V
VOL
S1 CLOSED
S2 OPEN
S3 = -1.5V
VCC
VCC/2
VCC/2
RE
tRHZ
VCC
0
RE
0
tRLZ
VCC
VOH
0.25V
RO
0
RO
0.25V
VOL
图8. 接收器使能和禁用时序
______________________________________________________________________________________
11
MAX13080E–MAX13089E
_________________________________________________________________测试电路与波形(续)
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
___________________________________________________________________________引脚说明
引脚
MAX13080E MAX13081E MAX13082E
MAX13083E MAX13084E MAX13085E
MAX13086E MAX13087E MAX13088E
FULL-DUPLEX
全双工
器件
DEVICES
名称
HALF半双工
DUPLEX
器件
DEVICES
FULL全双工
DUPLEX
模式
MODE
HALF半双工
DUPLEX
模式
MODE
功能
1, 8, 13
—
—
—
—
N.C.
无连接。内部未连接，可连接至GND。
—
—
—
1
1
H/F
半/全双工选择输入。连接H/F至VCC 选择半双工模式；连
接H/F至GND或悬空选择全双工模式。
2
2
1
2
2
RO
接收器输出。RE为低电平时，若(A - B) ≥ -50mV，RO输
出高电平；若(A - B) ≤ -200mV，RO输出低电平。
RE
接收器输出使能。RE接低电平时RO输出有效；RE接高电
平时RO为高阻态。RE接高电平且DE接低电平时，器件进
入低功耗关断模式。RE采用热插拔输入结构(详细信息请
参考热插拔功能(MAX13081E/MAX13084E/MAX13087E除外)
部分)。
3
12
MAX13089E
—
2
3
3
4
—
3
4
4
DE
驱动器输出使能。DE接高电平时驱动器输出有效。DE接
低电平时输出为高阻态。RE接高电平且DE接低电平时，
器件进入低功耗关断模式。DE采用热插拔输入结构(详细
信息请参考热插拔功能(MAX13081E/MAX13084E/MAX13087E
除外)部分)。
5
3
4
5
5
DI
驱动器输入。DE为高电平时，DI上的低电平强制同相输出
为低电平，反相输出为高电平。同样，DI上的高电平将强
制同相输出为高电平，反相输出为低电平。
—
—
—
6
6
SRL
摆率限制选择输入。将SRL接地选择16Mbps通信速率；
将SRL接至VCC 选择500kbps通信速率。SRL悬空时选择
250kbps通信速率。
6, 7
4
5
7
7
GND
地。
—
—
—
8
8
TXP
发送器相位。将TXP接地或者悬空时，选择标准的发送器
相位/极性。连接TXP至VCC 时，则翻转发送器相位/极性。
9
5
—
9
—
Y
驱动器同相输出。
—
—
—
—
9
Y
驱动器同相输出和接收器同相输入。
*
10
6
—
10
—
Z
驱动器反相输出。
—
—
—
—
10
Z
驱动器反相输出和接收器反相输入。
*
11
7
—
11
—
B
—
—
—
—
11
B
接收器反相输入。
接收器输入电阻。
*
—
—
7
—
—
B
接收器反相输入和驱动器反相输出。
______________________________________________________________________________________
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
引脚
MAX13080E MAX13081E MAX13082E
MAX13083E MAX13084E MAX13085E
MAX13086E MAX13087E MAX13088E
全双工
器件
MAX13089E
名称
半双工
器件
全双工
模式
半双工
模式
功能
12
8
—
12
—
A
接收器同相输入。
—
—
—
—
12
A
接收器输入电阻。
*
—
—
6
—
—
A
接收器同相输入和驱动器同相输出。
—
—
—
13
13
RXP
接收器相位。对于标准的发送器相位/极性，连接RXP至
GND或者RXP保持悬空。连接RXP至VCC 时，则翻转接收
器相位/极性。
14
1
8
14
14
VCC
正电源，VCC = +5.0V ±10%。采用一个0.1µF电容旁路VCC
至GND。
*仅适用于MAX13089E。在半双工模式下，驱动器输出同时作为接收器输入。全双工接收器输入(A和B)仍具有1/8单位负载(96kΩ)，虽然
并未和接收器相连。
_________________________________________________________________________________功能表
MAX13080E/MAX13083E/MAX13086E
MAX13081E/MAX13084E/MAX13086E/
MAX13087E
TRANSMITTING
INPUTS
OUTPUTS
TRANSMITTING
RE
DE
DI
Z
Y
INPUT
X
1
1
0
1
DI
Z
Y
X
1
0
1
0
1
0
1
0
0
X
High-Z
High-Z
0
1
0
1
0
X
OUTPUTS
Shutdown
RECEIVING
RECEIVING
INPUTS
OUTPUT
INPUTS
OUTPUT
A, B
RO
RE
DE
A, B
RO
≥ -50mV
1
0
X
≥ -50mV
1
≤ -200mV
0
0
X
≤ -200mV
0
Open/shorted
1
0
X
Open/
shorted
1
1
1
X
High-Z
1
0
X
Shutdown
______________________________________________________________________________________
13
MAX13080E–MAX13089E
________________________________________________________________________引脚说明(续)
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
__________________________________________________________________________功能表(续)
MAX13082E/MAX13085E/MAX13088E
RECEIVING
TRANSMITTING
INPUTS
INPUTS
OUTPUTS
OUTPUTS
RE
DE
DI
B/Z
A/Y
RE
DE
X
1
1
0
1
0
X
≥ -50mV
1
X
1
0
1
0
0
X
≤ -200mV
0
0
0
X
High-Z
High-Z
1
0
X
0
X
Open/
shorted
1
1
1
X
High-Z
1
0
X
Shutdown
Shutdown
A-B
RO
MAX13089E
TRANSMITTING
INPUTS
OUTPUTS
TXP
RE
DE
DI
Z
Y
0
X
1
1
0
1
0
X
1
0
1
0
1
X
1
1
1
0
1
X
1
0
0
1
X
0
0
X
High-Z
X
1
0
X
High-Z
Shutdown
RECEIVING
INPUTS
OUTPUTS
H/F
RXP
RE
DE
0
0
0
0
0
0
0
1
0
1
1
A, B
Y, Z
RO
X
> -50mV
X
1
X
< -200mV
X
0
0
X
> -50mV
X
0
1
0
X
< -200mV
X
1
0
0
0
X
> -50mV
1
0
0
0
X
< -200mV
0
1
1
0
0
X
> -50mV
0
1
1
0
0
X
< -200mV
1
0
0
0
X
Open/shorted
X
1
1
0
0
0
X
Open/shorted
1
0
1
0
X
Open/shorted
X
0
1
1
0
0
X
Open/shorted
0
X
X
1
1
X
X
High-Z
X
X
1
0
X
X
Shutdown
X = 无关；关断模式下，驱动器和接收器输出均为高阻态。
14
______________________________________________________________________________________
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
MAX13080E–MAX13089E系列高速RS-485/RS-422收发器
包括一路驱动器和一路接收器。这些器件具有失效保护
电路，当接收器输入短路或开路时，或当终端匹配传输
线上的所有驱动器均处于禁用状态时，可确保接收器
输出逻辑高电平(参考失效保护部分)。MAX13080E/
MAX13082E/MAX13083E/MAX13085E/MAX13086E/
MAX13088E/MAX13089E还具有热插拔功能，支持热插入
而不会产生数据传输错误(参考 热插拔功能(MAX13081E/
MAX13084E/MAX13087E 除外) 部分)。MAX13080E/
MAX13081E/MAX13082E的低摆率驱动器可降低EMI，并
减小由不恰当的端接电缆引起的反射，能够实现最大
250kbps 的无差错数据传输； MAX13083E/MAX13084E/
MAX13085E也具有摆率限制功能，能够实现最大500kbps
的传输速率；MAX13086E/MAX13087E/MAX13088E的驱
动器摆率不受限制，能够实现最大16Mbps的传输速率；
MAX13089E的摆率可通过三态驱动器的选择引脚进行选
择，以支持250kbps、500kbps和16Mbps的传输速率。
MAX13082E/MAX13085E/MAX13088E为半双工收发器；
MAX13080E/MAX13081E/MAX13083E/MAX13084E/
MAX13086E/MAX13087E为全双工收发器；MAX13089E可
通过将选择引脚(H/ F)接高电平或低电平分别选择半双工
或全双工通信模式。
所有器件均采用+5.0V单电源供电。驱动器具有输出短路
限流功能。热关断电路保护驱动器不会出现功耗过大。
进入热关断保护后，驱动器输出被置于高阻态。
接收器输入滤波
MAX13080E– MAX13085E以及工作在250kbps或500kbps模
式下的MAX13089E，其接收器除了具有输入滞回外，还
包括输入滤波功能。此滤波功能提高了上升和下降缓慢
的差分信号的噪声抑制能力。滤波器使接收器传输延时
增加25%。
失效保护
接收器输入短路或开路时，或挂接在终端匹配传输线上
的所有驱动器均处于禁用状态时，MAX13080E系列可确
保接收器输出逻辑高电平。这是通过将接收器输入门限
分别设置为-50mV和-200mV实现的。若差分接收器输入电
压(A - B)大于或等于-50mV，RO 为逻辑高电平；若电压
(A - B)小于或等于-200mV，RO为逻辑低电平。当挂接在
终端匹配总线上的所有发送器都禁用时，接收器差分输
入电压将通过终端电阻拉至0V。依据MAX13080E系列的
接收器门限，可实现具有50mV最小噪声容限的逻辑高电
平。与以往的失效保护器件不同，-50mV至-200mV门限电
压符合±200mV的EIA/TIA-485标准。
热插拔功能
(MAX13081E/MAX13084E/MAX13087E除外)
热插拔输入
把电路板插入带电或正在工作的背板时，数据总线的差
分干扰可能导致数据错误。电路板插入背板时，数据通
信处理器启动一次上电过程。在此过程中，处理器的逻
辑输出驱动器为高阻态，不能将这些器件的DE和RE输入
驱动至规定的逻辑电平。处理器的逻辑驱动器在高阻态
时可能会有高达 ±10µA 的漏电流，这会引起收发器的标
准CMOS使能输入漂移到不正确的逻辑电平。此外，电路
板寄生电容还会将 V CC 或者 GND 耦合至使能输入端。如
果不具备热插拔能力，以上因素会错误地使能收发器的
