DATASHEET

ISL31470E, ISL31472E, ISL31475E, ISL31478E
The ISL31470E, ISL31472E, ISL31475E, ISL31478E are
fault protected, extended common mode range
differential transceivers that exceed the RS-485 and
RS-422 standards for balanced communication. The
RS-485 bus pins (driver outputs and receiver inputs)
are protected against overvoltages up to ±60V.
Additionally, these transceivers operate in environments
with common mode voltages up to ±15V (exceeds the
RS-485 requirement), making this RS-485 family one
of the more robust on the market.
Features
Transmitters deliver an exceptional 2.5V (typical)
differential output voltage into the RS-485 specified 54Ω
load. This yields better noise immunity than standard
RS-485 ICs, or allows up to six 120Ω terminations in star
topologies.
• High Rx IOL for Opto-Couplers in Isolated Designs
Receiver (Rx) inputs feature a “Full Fail-Safe” design
which ensures a logic high Rx output if Rx inputs are
floating, shorted, or on a terminated but undriven (idle)
bus. Rx outputs feature high drive levels - typically
15mA @ VOL = 1V (to ease the design of opto-coupled
isolated interfaces).
Half duplex (Rx inputs and Tx outputs multiplexed
together) and full duplex pinouts are available. See Table
1 on page 2 for key features and configurations by device
number.
• Fault Protected RS-485 Bus Pins. . . . . . .up to ±60V
• Extended Common Mode Range . . . . . . . . . . . ±15V
Larger Than Required for RS-485
• 1/4 Unit Load for up to 128 Devices on the Bus
• High Transient Over Voltage Tolerance . . . . . . ±80V
• Full Fail-safe (Open, Short, Terminated) RS-485
Receivers
• Hot Plug Circuitry - Tx and Rx Outputs Remain
Three-State During Power-up/Power-down
• Choice of RS-485 Data Rates . . . . 250kbps to 15Mbps
• Low Quiescent Supply Current . . . . . . . . . . . 2.3mA
Ultra Low Shutdown Supply Current . . . . . . . . 10µA
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters/Automated Meter Reading Systems
• High Node Count Systems
• PROFIBUS™ and Field Bus Networks, and Factory
Automation
• Security Camera Networks
For an RS-485 family with a ±25V extended common
mode range, please see the ISL31490E and ISL31480E
data sheets.
• Building Lighting and Environmental Control Systems
Exceptional Rx Operates at
>15Mbps Even with ±15V
Common Mode Voltage
Transceivers Deliver Superior
Common Mode Range vs
Standard RS-485 Devices
20
• Industrial/Process Control Networks
15
VID = ±1V
B
12
COMMON MODE RANGE
VOLTAGE (V)
15
A
10
5
RO
0
0
-7
-15
-5
TIME (20ns/DIV)
September 3, 2015
FN7639.1
1
STANDARD RS-485
TRANSCEIVER
ISL3147xE
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas LLC 2010, 2015. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Fault Protected, Extended Common Mode Range,
RS-485/RS-422 Transceivers
ISL31470E, ISL31472E, ISL31475E, ISL31478E
TABLE 1. SUMMARY OF FEATURES
HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED?
EN
PINS?
HOT
PLUG?
QUIESCENT
ICC (mA)
LOW POWER
SHDN?
PIN
COUNT
ISL31470E
Full
0.25
Yes
Yes
Yes
2.3
Yes
14
ISL31472E
Half
0.25
Yes
Yes
Yes
2.3
Yes
8
ISL31475E
Half
1
Yes
Yes
Yes
2.3
Yes
8
ISL31478E
Half
15
No
Yes
Yes
2.3
Yes
8
PART NUMBER
Ordering Information
PART NUMBER
(Note 3)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL31470EIBZ (Note 1)
ISL31470 EIBZ
-40 to +85
14 Ld SOIC
M14.15
ISL31472EIBZ (Note 1)
31472 EIBZ
-40 to +85
8 Ld SOIC
M8.15
ISL31472EIPZ (Note 2) (No longer
available, recommended
replacement:ISL32472EIBZ)
31472 EIPZ
-40 to +85
8 Ld PDIP
E8.3
ISL31475EIBZ (Note 1)
31475 EIBZ
-40 to +85
8 Ld SOIC
M8.15
ISL31478EIBZ (Note 1)
31478 EIBZ
-40 to +85
8 Ld SOIC
M8.15
NOTES:
1. Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. Pb-free PDIPs can be used for through-hole wave solder processing only. They are not intended for use in Reflow solder
processing applications.
3. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both
SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
4. For Moisture Sensitivity Level (MSL), please see device information pages for ISL31470E, ISL31472E, ISL31475E, ISL31478E.