驱动器或接收器。
VCC 上升时，内部下拉电路保持DE为低电平，RE为高电
平。完成初始上电过程后，下拉电路不起作用，并复位
热插拔输入端。
热插拔输入电路
使能输入端具备热插拔能力。输入端有两个NMOS器件：
M1和M2 (图9)。当VCC 由零开始上升时，内部7µs定时器
打开 M2，设置 SR 锁存器，而锁存器又同时打开 M1。晶
体管M2可吸收1.5mA电流，M1可吸收500µA电流，通过
一个5kΩ电阻将DE下拉至GND。为防止高达100pF的外部
寄生电容将 DE 驱动至高电平，M2 设计用于将 DE 拉至禁
用状态。7µs之后，定时器关闭M2，M1继续导通，以保
持DE为低电平，并防止三态漏电流将DE驱动至高电平。
直到外部驱动源提供所需的输入电流后，才关闭M1。此
时，SR锁存器复位，M1关闭。M1关闭时，DE恢复为标
准高阻CMOS输入。只要VCC 降至1V以下，就会复位热插
拔输入电路。
对于RE，互补电路采用两个PMOS器件将RE上拉至VCC。
______________________________________________________________________________________
15
MAX13080E–MAX13089E
__________________________________详细说明
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
模式。在全双工模式下，驱动器和接收器的引脚配置与
MAX13080E一致。在半双工模式下，接收器输入在内部
通过分压电阻连接到驱动器的输出端，从而改变了驱动
器输出的功能。Y 成为同相驱动器输出和接收器输入，
Z 则成为反相驱动器输出和接收器输入。半双工模式下，
A、B引脚仍通过内部分压电阻接地，但它们在内部并没
有连接到接收器。
VCC
10μs
TIMER
SR LATCH
TIMER
±15kV ESD保护
5kΩ
DE
(HOT SWAP)
DE
100μA
500μA
M1
M2
类似于Maxim的其它相关器件，所有引脚都采用了ESD保
护结构，在操作与装配过程中出现静电放电时可对器件
提供保护。MAX13080E系列产品的驱动器输出与接收器
输入具有额外的静电保护能力。Maxim的工程师们已开发
出目前技术水平最高的电路结构，为这些引脚提供保护，
使其能够承受±15kV的ESD冲击。ESD保护结构在所有状
态下都可承受高ESD冲击，包括标准工作模式、关断和断
电模式。受到ESD冲击后，MAX13080E – MAX13089E能够
继续工作而不会闭锁或损坏。
ESD 保护可以采用不同方法进行测试。MAX13080E–
MAX13089E的发送器输出与接收器输入在以下条件下进
行了保护测试：
图9. 驱动器使能引脚(DE)简化结构
• ±15kV，人体模型。
MAX13089E编程
MAX13089E提供几种可编程工作模式。可编程发送器的
上升和下降时间，实现最大250kbps、500kbps和16Mbps的
数据速率。为选择所需的数据速率，可通过三态驱动器
驱动SRL至三种可能的状态之一：VCC、GND或悬空。对
于 250kbps 传输速率，设置三态驱动器为高阻态或使 SRL
悬空。对于500kbps传输速率，驱动SRL至高电平或连接
至VCC。对于16Mbps传输速率，驱动SRL至低电平或连接
至GND。SRL状态可在器件工作期间进行修改，而不必中
断数据通信。
双绞线有时会出现接反的情况。MAX13089E的两个引脚
可以翻转驱动器和接收器的相位，从而纠正这种错误连
接。正常工作情况下，驱动TXP和RXP至低电平、将它们
连接至地或悬空(具有内部下拉)。驱动TXP至高电平或将
其连接至VCC 来翻转驱动器相位；驱动RXP至高电平或将
其连接至VCC 来翻转接收器相位。注意，当RXP为高电平
时接收器门限值为正。
MAX13089E可工作于全双工或半双工模式。驱动H/F至低
电平、保持该引脚悬空(具有内部下拉)，或者将其连接至
GND 可实现全双工模式。驱动 H/F 至高电平实现半双工
16
• ±6kV，IEC 61000-4-2规定的接触放电方法。
ESD测试条件
ESD性能取决于多种条件。若需包括测试条件、方法和结
果在内的可靠性报告，请与Maxim联系。
人体模型
图10a所示为人体模型，对低阻放电时产生的电流波形如
图 10b 所示。该模型包括一个 100pF 电容，先充电至所需
的ESD电压，然后通过1.5kΩ电阻向被测器件放电。
IEC 61000-4-2
IEC 61000-4-2标准涵盖了成品设备的ESD测试与性能，但
它并不是专门针对集成电路。MAX13080E系列器件帮助
用户设计符合IEC 61000-4-2要求的设备，而不需要额外的
ESD保护元件。
使用人体模型与 IEC 61000-4-2 进行测试的主要区别在于
IEC 61000-4-2测试的峰值电流更高，这是由于IEC 610004-2模型具有更小的串联电阻。因此，IEC 61000-4-2测试
的ESD耐受电压通常低于使用人体模型测试的结果。图10c
所示为IEC 61000-4-2模型，图10d所示为IEC 61000-4-2 ESD
接触放电测试的电流波形。
______________________________________________________________________________________
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
CHARGE-CURRENTLIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
Cs
100pF
RD
1500Ω
RC
50MΩ TO 100MΩ
DISCHARGE
RESISTANCE
CHARGE-CURRENTLIMIT RESISTOR
DEVICE
UNDER
TEST
STORAGE
CAPACITOR
图10a. 人体ESD测试模型
HIGHVOLTAGE
DC
SOURCE
Cs
150pF
MAX13080E–MAX13089E
RC
1MΩ
RD
330Ω
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
图10c. IEC 61000-4-2 ESD测试模型
IP 100%
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
IPEAK
Ir
I
100%
90%
AMPS
36.8%
10%
0
10%
0
tRL
TIME
tDL
CURRENT WAVEFORM
tr = 0.7ns TO 1ns
t
30ns
60ns
图10b. 人体电流波形
图10d. IEC 61000-4-2 ESD产生的电流波形
机器模型
机器模型ESD测试采用200pF存储电容和零放电电阻对所
有引脚进行测试。其目的是模拟测试和装配过程中操作
设备接触I/O引脚所产生的静电冲击。当然所有引脚都需
要这种保护，而不只是RS-485输入与输出引脚。
可任意组合，或者与其它 RS-485 收发器进行组合，只要
总负载不超过32个单位负载，都可以挂接在同一总线上。
_______________________________ 应用信息
总线上挂接256个收发器
标准 RS-485 接收器的输入阻抗为 12kΩ (1 个单位负载)，
标准驱动器可最多驱动32个单位负载。MAX13080E系列
收发器的接收器具有1/8单位负载输入阻抗(96kΩ)，允许
最多256个收发器并行挂接在同一通信总线上。这些器件
降低EMI和反射
MAX13080E/MAX13081E/MAX13082E的低摆率驱动器可以
减小EMI，并降低由不恰当的终端匹配电缆引起的反射，
可实现最大 250kbps 的无差错数据传输。MAX13083E/
MAX13084E/MAX13085E提供较高的驱动器输出摆率，可
实现高达500kbps的传输速率。MAX13089E在SRL = VCC
或者 SRL 悬空时具有摆率控制功能。SRL 悬空时，
MAX13089E可实现高达250kbps的无差错数据传输。SRL
连接至VCC 时，数据传输速率可高达500kbps。
______________________________________________________________________________________
17
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
低功耗关断模式
(MAX13081E/MAX13084E/MAX13087E除外)
RE接高电平且DE接低电平时，启动低功耗关断模式。关
断模式下，器件仅吸收典型值为2.8µA的电源电流。
可以同时驱动RE和DE，如果RE为高电平且DE为低电平
的持续时间小于50ns，可以确保器件不会进入关断模式。
如果输入端维持这种状态700ns以上，则可确保这些器件
进入关断模式。
使能时间 t ZH 与 t ZL (见 Switching Characteristics 部分)假定
器件并未处于低功耗关断状态。使能时间 t ZH(SHDN) 与
tZL(SHDN)假定器件处于关断状态。从低功耗关断模式到驱
动器和接收器转变为有效状态所需要的时间(t ZH(SHDN) 、
t ZL(SHDN))，要比从禁用模式下转变为有效状态所需要的
时间(tZH、tZL)长。
A
R
RS-485/RS-422 标准适用于最大 4000 英尺的线路长度。
对大于 4000 英尺的线路长度，可采用图 11 所示的线路中
继器。
典型应用
MAX13082E/MAX13085E/MAX13088E/MAX13089E收发器
设计用于多点总线传输线上的双向数据通信。图 12 与图
13给出了典型网络应用电路。
_______________________________ 芯片信息
Z
D
传输线长度
DATA IN
B 120Ω
DE
DI
通过两种机制避免故障或总线冲突引起输出电流过大和
功耗过高。第一，输出级折返式限流，在整个共模电压
范围(参考典型工作特性 )内提供快速短路保护。第二，热
关断电路，当管芯温度超过 +175°C (典型值)时，强制驱
动器输出进入高阻状态。
为减小反射，应当在传输线两端以其特性阻抗进行终端
匹配，主干线以外的分支连线长度应尽可能短。具有摆
率限制的MAX13082E/MAX13085E以及工作在两种限摆率
模式下的MAX13089E能够允许不良终端匹配。
MAX13080E/MAX13081E/MAX13083E/
MAX13084E/MAX13086E/MAX13087E/
MAX13089E (FULL DUPLEX)
RO
RE
驱动器输出保护
TRANSISTOR COUNT: 1228
PROCESS: BiCMOS
DATA OUT
Y 120Ω
图11. MAX13080E/MAX13081E/MAX13083E/MAX13084E/
MAX13086E/MAX13087E/MAX13089E全双工模式下的线路中继器
120Ω
120Ω
DI
DE
B
B
D
D
DI
DE
RO
A
B
A
B
A
A
R
R
R
MAX13082E
MAX13085E
MAX13088E
MAX13089E (HALF DUPLEX)
R
D
D
DI
DE
RO RE
DI
DE
RO RE
图12. 典型半双工RS-485网络
18
RO
RE
RE
______________________________________________________________________________________
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
R
RO
RE
DE
Y
120Ω
120Ω
D
B
DI
Z
Z
120Ω
D
DI
DE
RE
RO
B
120Ω
R
Y
A
Y
Z
B
A
Y
Z
B
R
D
DI
A
MAX13080E
MAX13081E
MAX13083E
MAX13084E
MAX13086E
MAX13087E
MAX31089E (FULL DUPLEX)
R
D
DE RE RO
DI
DE RE RO
NOTE: RE AND DE ON MAX13080E/MAX13083E/MAX13086E/MAX13089E ONLY.
图13. 典型全双工RS-485网络
__________________________________________________________________________ 选型指南
HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED
LOW-POWER
SHUTDOWN
RECEIVER/
DRIVER
ENABLE
TRANSCEIVERS
ON BUS
PINS
Full
0.250
Yes
Yes
Yes
256
14
MAX13081E
Full
0.250
Yes
No
No
256
8
MAX13082E
Half
0.250
Yes
Yes
Yes
256
8
MAX13083E
Full
0.5
Yes
Yes
Yes
256
14
8
PART
MAX13080E
MAX13084E
Full
0.5
Yes
No
No
256
MAX13085E
Half
0.5
Yes
Yes
Yes
256
8
MAX13086E
Full
16
No
Yes
Yes
256
14
MAX13087E
Full
16
No
No
No
256
8
MAX13088E
Half
16
No
Yes
Yes
256
8
MAX13089E
Selectable
Selectable
Selectable
Yes
Yes
256
14
______________________________________________________________________________________
19
MAX13080E–MAX13089E
A
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
____________________________________________________________ 引脚配置和典型工作电路
VCC
DE
4
14 VCC
N.C. 1
RO
RE
0.1μF
14
2
13 N.C.
R
3
12 A
DE 4
11 B
DI 5
10 Z
D
GND 6
9 Y
GND 7
8 N.C.
VCC RE
A
Y
9
5
DI
MAX13080E
MAX13083E
MAX13086E
Rt
D
Z
12
2
RO
N.C.
B
Y
A
Rt
R
D
11
B
1, 8, 13
RO
R
10
DI
Z
GND
6, 7
3
GND DE
RE
TYPICAL FULL-DUPLEX OPERATING CIRCUIT
DIP/SO
0.1μF
MAX13081E
MAX13084E
MAX13087E
VCC 1
VCC 1
8
A
RO 2
7
B
DI 3
6
Z
5
Y
R
D
GND 4
5
3
DI
VCC
A
Y
Rt
D
Z
8
2
RO
B
Y
A
Rt
R
D
7
B
DIP/SO
RO
R
6
DI
Z
GND
4
GND
TYPICAL FULL-DUPLEX OPERATING CIRCUIT
0.1μF
RO 1
8
R
VCC
RO
RE 2
7
B
RE
DE 3
6
A
DE
5
GND
DI
DI 4
D
1
R
8
2
7
3
6
4
VCC
MAX13082E
MAX13085E
MAX13088E
D
B
A
5
Rt
A
GND
RO
R
RE
DIP/SO
TYPICAL HALF-DUPLEX OPERATING CIRCUIT
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORMS DIAGRAMS.
SEE PINS A AND B WHEN DE IS HIGH.
20
DI
B
Rt
D
DE
______________________________________________________________________________________
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
VCC
RE
MAX13089E
A
RO
TOP VIEW
H/F 1
14 VCC
RO 2
13 RXP
RE 3
12 A
DE 4
MAX13089E
11 B
DI 5
10 Z
SRL 6
9 Y
GND 7
8 TXP
B
RXP
H/F
Z
TXP
Y
DIP/SO
DI
NOTE: SWITCH POSITIONS
INDICATED FOR H/F = GND.
GND
DE
SRL
______________________________________________________________________________________
21
MAX13080E–MAX13089E
___________________________________________________________引脚配置和典型工作电路(续)
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
____________________________________________________________________________定购信息(续)
PINPACKAGE
PKG
CODE
0°C to +70°C
8 PDIP
0°C to +70°C
8 SO
8 PDIP
PART
TEMP RANGE
MAX13081ECPA
MAX13081ECSA
MAX13081EEPA
-40°C to +85°C
PINPACKAGE
PKG
CODE
0°C to +70°C
14 PDIP
P14-3
MAX13086ECSD
0°C to +70°C
14 SO
S14-2
MAX13086EEPD
-40°C to +85°C
14 PDIP
P14-3
MAX13086EESD
-40°C to +85°C
14 SO
S14-2
14 PDIP
P14-3
PART
TEMP RANGE
P8-2
MAX13086ECPD
S8-4
P8-2
MAX13081EESA
-40°C to +85°C
8 SO
S8-4
MAX13081EAPA
-40°C to +125°C
8 PDIP
P8-2
MAX13086EAPD
-40°C to +125°C
MAX13081EASA
-40°C to +125°C
8 SO
S8-4
MAX13086EASD
-40°C to +125°C
14 SO
S14-2
MAX13082ECPA
0°C to +70°C
8 PDIP
P8-2
MAX13087ECPA
0°C to +70°C
8 PDIP
P8-2
MAX13082ECSA
0°C to +70°C
8 SO
S8-4
MAX13087ECSA
0°C to +70°C
8 SO
S8-4
P8-2
MAX13087EEPA
-40°C to +85°C
8 PDIP
P8-2
MAX13087EESA
-40°C to +85°C
8 SO
S8-4
8 PDIP
P8-2
MAX13082EEPA
-40°C to +85°C
8 PDIP
MAX13082EESA
-40°C to +85°C
8 SO
S8-4
MAX13082EAPA
-40°C to +125°C
8 PDIP
P8-2
MAX13087EAPA
-40°C to +125°C
MAX13082EASA
-40°C to +125°C
8 SO
S8-4
MAX13087EASA
-40°C to +125°C
8 SO
S8-4
MAX13083ECPD
0°C to +70°C
14 PDIP
P14-3
MAX13088ECPA
0°C to +70°C
8 PDIP
P8-2
MAX13083ECSD
0°C to +70°C
14 SO
S14-2
MAX13088ECSA
0°C to +70°C
8 SO
S8-4
MAX13083EEPD
-40°C to +85°C
14 PDIP
P14-3
MAX13088EEPA
-40°C to +85°C
8 PDIP
P8-2
MAX13083EESD
-40°C to +85°C
14 SO
S14-2
MAX13088EESA
-40°C to +85°C
8 SO
S8-4
MAX13083EAPD
-40°C to +125°C
14 PDIP
P14-3
MAX13088EAPA
-40°C to +125°C
8 PDIP
P8-2
MAX13083EASD
-40°C to +125°C
14 SO
S14-2
MAX13088EASA
-40°C to +125°C
8 SO
S8-4
0°C to +70°C
8 PDIP
P8-2
MAX13089ECPD
0°C to +70°C
14 PDIP
P14-3
MAX13084ECSA
0°C to +70°C
8 SO
S8-4
MAX13089ECSD
0°C to +70°C
14 SO
S14-2
MAX13084EEPA
-40°C to +85°C
8 PDIP
P8-2
MAX13089EEPD
-40°C to +85°C
14 PDIP
P14-3
MAX13084EESA
-40°C to +85°C
8 SO
S8-4
MAX13089EESD
-40°C to +85°C
14 SO
S14-2
MAX13084EAPA
-40°C to +125°C
8 PDIP
P8-2
MAX13089EAPD
-40°C to +125°C
14 PDIP
P14-3
MAX13084EASA
-40°C to +125°C
8 SO
S8-4
MAX13089EASD
-40°C to +125°C
14 SO
S14-2
0°C to +70°C
8 PDIP
P8-2
MAX13085ECSA
0°C to +70°C
8 SO
S8-4
MAX13085EEPA
-40°C to +85°C
8 PDIP
P8-2
MAX13085EESA
-40°C to +85°C
8 SO
S8-4
MAX13085EAPA
-40°C to +125°C
8 PDIP
P8-2
MAX13085EASA
-40°C to +125°C
8 SO
S8-4
MAX13084ECPA
MAX13085ECPA
22
______________________________________________________________________________________
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
PDIPN.EPS
______________________________________________________________________________________
23
MAX13080E–MAX13089E
_____________________________________________________________________________ 封装信息
(本数据资料提供的封装图可能不是最近的规格，如需最近的封装外型信息，请查询 www.maxim-ic.com.cn/packages。)
___________________________________________________________________________封装信息(续 )
(本数据资料提供的封装图可能不是最近的规格，如需最近的封装外型信息，请查询 www.maxim-ic.com.cn/packages。)
DIM
A
A1
B
C
e
E
H
L
N
E
H
INCHES
MILLIMETERS
MAX
MIN
0.069
0.053
0.010
0.004
0.014
0.019
0.007
0.010
0.050 BSC
0.150
0.157
0.228
0.244
0.016
0.050
MAX
MIN
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
1.27 BSC
3.80
4.00
5.80
6.20
0.40
SOICN .EPS
MAX13080E–MAX13089E
+5.0V、±15kV ESD保护、失效保护、
热插拔、RS-485/RS-422收发器
1.27
VARIATIONS:
1
INCHES
TOP VIEW
DIM
D
D
D
MAX
0.197
0.344
0.394
MIN
0.189
0.337
0.386
MILLIMETERS
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
N MS012
8
AA
14
AB
16
AC
D
A
B
e
C
0∞-8∞
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
21-0041
REV.