For more information on MSL please see techbrief TB363.
Pin Configurations
ISL31472E, ISL31475E, ISL31478E
(8 LD SOIC, 8 LD PDIP)
TOP VIEW
RO 1
R
RE 2
DE 3
DI 4
D
ISL31470E
(14 LD SOIC)
TOP VIEW
8 VCC
NC 1
7 B/Z
RO 2
6 A/Y
RE 3
5 GND
DE 4
DI 5
2
14 VCC
R
13 VCC
12 A
11 B
D
10 Z
GND 6
9 Y
GND 7
8 NC
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Truth Tables
TRANSMITTING
RECEIVING
INPUTS
OUTPUTS
INPUTS
RE
DE
DI
Z
Y
X
1
1
0
1
X
1
0
1
0
0
0
X
High-Z
High-Z
1
0
X
High-Z*
High-Z*
NOTE: *Low Power Shutdown Mode (see Note 13, page 9).
OUTPUT
RE
DE
Half Duplex
DE
Full Duplex
A-B
RO
0
0
X
 -0.01V
1
0
0
X
 -0.2V
0
0
0
X
Inputs
Open/Shorted
1
1
0
0
X
High-Z*
1
1
1
X
High-Z
NOTE: *Low Power Shutdown Mode (see Note 13, page 9).
Pin Descriptions
PIN
8 LD 14 LD
NAME PIN # PIN #
FUNCTION
RO
1
2
Receiver output: If A-B  -10mV, RO is high; If A-B  -200mV, RO is low; RO = High if A and B are
unconnected (floating), shorted together, or connected to an undriven, terminated bus.
RE
2
3
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. Internally
pulled low.
DE
3
4
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high
impedance when DE is low. Internally pulled high.
DI
4
5
Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y
high and output Z low.
GND
5
6, 7
A/Y
6
-
±60V Fault Protected, RS-485/RS-422 level, non-inverting receiver input and non-inverting driver
output. Pin is an input if DE = 0; pin is an output if DE = 1.
B/Z
7
-
±60V Fault Protected, RS-485/RS-422 level, inverting receiver input and inverting driver output. Pin is
an input if DE = 0; pin is an output if DE = 1.
A
-
12
±60V Fault Protected, RS-485/RS-422 level, non-inverting receiver input.
B
-
11
±60V Fault Protected, RS-485/RS-422 level, inverting receiver input.
Y
-
9
Z
-
VCC
8
NC
-
10
Ground connection.
±60V Fault Protected, RS-485/RS-422 level, non-inverting driver output.
±60V Fault Protected, RS-485/RS-422 level, inverting driver output.
13, 14 System power supply input (4.5V to 5.5V).
1, 8
No Internal Connection.
3
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Typical Operating Circuits
ISL31472E, ISL31475E, ISL31478E
+5V
+5V
+
0.1µF
8
1 RO
8
VCC
VCC
R
D
2 RE
B/Z 7
3 DE
A/Y 6
4 DI
+
0.1µF
RT
RT
DI 4
7
B/Z
DE 3
6
A/Y
RE 2
R
D
GND
GND
5
5
RO 1
ISL31470E
+5V
+5V
+
0.1µF
13, 14
VCC
2 RO
A 12
R
+
0.1µF
13, 14
9 Y VCC
RT
10 Z
B 11
D
3 RE
DE 4
4 DE
5 DI
DI 5
Z 10
Y 9
D
GND
6, 7
4
RT
RE 3
11 B
R
12 A
RO 2
GND
6, 7
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Absolute Maximum Ratings
Thermal Information
VCC to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . -0.3V to (VCC + 0.3V)
Input/Output Voltages
A/Y, B/Z, A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . ±60V
A/Y, B/Z, A, B, Y, Z
(Transient Pulse Through 100, Note 17). . . . . . . . ±80V
RO . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (VCC +0.3V)
Short Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
ESD Rating . . . . . . . . . . . . . . . . . . . see Specification Table
Latch-up (per JESD78, Level 2, Class A) . . . . . . . . . +125°C
Thermal Resistance (Typical)
JA (°C/W) JC (°C/W)
8 Ld PDIP* Package (Notes 5, 7) . . .
105
60
8 Ld SOIC Package (Notes 6, 7). . . .
116
47
14 Ld SOIC Package (Notes 6, 7) . . .
88
39
Maximum Junction Temperature (Plastic Package). . . . .+150°C
Maximum Storage Temperature Range. . . . . -65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
*Pb-free PDIPs can be used for through-hole wave solder
processing only. They are not intended for use in Reflow
solder processing applications.