B
1
1
MAXIM 北京办事处
北京 8328信箱 邮政编码 100083
免费电话：800 810 0310
电话：010-6211 5199
传真：010-6211 5299
Maxim不对Maxim产品以外的任何电路使用负责，也不提供其专利许可。Maxim保留在任何时间、没有任何通报的前提下修改产品资料和规格的权利。
24 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
© 2005 Maxim Integrated Products
Printed USA
是 Maxim Integrated Products, Inc. 的注册商标。
19-3590; Rev 2; 11/11
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Features
The MAX13080E–MAX13089E +5.0V, ±15kV ESD-protected, RS-485/RS-422 transceivers feature one driver and
one receiver. These devices include fail-safe circuitry,
guaranteeing a logic-high receiver output when receiver
inputs are open or shorted. The receiver outputs a logichigh if all transmitters on a terminated bus are disabled
(high impedance). The MAX13080E family include a hotswap capability to eliminate false transitions on the bus
during power-up or hot insertion.
The MAX13080E/MAX13081E/MAX13082E feature
reduced slew-rate drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables, allowing error-free data transmission up to
250kbps. The MAX13083E/MAX13084E also feature
slew-rate-limited drivers but allow transmit speeds up to
500kbps. The MAX13086E/MAX13087E/ MAX13088E
driver slew rates are not limited, making transmit
speeds up to 16Mbps possible. The MAX13089E slew
rate is pin selectable for 250kbps, 500kbps, and
16Mbps.
o +5.0V Operation
The MAX13082E/MAX13088E are intended for halfduplex communications, and the MAX13080E/
MAX13081E/MAX13083E/MAX13084E/MAX13086E/
MAX13087E are intended for full-duplex communications. The MAX13089E is selectable for half-duplex or
full-duplex operation. It also features independently
programmable receiver and transmitter output phase
through separate pins.
The MAX13080E family transceivers draw 1.2mA of
supply current when unloaded or when fully loaded with
the drivers disabled. All devices have a 1/8-unit load
receiver input impedance, allowing up to 256 transceivers on the bus.
The MAX13080E/MAX13083E/MAX13086E/MAX13089E
are available in 14-pin PDIP and 14-pin SO packages. The
MAX13081E/MAX13082E/MAX13084E/MAX13087E/
MAX13088E are available in 8-pin PDIP and 8-pin SO
packages. The devices operate over the commercial,
extended, and automotive temperature ranges.
o Available in Industry-Standard 8-Pin SO Package
Applications
o Extended ESD Protection for RS-485/RS-422 I/O Pins
±15kV Human Body Model
o True Fail-Safe Receiver While Maintaining
EIA/TIA-485 Compatibility
o Hot-Swap Input Structures on DE and RE
o Enhanced Slew-Rate Limiting Facilitates ErrorFree Data Transmission
(MAX13080E–MAX13084E/MAX13089E)
o Low-Current Shutdown Mode (Except
MAX13081E/MAX13084E/MAX13087E)
o Pin-Selectable Full-/Half-Duplex Operation
(MAX13089E)
o Phase Controls to Correct for Twisted-Pair
Reversal (MAX13089E)
o Allow Up to 256 Transceivers on the Bus
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX13080ECPD+
0°C to +70°C
14 PDIP
MAX13080ECSD+
0°C to +70°C
14 SO
MAX13080EEPD+
-40°C to +85°C
MAX13080EESD+
-40°C to +85°C
MAX13080EAPD+
14 PDIP
14 SO
14 PDIP
-40°C to +125°C
14 SO
MAX13080EASD+
-40°C to +125°C
+Denotes a lead(Pb)-free/RoHS-compliant package.
Ordering Information continued at end of data sheet.
Utility Meters
Lighting Systems
Industrial Control
Selector Guide, Pin Configurations, and Typical Operating
Circuits appear at end of data sheet.
Telecom
Security Systems
Instrumentation
Profibus
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX13080E–MAX13084E/MAX13086E–MAX13089E
General Description
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
(All Voltages Referenced to GND)
Supply Voltage (VCC).............................................................+6V
Control Input Voltage (RE, DE, SLR,
H/F, TXP, RXP)......................................................-0.3V to +6V
Driver Input Voltage (DI)...........................................-0.3V to +6V
Driver Output Voltage (Z, Y, A, B) .............................-8V to +13V
Receiver Input Voltage (A, B)....................................-8V to +13V
Receiver Input Voltage
Full Duplex (A, B) ..................................................-8V to +13V
Receiver Output Voltage (RO)....................-0.3V to (VCC + 0.3V)
Driver Output Current .....................................................±250mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C) .................471mW
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW
14-Pin SO (derate 8.33mW/°C above +70°C) ...............667mW
14-Pin Plastic DIP (derate 10.0mW/°C above +70°C) ...800mW
Operating Temperature Ranges
MAX1308_EC_ _ .................................................0°C to +75°C
MAX1308_EE_ _ ..............................................-40°C to +85°C
MAX1308_EA_ _ ............................................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
DRIVER
VCC Supply-Voltage Range
VCC
Differential Driver Output
VOD
4.5
RL = 100Ω (RS-422), Figure 1
3
VCC
RL = 54Ω (RS-485), Figure 1
2
VCC
VCC
0.2
V
3
V
0.2
V
Change in Magnitude of
Differential Output Voltage
ΔVOD
RL = 100Ω or 54Ω, Figure 1 (Note 2)
Driver Common-Mode Output
Voltage
VOC
RL = 100Ω or 54Ω, Figure 1
Change in Magnitude of
Common-Mode Voltage
ΔVOC
RL = 100Ω or 54Ω, Figure 1 (Note 2)
Input-High Voltage
VIH
DE, DI, RE, TXP, RXP, H/F
Input-Low Voltage
VIL
DE, DI, RE, TXP, RXP, H/F
VHYS
DE, DI, RE, TXP, RXP, H/F
Input Hysteresis
Input Current
IIN1
Input Impedance First Transition
Input Current
IIN2
VCC / 2
3
V
0.8
100
DE, DI, RE
±1
µA
1
10
kΩ
TXP, RXP, H/F internal pulldown
10
40
µA
VCC - 0.4
SRL Input-Middle Voltage
VCC x 0.3
SRL Input-Low Voltage
Output Leakage (Y and Z)
Full Duplex
2
V
VCC x 0.7
0.4
SRL = VCC
75
SRL = GND
IO
V
mV
DE
SRL Input-High Voltage
SRL Input Current
V
No load
DE = GND,
VCC = GND or VCC
-75
VIN = +12V
VIN = -7V
125
-100
_______________________________________________________________________________________
V
V
µA
µA
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.) (Note 1)
PARAMETER
Driver Short-Circuit Output
Current
Driver Short-Circuit Foldback
Output Current
SYMBOL
IOSD
IOSDF
CONDITIONS
MIN
TYP
MAX
0 ≤ VOUT ≤ +12V (Note 3)
40
250
-7V ≤ VOUT ≤ VCC (Note 3)
-250
-40
0 ≤ VOUT ≤ +12V, +85°C ≤ TA ≤ +125°C
(Note 3)
40
270
-7V ≤ VOUT ≤ VCC, +85°C ≤ TA ≤ +125°C
(Note 3)
-270
-40
(VCC - 1V) ≤ VOUT ≤ +12V (Note 3)
20
-7V ≤ VOUT ≤ +1V (Note 3)
-20
Thermal-Shutdown Threshold
TTS
175
Thermal-Shutdown Hysteresis
TTSH
15
VIN = +12V
UNITS
mA
mA
°C
°C
125
IA, B
DE = GND,
VCC = GND or VCC
Receiver Differential Threshold
Voltage
VTH
-7V ≤ VCM ≤ +12V
Receiver Input Hysteresis
ΔVTH
VA + VB = 0V
RO Output-High Voltage
VOH
IO = -1mA
RO Output-Low Voltage
VOL
IO = 1mA
0.4
V
Three-State Output Current at
Receiver
IOZR
0 ≤ VO ≤ VCC
±1
µA
Receiver Input Resistance
RIN
-7V ≤ VCM ≤ +12V
Receiver Output Short-Circuit
Current
IOSR
0V ≤ VRO ≤ VCC
Input Current (A and B)
VIN = -7V
-100
µA
RECEIVER
-200
-125
-50
15
mV
mV
VCC - 0.6
V
96
kΩ
±110
mA
SUPPLY CURRENT
Supply Current
ICC
Supply Current in Shutdown
Mode
ISHDN
No load, RE = 0, DE = VCC
1.2
1.8
No load, RE = VCC, DE = VCC
1.2
1.8
No load, RE = 0, DE = 0
1.2
1.8
RE = VCC, DE = GND
2.8
10
Human Body Model
±15
kV
Contact Discharge
IEC 61000-4-2
±6
kV
mA
µA
ESD PROTECTION
ESD Protection for Y, Z, A, and B
_______________________________________________________________________________________
3
MAX13080E–MAX13084E/MAX13086E–MAX13089E
DC ELECTRICAL CHARACTERISTICS (continued)
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
DRIVER SWITCHING CHARACTERISTICS
MAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Driver Propagation Delay
Driver Differential Output Rise or
Fall Time
Differential Driver Output Skew
|tDPLH - tDPHL|
SYMBOL
tDPLH
tDPHL
CONDITIONS
CL= 50pF, RL= 54Ω, Figures 2 and 3
tR , tF
CL= 50pF, RL= 54Ω, Figures 2 and 3
tDSKEW
CL= 50pF, RL= 54Ω, Figures 2 and 3
Maximum Data Rate
Driver Enable to Output High
MIN
TYP
MAX
UNITS
350
1800
350
1800
400
1900
ns
250
ns
250
ns
kbps
tDZH
Figure 4
2500
Driver Enable to Output Low
tDZL
Figure 5
2500
ns
Driver Disable Time from Low
tDLZ
Figure 5
100
ns
Driver Disable Time from High
tDHZ
Figure 4
100
ns
Driver Enable from Shutdown to
Output High
tDZH(SHDN) Figure 4
5500
ns
Driver Enable from Shutdown to
Output Low
tDZL(SHDN) Figure 5
5500
ns
700
ns
Time to Shutdown
tSHDN
50
340
ns
RECEIVER SWITCHING CHARACTERISTICS
MAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Receiver Propagation Delay
Receiver Output Skew
|tRPLH - tRPHL|
SYMBOL
tRPLH
tRPHL
tRSKEW
CONDITIONS
MIN
TYP
200
CL = 15pF, Figures 6 and 7
200
CL = 15pF, Figures 6 and 7
Maximum Data Rate
MAX
30
250
UNITS
ns
ns
kbps
Receiver Enable to Output Low
tRZL
Figure 8
50
ns
Receiver Enable to Output High
tRZH
Figure 8
50
ns
Receiver Disable Time from Low
tRLZ
Figure 8
50
ns
Receiver Disable Time from High
tRHZ
Figure 8
50
ns
Receiver Enable from Shutdown
to Output High
tRZH(SHDN) Figure 8
5500
ns
Receiver Enable from Shutdown
to Output Low
tRZL(SHDN) Figure 8
5500
ns
700
ns
Time to Shutdown
4
tSHDN
50
340
_______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Driver Propagation Delay
Driver Differential Output Rise or
Fall Time
Differential Driver Output Skew
|tDPLH - tDPHL|
SYMBOL
tDPLH
tDPHL
CONDITIONS
CL = 50pF, RL = 54Ω, Figures 2 and 3
tR , tF
CL = 50pF, RL = 54Ω, Figures 2 and 3
tDSKEW
CL = 50pF, RL = 54Ω, Figures 2 and 3
Maximum Data Rate
Driver Enable to Output High
MIN
TYP
MAX
UNITS
200
1000
200
1000
250
900
ns
140
ns
500
ns
kbps
tDZH
Figure 4
2500
Driver Enable to Output Low
tDZL
Figure 5
2500
ns
Driver Disable Time from Low
tDLZ
Figure 5
100
ns
Driver Disable Time from High
tDHZ
Figure 4
100
ns
Driver Enable from Shutdown to
Output High
tDZH(SHDN) Figure 4
5500
ns
Driver Enable from Shutdown to
Output Low
tDZL(SHDN) Figure 5
5500
ns
700
ns
Time to Shutdown
tSHDN
50
340
ns
RECEIVER SWITCHING CHARACTERISTICS
MAX13083E/MAX13084E/MAX13089E WITH SRL = VCC (500kbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Receiver Propagation Delay
Receiver Output Skew
|tRPLH - tRPHL|
SYMBOL
tRPLH
tRPHL
tRSKEW
CONDITIONS
MIN
TYP
200
CL = 15pF, Figures 6 and 7
200
CL = 15pF, Figures 6 and 7
Maximum Data Rate
MAX
30
500
UNITS
ns
ns
kbps
Receiver Enable to Output Low
tRZL
Figure 8
50
ns
Receiver Enable to Output High
tRZH
Figure 8
50
ns
Receiver Disable Time from Low
tRLZ
Figure 8
50
ns
Receiver Disable Time from High
tRHZ
Figure 8
50
ns
Receiver Enable from Shutdown
to Output High
tRZH(SHDN) Figure 8
5500
ns
Receiver Enable from Shutdown
to Output Low
tRZL(SHDN) Figure 8
5500
ns
700
ns
Time to Shutdown
tSHDN
50
340
_______________________________________________________________________________________
5
MAX13080E–MAX13084E/MAX13086E–MAX13089E
DRIVER SWITCHING CHARACTERISTICS
MAX13083E/MAX13084E/MAX13089E WITH SRL = VCC (500kbps)
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
DRIVER SWITCHING CHARACTERISTICS
MAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Driver Propagation Delay
Driver Differential Output Rise or
Fall Time
Differential Driver Output Skew
|tDPLH - tDPHL|
SYMBOL
tDPLH
tDPHL
CONDITIONS
MIN
TYP
MAX
50
CL = 50pF, RL= 54Ω, Figures 2 and 3
50
UNITS
ns
tR , tF
CL = 50pF, RL= 54Ω, Figures 2 and 3
15
ns
tDSKEW
CL = 50pF, RL= 54Ω, Figures 2 and 3
8
ns
Maximum Data Rate
16
Mbps
Driver Enable to Output High
tDZH
Figure 4
150
ns
Driver Enable to Output Low
tDZL
Figure 5
150
ns
Driver Disable Time from Low
tDLZ
Figure 5
100
ns
Driver Disable Time from High
tDHZ
Figure 4
100
ns
Driver Enable from Shutdown to
Output High
tDZH(SHDN) Figure 4
2200
ns
Driver Enable from Shutdown to
Output Low
tDZL(SHDN) Figure 5
2200
ns
700
ns
Time to Shutdown
tSHDN
50
340
RECEIVER SWITCHING CHARACTERISTICS
MAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C.)
PARAMETER
Receiver Propagation Delay
Receiver Output Skew
|tRPLH - tRPHL|
SYMBOL
tRPLH
tRPHL
tRSKEW
CONDITIONS
MIN
CL = 15pF, Figures 6 and 7
TYP
MAX
50
80
50
80
CL = 15pF, Figures 6 and 7
Maximum Data Rate
13
16
UNITS
ns
ns
Mbps
Receiver Enable to Output Low
tRZL
Figure 8
50
ns
Receiver Enable to Output High
tRZH
Figure 8
50
ns
Receiver Disable Time from Low
tRLZ
Figure 8
50
ns
Receiver Disable Time from High
tRHZ
Figure 8
50
ns
Receiver Enable from Shutdown
to Output High
tRZH(SHDN) Figure 8
2200
ns
Receiver Enable from Shutdown
to Output Low
tRZL(SHDN) Figure 8
2200
ns
700
ns
Time to Shutdown
tSHDN
50
340
Note 1: All currents into the device are positive. All currents out of the device are negative. All voltages are referred to device ground,
unless otherwise noted.
Note 2: ΔVOD and ΔVOC are the changes in VOD and VOC, respectively, when the DI input changes state.
Note 3: The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback output
current applies during current limiting to allow a recovery from bus contention.
6
_______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
1.30
1.20
DE = VCC
1.10
DE = 0
40
30
20
60
1.00
10
0.90
20
1
2
3
4
0
5
1
2
3
4
5
OUTPUT LOW VOLTAGE (V)
RECEIVER OUTPUT-HIGH VOLTAGE
vs. TEMPERATURE
RECEIVER OUTPUT-LOW VOLTAGE
vs. TEMPERATURE
DRIVER DIFFERENTIAL OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
4.6
4.4
0.6
0.5
0.4
0.3
0.2
4.2
0.1
4.0
0
140
120
100
80
60
40
20
0
-40 -25 -10
-40 -25 -10 5 20 35 50 65 80 95 110 125
160
MAX13080E-89E toc06
IO = 1mA
0.7
DIFFERENTIAL OUTPUT CURRENT (mA)
4.8
MAX13080E-89E toc05
5.0
0.8
OUTPUT LOW VOLTAGE (V)
5.2
MAX13080E-89E toc04
OUTPUT HIGH VOLTAGE (V)
IO = -1mA
5 20 35 50 65 80 95 110 125
0
1
2
3
4
5
TEMPERATURE (°C)
DIFFERENTIAL OUTPUT VOLTAGE (V)
DRIVER DIFFERENTIAL OUTPUT
VOLTAGE vs. TEMPERATURE
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-HIGH VOLTAGE
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-LOW VOLTAGE
4.0
3.6
3.2
2.8
2.4
2.0
180
160
140
120
100
80
60
5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
180
160
140
120
100
80
60
40
40
20
20
0
0
-40 -25 -10
200
MAX13080E-89E toc09
4.4
200
OUTPUT CURRENT (mA)
RL = 54Ω
OUTPUT CURRENT (mA)
4.8
MAX13080E-89E toc07
TEMPERATURE (°C)
MAX13080E-89E toc08
OUTPUT HIGH VOLTAGE (V)
30
TEMPERATURE (°C)
5.4
DIFFERENTIAL OUTPUT VOLTAGE (V)
40
0
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
50
10
0
0.80
MAX13080E-89E toc03
50
70
OUTPUT CURRENT (mA)
1.40
MAX13080E-89E toc02
SUPPLY CURRENT (mA)
1.50
60
OUTPUT CURRENT (mA)
NO LOAD
MAX13080E-89E toc01
1.60
OUTPUT CURRENT
vs. RECEIVER OUTPUT-LOW VOLTAGE
OUTPUT CURRENT
vs. RECEIVER OUTPUT-HIGH VOLTAGE
SUPPLY CURRENT vs. TEMPERATURE
-7 -6 -5 -4 -3 -2 -1 0
1
2
OUTPUT HIGH VOLTAGE (V)
3
4
5
0
2
4
6
8
10
12
OUTPUT-LOW VOLTAGE (V)
_______________________________________________________________________________________
7
MAX13080E–MAX13084E/MAX13086E–MAX13089E
Typical Operating Characteristics
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
6
5
4
3
2
tDPHL
1000
tDPLH
900
800
700
550
tDPHL
500
MAX13080E-89E toc12
7
1100
600
DRIVER PROPAGATION DELAY (ns)
8
1200
MAX13080E-89E toc11
SHUTDOWN CURRENT (μA)
9
DRIVER PROPAGATION DELAY (ns)
MAX13080E-89E toc10
10
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (500kbps)
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (250kbps)
SHUTDOWN CURRENT
vs. TEMPERATURE
tDPLH
450
400
350
1
0
300
600
-40 -25 -10
-40 -25 -10
5 20 35 50 65 80 95 110 125
-40 -25 -10 5 20 35 50 65 80 95 110 125
5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (16Mbps)
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE (250kpbs AND 500kbps)
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE (16Mbps)
50
40
30
tDPHL
20
10
140
120
100
tDPLH
80
60
tDPHL
40
20
tDPLH
0
5 20 35 50 65 80 95 110 125
160
140
120
100
80
tDPLH
60
40
tDPHL
20
0
0
-40 -25 -10
MAX13080E-89E toc15
160
180
RECEIVER PROPAGATION DELAY (ns)
60
MAX13080E-89E toc14
70
180
RECEIVER PROPAGATION DELAY (ns)
MAX13080E-89E toc13
80
DRIVER PROPAGATION DELAY (ns)
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
-40 -25 -10
TEMPERATURE (°C)
5 20 35 50 65 80 95 110 125
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
TEMPERATURE (°C)
RECEIVER PROPAGATION DELAY
(250kbps AND 500kbps)
DRIVER PROPAGATION DELAY (250kbps)
MAX13080E-89E toc16
MAX13080E-89E toc17
RL = 100Ω
RL = 100Ω
DI
2V/div
VA - V B
5V/div
RO
2V/div
VY - V Z
5V/div
2μs/div
8
200ns/div
_______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
RECEIVER PROPAGATION DELAY (16Mbps)
DRIVER PROPAGATION DELAY (16Mbps)
DRIVER PROPAGATION DELAY (500kbps)
MAX13080E-89E toc18
MAX13080E-89E toc19
RL = 100Ω
RL = 100Ω
MAX13080E-89E toc20
RL = 100Ω
VB
2V/div
DI
2V/div
DI
2V/div
VA
2V/div
VZ
2V/div
VY - V Z
5V/div
RO
2V/div
VY
2V/div
40ns/div
10ns/div
400ns/div
Test Circuits and Waveforms
VCC
Y
DI
VCC/2
0
RL/2
VOD
tDPHL
tDPLH
1/2 VO
Z
RL/2
VO
VOC
Y
1/2 VO
Z
VO
VDIFF 0
-VO
Figure 1. Driver DC Test Load
VDIFF = V (Y) - V (Z)
10%
90%
90%
10%
tF
tR
tSKEW = | tDPLH - tDPHL |
VCC
Figure 3. Driver Propagation Delays
DE
Y
DI
VOD
RL
CL
Z
Figure 2. Driver Timing Test Circuit
_______________________________________________________________________________________
9
MAX13080E–MAX13084E/MAX13086E–MAX13089E
Typical Operating Characteristics (continued)
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Test Circuits and Waveforms (continued)
S1
D
0 OR VCC
OUT
CL
50pF
GENERATOR
RL = 500Ω
50Ω
VCC
DE
VCC / 2
tDZH, tDZH(SHDN)
0
0.25V
OUT
VOH
VOM = (0 + VOH) / 2
0
tDHZ
Figure 4. Driver Enable and Disable Times (tDHZ, tDZH, tDZH(SHDN))
VCC
RL = 500Ω
S1
0 OR VCC
D
OUT
CL
50pF
GENERATOR
50Ω
VCC
DE
VCC / 2
tDZL, tDZL(SHDN)
0
tDLZ
VCC
VOM = (VOL + VCC) / 2
OUT
VOL
Figure 5. Driver Enable and Disable Times (tDZL, tDLZ, tDLZ(SHDN))
10
______________________________________________________________________________________
0.25V
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
RECEIVER
OUTPUT
B
VID
ATE
R
A
+1V
B
-1V
tRPLH
VOH
A
RO
tRPHL
VCC/2
VOL
THE RISE TIME AND FALL TIME OF INPUTS A AND B < 4ns
Figure 6. Receiver Propagation Delay Test Circuit
Figure 7. Receiver Propagation Delays
S1
+1.5V
S3
VCC
1kΩ
-1.5V
VID
R
CL
15pF
GENERATOR
S2
50Ω
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
VCC
VCC
VCC/2
RE
RE
0
0
tRZH, tRZH(SHDN)
tRZL, tRZL(SHDN)
VOH
RO
VCC
VOH / 2
(VOL + VCC) / 2
RO
0
S1 OPEN
S2 CLOSED
S3 = +1.5V
VOL
S1 CLOSED
S2 OPEN
S3 = -1.5V
VCC
VCC/2
VCC/2
RE
tRHZ
VCC
0
RE
0
tRLZ
VCC
VOH
0.25V
RO
0
RO
0.25V
VOL
Figure 8. Receiver Enable and Disable Times
______________________________________________________________________________________
11
MAX13080E–MAX13084E/MAX13086E–MAX13089E
Test Circuits and Waveforms (continued)
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Pin Description
PIN
MAX13080E MAX13081E
MAX13082E
MAX13083E MAX13084E
MAX13088E
MAX13086E MAX13087E
FULL-DUPLEX
DEVICES
NAME
HALFDUPLEX
DEVICES
FULLDUPLEX
MODE
HALFDUPLEX
MODE
FUNCTION
1, 8, 13
—
—
—
—
N.C.
No Connect. Not internally connected, can be connected
to GND.
—
—
—
1
1
H/F
Half-/Full-Duplex Select Input. Connect H/F to VCC for
half-duplex mode; connect H/F to GND or leave
unconnected for full-duplex mode.
2
2
1
2
2
RO
Receiver Output. When RE is low and if (A - B) ≥ -50mV,
RO is high; if (A - B) ≤ -200mV, RO is low.
RE
Receiver Output Enable. Drive RE low to enable RO; RO is
high impedance when RE is high. Drive RE high and DE
low to enter low-power shutdown mode. RE is a hot-swap
input (see the Hot-Swap Capability section for details).
3
—
2
3
3
4
—
3
4
4
DE
Driver Output Enable. Drive DE high to enable driver
outputs. These outputs are high impedance when DE is
low. Drive RE high and DE low to enter low-power
shutdown mode. DE is a hot-swap input (see the HotSwap Capability section for details).
5
3
4
5
5
DI
Driver Input. With DE high, a low on DI forces noninverting
output low and inverting output high. Similarly, a high on DI
forces noninverting output high and inverting output low.
—
—
—
6
6
SRL
Slew-Rate Limit Selector Input. Connect SRL to ground for
16Mbps communication rate; connect SRL to VCC for
500kbps communication rate. Leave SRL unconnected for
250kbps communication rate.
6, 7
4
5
7
7
GND
Ground
—
—
—
8
8
TXP
Transmitter Phase. Connect TXP to ground or leave TXP
unconnected for normal transmitter phase/polarity. Connect
TXP to VCC to invert the transmitter phase/polarity.
9
5
—
9
—
Y
Noninverting Driver Output
9
Y
Noninverting Driver Output and Noninverting Receiver
Input*
Inverting Driver Output
—
12
MAX13089E
—
—
—
10
6
—
10
—
Z
—
—
—
—
10
Z
Inverting Driver Output and Inverting Receiver Input*
11
7
—
11
—
B
Inverting Receiver Input
—
—
—
—
11
B
Receiver Input Resistors*
—
—
7
—
—
B
Inverting Receiver Input and Inverting Driver Output
______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
PIN
MAX13080E MAX13081E
MAX13082E
MAX13083E MAX13084E
MAX13088E
MAX13086E MAX13087E
FULL-DUPLEX
DEVICES
HALFDUPLEX
DEVICES
MAX13089E
NAME
FUNCTION
FULLHALFDUPLEX DUPLEX
MODE
MODE
12
8
—
12
—
A
Noninverting Receiver Input
—
—
—
—
12
A
Receiver Input Resistors*
—
—
6
—
—
A
Noninverting Receiver Input and Noninverting Driver
Output
—
—
—
13
13
RXP
Receiver Phase. Connect RXP to GND or leave RXP
unconnected for normal transmitter phase/polarity.
Connect RXP to VCC to invert receiver phase/polarity.
14
1
8
14
14
VCC
Positive Supply VCC = +5.0V ±10%. Bypass VCC to GND
with a 0.1µF capacitor.
*MAX13089E only. In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) still have a
1/8-unit load (96kΩ), but are not connected to the receiver.
Function Tables
MAX13080E/MAX13083E/MAX13086E
MAX13081E/MAX13084E/MAX13086E/
MAX13087E
TRANSMITTING
INPUTS
OUTPUTS
TRANSMITTING
RE
DE
DI
Z
Y
INPUT
X
1
1
0
1
DI
Z
Y
X
1
0
1
0
1
0
1
0
0
X
High-Z
High-Z
0
1
0
1
0
X
OUTPUTS
Shutdown
RECEIVING
RECEIVING
INPUTS
INPUTS
OUTPUT
RO
OUTPUT
A, B
RE
DE
A, B
RO
≥ -50mV
1
0
X
≥ -50mV
1
≤ -200mV
0
0
X
≤ -200mV
0
Open/shorted
1
0
X
Open/
shorted
1
1
1
X
High-Z
1
0
X
Shutdown
______________________________________________________________________________________
13
MAX13080E–MAX13084E/MAX13086E–MAX13089E
Pin Description (continued)
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Function Tables (continued)
MAX13082E/MAX13088E
RECEIVING
TRANSMITTING
INPUTS
INPUTS
OUTPUTS
OUTPUTS
RE
DE
DI
B/Z
A/Y
RE
DE
A-B
X
1
1
0
1
0
X
≥ -50mV
1
X
1
0
1
0
0
X
≤ -200mV
0
0
0
X
High-Z
1
0
X
0
X
Open/
shorted
1
1
1
X
High-Z
1
0
X
Shutdown
High-Z
Shutdown
RO
MAX13089E
TRANSMITTING
INPUTS
OUTPUTS
TXP
RE
DE
DI
Z
Y
0
X
1
1
0
1
0
X
1
0
1
0
1
X
1
1
1
0
1
X
1
0
0
1
X
0
0
X
High-Z
X
1
0
X
High-Z
Shutdown
RECEIVING
INPUTS
OUTPUTS
H/F
RXP
RE
DE
0
0
0
0
0
0
0
1
A, B
Y, Z
RO
X
> -50mV
X
1
X
< -200mV
X
0
0
X
> -50mV
X
0
0
1
0
X
< -200mV
X
1
1
0
0
0
X
> -50mV
1
1
0
0
0
X
< -200mV
0
1
1
0
0
X
> -50mV
0
1
1
0
0
X
< -200mV
1
0
0
0
X
Open/shorted
X
1
1
0
0
0
X
Open/shorted
1
0
1
0
X
Open/shorted
X
0
1
1
0
0
X
Open/shorted
0
X
X
1
1
X
X
High-Z
X
X
1
0
X
X
Shutdown
X = Don’t care; shutdown mode, driver, and receiver outputs are high impedance.
14
______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
The MAX13080E–MAX13089E high-speed transceivers
for RS-485/RS-422 communication contain one driver
and one receiver. These devices feature fail-safe circuitry, which guarantees a logic-high receiver output when
the receiver inputs are open or shorted, or when they
are connected to a terminated transmission line with all
drivers disabled (see the Fail-Safe section). The
MAX13080E/MAX13082E/MAX13083E/MAX13086E/
MAX13088E/MAX13089E also feature a hot-swap capability allowing line insertion without erroneous data transfer (see the Hot Swap Capability section). The
MAX13080E/MAX13081E/MAX13082E feature reduced
slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing
error-free data transmission up to 250kbps. The
MAX13083E/MAX13084E also offer slew-rate limits
allowing transmit speeds up to 500kbps. The
MAX13086E/MAX13087E/MAX13088Es’ driver slew
rates are not limited, making transmit speeds up to
16Mbps possible. The MAX13089E’s slew rate is selectable between 250kbps, 500kbps, and 16Mbps by driving a selector pin with a three-state driver.
The MAX13082E/MAX13088E are half-duplex transceivers,
while the MAX13080E/MAX13081E/ MAX13083E/
MAX13084E/MAX13086E/MAX13087E are full-duplex
transceivers. The MAX13089E is selectable between
half- and full-duplex communication by driving a selector pin (H/F) high or low, respectively.
All devices operate from a single +5.0V supply. Drivers
are output short-circuit current limited. Thermal-shutdown
circuitry protects drivers against excessive power dissipation. When activated, the thermal-shutdown circuitry
places the driver outputs into a high-impedance state.
Receiver Input Filtering
The receivers of the MAX13080E–MAX13084E, and the
MAX13089E when operating in 250kbps or 500kbps
mode, incorporate input filtering in addition to input
hysteresis. This filtering enhances noise immunity with
differential signals that have very slow rise and fall
times. Receiver propagation delay increases by 25%
due to this filtering.
Fail-Safe
The MAX13080E family guarantees a logic-high receiver
output when the receiver inputs are shorted or open, or
when they are connected to a terminated transmission
line with all drivers disabled. This is done by setting the
receiver input threshold between -50mV and -200mV. If
the differential receiver input voltage (A - B) is greater
than or equal to -50mV, RO is logic-high. If (A - B) is less
than or equal to -200mV, RO is logic-low. In the case of a
terminated bus with all transmitters disabled, the receiver’s differential input voltage is pulled to 0V by the termination. With the receiver thresholds of the MAX13080E
family, this results in a logic-high with a 50mV minimum
noise margin. Unlike previous fail-safe devices, the
-50mV to -200mV threshold complies with the ±200mV
EIA/TIA-485 standard.
Hot-Swap Capability (Except
MAX13081E/MAX13084E/MAX13087E)
Hot-Swap Inputs
When circuit boards are inserted into a hot or powered
backplane, differential disturbances to the data bus
can lead to data errors. Upon initial circuit board insertion, the data communication processor undergoes its
own power-up sequence. During this period, the
processor’s logic-output drivers are high impedance
and are unable to drive the DE and RE inputs of these
devices to a defined logic level. Leakage currents up to
±10µA from the high-impedance state of the processor’s logic drivers could cause standard CMOS enable
inputs of a transceiver to drift to an incorrect logic level.
Additionally, parasitic circuit board capacitance could
cause coupling of VCC or GND to the enable inputs.
Without the hot-swap capability, these factors could
improperly enable the transceiver’s driver or receiver.
When VCC rises, an internal pulldown circuit holds DE
low and RE high. After the initial power-up sequence,
the pulldown circuit becomes transparent, resetting the
hot-swap tolerable input.
Hot-Swap Input Circuitry
The enable inputs feature hot-swap capability. At the
input there are two NMOS devices, M1 and M2
(Figure 9). When VCC ramps from zero, an internal 7µs
timer turns on M2 and sets the SR latch, which also
turns on M1. Transistors M2, a 500µA current sink, and
M1, a 100µA current sink, pull DE to GND through a
5kΩ resistor. M2 is designed to pull DE to the disabled
state against an external parasitic capacitance up to
100pF that can drive DE high. After 7µs, the timer
deactivates M2 while M1 remains on, holding DE low
against three-state leakages that can drive DE high. M1
remains on until an external source overcomes the
required input current. At this time, the SR latch resets
and M1 turns off. When M1 turns off, DE reverts to a
standard, high-impedance CMOS input. Whenever VCC
drops below 1V, the hot-swap input is reset.
For RE there is a complementary circuit employing two
PMOS devices pulling RE to VCC.
______________________________________________________________________________________
15
MAX13080E–MAX13084E/MAX13086E–MAX13089E
Detailed Description
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
tion. Drive H/F high for half-duplex operation. In fullduplex mode, the pin configuration of the driver and
receiver is the same as that of a MAX13080E. In halfduplex mode, the receiver inputs are internally connected to the driver outputs through a resistor-divider. This
effectively changes the function of the device’s outputs.
Y becomes the noninverting driver output and receiver
input, Z becomes the inverting driver output and receiver
input. In half-duplex mode, A and B are still connected to
ground through an internal resistor-divider but they are
not internally connected to the receiver.
VCC
10μs
TIMER
SR LATCH
TIMER
±15kV ESD Protection
5kΩ
DE
(HOT SWAP)
DE
100μA
500μA
M1
M2
Figure 9. Simplified Structure of the Driver Enable Pin (DE)
MAX13089E Programming
The MAX13089E has several programmable operating
modes. Transmitter rise and fall times are programmable, resulting in maximum data rates of 250kbps,
500kbps, and 16Mbps. To select the desired data rate,
drive SRL to one of three possible states by using a
three-state driver: V CC , GND, or unconnected. For
250kbps operation, set the three-state device in highimpedance mode or leave SRL unconnected. For
500kbps operation, drive SRL high or connect it to VCC.
For 16Mbps operation, drive SRL low or connect it to
GND. SRL can be changed during operation without
interrupting data communications.
Occasionally, twisted-pair lines are connected backward
from normal orientation. The MAX13089E has two pins
that invert the phase of the driver and the receiver to correct this problem. For normal operation, drive TXP and
RXP low, connect them to ground, or leave them unconnected (internal pulldown). To invert the driver phase,
drive TXP high or connect it to VCC. To invert the receiver
phase, drive RXP high or connect it to VCC. Note that the
receiver threshold is positive when RXP is high.
The MAX13089E can operate in full- or half-duplex
mode. Drive H/F low, leave it unconnected (internal
pulldown), or connect it to GND for full-duplex opera16
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electrostatic discharges encountered during handling and
assembly. The driver outputs and receiver inputs of the
MAX13080E family of devices have extra protection
against static electricity. Maxim’s engineers have developed state-of-the-art structures to protect these pins
against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation,
shutdown, and powered down. After an ESD event, the
MAX13080E family keep working without latchup or
damage.
ESD protection can be tested in various ways. The
transmitter outputs and receiver inputs of the
MAX13080E family are characterized for protection to
the following limits:
• ±15kV using the Human Body Model
• ±6kV using the Contact Discharge method specified
in IEC 61000-4-2
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
Human Body Model
Figure 10a shows the Human Body Model, and Figure
10b shows the current waveform it generates when discharged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a
1.5kΩ resistor.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. However, it does
not specifically refer to integrated circuits. The
MAX13080E family of devices helps you design equipment to meet IEC 61000-4-2, without the need for additional ESD-protection components.
______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
CHARGE-CURRENTLIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
Cs
100pF
RD
1500Ω
RC
50MΩ TO 100MΩ
DISCHARGE
RESISTANCE
CHARGE-CURRENTLIMIT RESISTOR
DEVICE
UNDER
TEST
STORAGE
CAPACITOR
Figure 10a. Human Body ESD Test Model
IP 100%
90%
Cs
150pF
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
Figure 10c. IEC 61000-4-2 ESD Test Model
I
100%
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
IPEAK
Ir
HIGHVOLTAGE
DC
SOURCE
RD
330Ω
AMPS
36.8%
10%
0
10%
0
tRL
TIME
tDL
CURRENT WAVEFORM
Figure 10b. Human Body Current Waveform
The major difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2 because series resistance is
lower in the IEC 61000-4-2 model. Hence, the ESD withstand voltage measured to IEC 61000-4-2 is generally
lower than that measured using the Human Body Model.
Figure 10c shows the IEC 61000-4-2 model, and Figure
10d shows the current waveform for IEC 61000-4-2 ESD
Contact Discharge test.
Machine Model
The machine model for ESD tests all pins using a
200pF storage capacitor and zero discharge resistance. The objective is to emulate the stress caused
when I/O pins are contacted by handling equipment
during test and assembly. Of course, all pins require
this protection, not just RS-485 inputs and outputs.
tr = 0.7ns TO 1ns
t
30ns
60ns
Figure 10d. IEC 61000-4-2 ESD Generator Current Waveform
Applications Information
256 Transceivers on the Bus
The standard RS-485 receiver input impedance is 12kΩ
(1-unit load), and the standard driver can drive up to 32unit loads. The MAX13080E family of transceivers has a
1/8-unit load receiver input impedance (96kΩ), allowing
up to 256 transceivers to be connected in parallel on one
communication line. Any combination of these devices,
as well as other RS-485 transceivers with a total of 32unit loads or fewer, can be connected to the line.
Reduced EMI and Reflections
The MAX13080E/MAX13081E/MAX13082E feature
reduced slew-rate drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables, allowing error-free data transmission up to
250kbps. The MAX13083E/MAX13084E offer higher driver output slew-rate limits, allowing transmit speeds up
to 500kbps. The MAX13089E with SRL = VCC or unconnected are slew-rate limited. With SRL unconnected,
the MAX13089E error-free data transmission is up to
250kbps. With SRL connected to VCC, the data transmit
speeds up to 500kbps.
______________________________________________________________________________________
17
MAX13080E–MAX13084E/MAX13086E–MAX13089E
RC
1MΩ
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Low-Power Shutdown Mode (Except
MAX13081E/MAX13084E/MAX13087E)
Low-power shutdown mode is initiated by bringing both
RE high and DE low. In shutdown, the devices typically
draw only 2.8µA of supply current.
RE and DE can be driven simultaneously; the devices
are guaranteed not to enter shutdown if RE is high and
DE is low for less than 50ns. If the inputs are in this
state for at least 700ns, the devices are guaranteed to
enter shutdown.
Enable times t ZH and t ZL (see the Switching
Characteristics section) assume the devices were not in
a low-power shutdown state. Enable times tZH(SHDN) and
tZL(SHDN) assume the devices were in shutdown state. It
takes drivers and receivers longer to become enabled
from low-power shutdown mode (tZH(SHDN), tZL(SHDN))
than from driver/receiver-disable mode (tZH, tZL).
A
R
Line Length
The RS-485/RS-422 standard covers line lengths up to
4000ft. For line lengths greater than 4000ft, use the
repeater application shown in Figure 11.
Typical Applications
The MAX13082E/MAX13088E/MAX13089E transceivers
are designed for bidirectional data communications on
multipoint bus transmission lines. Figures 12 and 13
show typical network applications circuits.
To minimize reflections, terminate the line at both ends
in its characteristic impedance, and keep stub lengths
off the main line as short as possible. The slew-rate-limited MAX13082E and the two modes of the MAX13089E
are more tolerant of imperfect termination.
MAX13080E/MAX13081E/MAX13083E/
MAX13084E/MAX13086E/MAX13087E/
MAX13089E (FULL DUPLEX)
RO
RE
Driver Output Protection
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus contention.
The first, a foldback current limit on the output stage,
provides immediate protection against short circuits over
the whole common-mode voltage range (see the Typical
Operating Characteristics). The second, a thermal-shutdown circuit, forces the driver outputs into a high-impedance state if the die temperature exceeds +175°C (typ).
DATA IN
B 120Ω
DE
Chip Information
Z
DI
D
PROCESS: BiCMOS
DATA OUT
Y 120Ω
Figure 11. Line Repeater for MAX13080E/MAX13081E/
MAX13083E/MAX13084E/MAX13086E/MAX13087E/MAX13089E
in Full-Duplex Mode
120Ω
120Ω
DE
B
B
DI
D
D
DI
DE
RO
A
B
A
B
A
A
R
R
R
R
D
D
MAX13082E
MAX13088E
MAX13089E (HALF DUPLEX)
DI
DE
RO RE
DI
DE
RO RE
Figure 12. Typical Half-Duplex RS-485 Network
18
RO
RE
RE
______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
R
RO
RE
DE
Y
120Ω
120Ω
D
B
DI
Z
Z
D
DI
DE
RE
RO
B
120Ω
120Ω
R
Y
A
Y
Z
B
A
Y
Z
B
R
D
DI
A
MAX13080E
MAX13081E
MAX13083E
MAX13084E
MAX13086E
MAX13087E
MAX31089E (FULL DUPLEX)
R
D
DE RE RO
DI
DE RE RO
NOTE: RE AND DE ON MAX13080E/MAX13083E/MAX13086E/MAX13089E ONLY.
Figure 13. Typical Full-Duplex RS-485 Network
Selector Guide
PART
HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED
LOW-POWER
SHUTDOWN
RECEIVER/
DRIVER
ENABLE
TRANSCEIVERS
ON BUS
PINS
MAX13080E
Full
0.250
Yes
Yes
Yes
256
14
MAX13081E
Full
0.250
Yes
No
No
256
8
MAX13082E
Half
0.250
Yes
Yes
Yes
256
8
MAX13083E
Full
0.5
Yes
Yes
Yes
256
14
MAX13084E
Full
0.5
Yes
No
No
256
8
MAX13086E
Full
16
No
Yes
Yes
256
14
MAX13087E
Full
16
No
No
No
256
8
MAX13088E
Half
16
No
Yes
Yes
256
8
MAX13089E
Selectable
Selectable
Selectable
Yes
Yes
256
14
______________________________________________________________________________________
19
MAX13080E–MAX13084E/MAX13086E–MAX13089E
A
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
MAX13080E–MAX13084E/MAX13086E–MAX13089E
Pin Configurations and Typical Operating Circuits
VCC
DE
N.C. 1
RO
RE
0.1μF
14
4
14 VCC
2
3
12 A
DE 4
11 B
DI 5
10 Z
D
GND 6
9 Y
GND 7
8 N.C.
VCC RE
A
Y
9
5
DI
13 N.C.
R
MAX13080E
MAX13083E
MAX13086E
Rt
D
Z
12
2
RO
N.C.
B
Y
A
Rt
R
DI
D
11
B
1, 8, 13
RO
R
10
Z
GND
6, 7
3
GND DE
RE
TYPICAL FULL-DUPLEX OPERATING CIRCUIT
DIP/SO
0.1μF
MAX13081E
MAX13084E
MAX13087E
VCC 1
VCC 1
8
A
RO 2
7
B
DI 3
6
Z
5
Y
R
D
GND 4
5
3
DI
VCC
A
Y
Rt
D
Z
8
2
RO
B
Y
A
Rt
R
DI
D
7
B
DIP/SO
RO
R
6
Z
GND
4
GND
TYPICAL FULL-DUPLEX OPERATING CIRCUIT
0.1μF
RO 1
8
R
VCC
RO
RE 2
7
B
RE
DE 3
6
A
DE
5
GND
DI
DI 4
D
1
R
8
2
7
3
6
4
MAX13082E
MAX13088E
VCC
D
B
A
5
Rt
A
GND
RO
R
RE
DIP/SO
TYPICAL HALF-DUPLEX OPERATING CIRCUIT
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORMS DIAGRAMS.
SEE PINS A AND B WHEN DE IS HIGH.
20
DI
B
Rt
D
DE
______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
VCC
RE
MAX13089E
A
RO
TOP VIEW
H/F 1
14 VCC
RO 2
13 RXP
RE 3
DE 4
B
RXP
12 A
MAX13089E
DI 5
11 B
10 Z
SRL 6
9 Y
GND 7
8 TXP
H/F
Z
TXP
Y
DIP/SO
DI
NOTE: SWITCH POSITIONS
INDICATED FOR H/F = GND.
GND
DE
SRL
______________________________________________________________________________________
21
MAX13080E–MAX13084E/MAX13086E–MAX13089E
Pin Configurations and Typical Operating Circuits (continued)
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Ordering Information (continued)
PART
TEMP RANGE
PIN-PACKAGE
PART
TEMP RANGE
PIN-PACKAGE
MAX13081ECPA+
0°C to +70°C
8 PDIP
MAX13086ECPD+
0°C to +70°C
14 PDIP
MAX13081ECSA+
0°C to +70°C
8 SO
MAX13086ECSD+
0°C to +70°C
14 SO
MAX13081EEPA+
-40°C to +85°C
8 PDIP
MAX13086EEPD+
-40°C to +85°C
14 PDIP
MAX13081EESA+
-40°C to +85°C
8 SO
MAX13086EESD+
-40°C to +85°C
14 SO
MAX13081EAPA+
-40°C to +125°C
8 PDIP
MAX13086EAPD+
-40°C to +125°C
14 PDIP
MAX13081EASA+
-40°C to +125°C
8 SO
MAX13086EASD+
-40°C to +125°C
14 SO
MAX13082ECPA+
0°C to +70°C
8 PDIP
MAX13087ECPA+
0°C to +70°C
8 PDIP
MAX13082ECSA+
0°C to +70°C
8 SO
MAX13087ECSA+
0°C to +70°C
8 SO
MAX13082EEPA+
-40°C to +85°C
8 PDIP
MAX13087EEPA+
-40°C to +85°C
8 PDIP
MAX13082EESA+
-40°C to +85°C
8 SO
MAX13087EESA+
-40°C to +85°C
8 SO
MAX13082EAPA+
-40°C to +125°C
8 PDIP
MAX13087EAPA+
-40°C to +125°C
8 PDIP
MAX13082EASA+
-40°C to +125°C
8 SO
MAX13087EASA+
-40°C to +125°C
8 SO
MAX13083ECPD+
0°C to +70°C
14 PDIP
MAX13088ECPA+
0°C to +70°C
8 PDIP
MAX13083ECSD+
0°C to +70°C
14 SO
MAX13088ECSA+
0°C to +70°C
8 SO
MAX13083EEPD+
-40°C to +85°C
14 PDIP
MAX13088EEPA+
-40°C to +85°C
8 PDIP
MAX13083EESD+
-40°C to +85°C
14 SO
MAX13088EESA+
-40°C to +85°C
8 SO
MAX13083EAPD+
-40°C to +125°C
14 PDIP
MAX13088EAPA+
-40°C to +125°C
8 PDIP
MAX13083EASD+
-40°C to +125°C
14 SO
MAX13088EASA+
-40°C to +125°C
8 SO
0°C to +70°C
8 PDIP
MAX13089ECPD+
0°C to +70°C
14 PDIP
MAX13084ECSA+
0°C to +70°C
8 SO
MAX13089ECSD+
0°C to +70°C
14 SO
MAX13084EEPA+
-40°C to +85°C
8 PDIP
MAX13089EEPD+
-40°C to +85°C
14 PDIP
-40°C to +85°C
8 SO
MAX13089EESD+
-40°C to +85°C
14 SO
MAX13089EAPD+
-40°C to +125°C
14 PDIP
MAX13089EASD+
-40°C to +125°C
14 SO
MAX13084ECPA+
MAX13084EESA+
8 PDIP
-40°C to +125°C
8 SO
MAX13084EASA+
-40°C to +125°C
+Denotes a lead(Pb)-free/RoHS-compliant package.
MAX13084EAPA+
22
______________________________________________________________________________________
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
LAND PATTERN NO.
8 PDIP
P8+2
21-0043
—
90-0096
8 SO
S8+4
21-0041
14 PDIP
P14+3
21-0043
—
14 SO
S14+1
21-0041
90-0112
______________________________________________________________________________________
23
MAX13080E–MAX13084E/MAX13086E–MAX13089E
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
MAX13080E–MAX13084E/MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Revision History
REVISION
NUMBER
REVISION
DATE
2
11/11
DESCRIPTION
Deleted all reference to the MAX13085E
PAGES
CHANGED
1, 2, 3, 5, 12. 13, 14,
15, 16, 17, 18, 19,
20, 22
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 24
© 2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.