Recommended Operating Conditions
Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Temperature Range . . . . . . . . . . . . . . . . . . -40°C to +85°C
Bus Pin Common Mode Voltage Range . . . . . . -15V to +15V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact
product reliability and result in failures not covered by warranty.
NOTES:
5. JA is measured with the component mounted on a low effective thermal conductivity test board in free air.
6. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief
TB379 for details.
7. For JC, the “case temp” location is taken at the package top center.
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V,
TA = +25°C (Note 8). Boldface limits apply over the operating temperature range,
-40°C to +85°C.
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
MIN
MAX
(°C) (Note 16) TYP (Note 16) UNITS
DC CHARACTERISTICS
Driver Differential VOUT
(No load)
VOD1
Driver Differential VOUT
(Loaded, Figure 1A)
VOD2
Full
-
-
VCC
V
RL = 100Ω (RS-422)
Full
2.4
3.2
-
V
RL = 54Ω (RS-485)
Full
1.5
2.5
VCC
V
RL = 54Ω (PROFIBUS, VCC ≥ 5V)
Full
2.0
2.5
-
RL = 21Ω (Six 120Ω terminations for
Star Configurations, VCC ≥ 4.75V)
Full
0.8
1.3
-
V
Change in Magnitude of Driver
Differential VOUT for
Complementary Output States
VOD
RL = 54Ω or 100Ω (Figure 1A)
Full
-
-
0.2
V
Driver Differential VOUT with
Common Mode Load
(Figure 1B)
VOD3
RL = 60Ω, -7V ≤ VCM ≤ 12V
Full
1.5
2.1
VCC
V
RL = 60Ω, -15V ≤ VCM ≤ 15V
(VCC ≥ 4.75V)
Full
1.7
2.3
-
v
Driver Common-Mode VOUT
(Figure 1A)
VOC
RL = 54Ω or 100Ω
Full
-1
-
3
V
Change in Magnitude of Driver
Common-Mode VOUT for
Complementary Output States
VOC
RL = 54Ω or 100Ω (Figure 1A)
Full
-
-
0.2
V
Driver Short-Circuit Current
IOSD
DE = VCC, -15V ≤ VO ≤ 15V (Note 10)
Full
-250
-
250
mA
IOSD1
At First Fold-back, 22V ≤ VO ≤ -22V
Full
-83
-
83
mA
IOSD2
At Second Fold-back, 35V ≤ VO ≤ -35V
Full
-13
-
13
mA
5
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V,
TA = +25°C (Note 8). Boldface limits apply over the operating temperature range,
-40°C to +85°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
MIN
MAX
(°C) (Note 16) TYP (Note 16) UNITS
Logic Input High Voltage
VIH
DE, DI, RE
Full
2.5
-
-
V
Logic Input Low Voltage
VIL
DE, DI, RE
Full
-
-
0.8
V
Logic Input Current
IIN1
DI
Full
-1
-
1
µA
DE, RE
Full
-15
6
15
µA
DE = 0V,
VIN = 12V
VCC = 0V or 5.5V
VIN = -7V
Full
-
110
250
µA
Full
-200
-75
-
µA
VIN = ±15V
Full
-800
±240
800
µA
VIN = ±60V
(Note 18)
Full
-6
±0.5
6
mA
VCC = 0V or 5.5V VIN = 12V
Full
-
90
125
µA
VIN = -7V
Full
-100
-70
-
µA
VIN = ±15V
Full
-500
±200
500
µA
VIN = ±60V
(Note 18)
Full
-3
±0.4
3
mA
Full
-
20
200
µA
Full
-100
-5
-
µA
VIN = ±15V
Full
-500
±40
500
µA
VIN = ±60V
(Note 18)
Full
-3
±0.1
3
mA
Input/Output Current
(A/Y, B/Z)
IIN2
Input Current (A, B)
(Full Duplex Versions Only)
IIN3
Output Leakage Current (Y, Z)
(Full Duplex Versions Only)
Receiver Differential Threshold
Voltage
IOZD
RE = 0V, DE = 0V, VIN = 12V
VCC = 0V or 5.5V
VIN = -7V
VTH
-15V ≤ VCM ≤ 15V
Full
-200
-100
-10
mV
Receiver Input Hysteresis
VTH
-15V ≤ VCM ≤ 15V
+25
-
25
-
mV
Receiver Output High Voltage
VOH
IO = -2mA, VID = -10mV
Full
VCC - 0.5
4.75
-
V
IO = -8mA, VID = -10mV
Full
2.8
4.2
-
V
Receiver Output Low Voltage
VOL
IO = 6mA, VID = -200mV
Full
-
0.27
0.4
V
Receiver Output Low Current
IOL
VO = 1V, VID = -200mV
Full
15
22
-
mA
Three-State (High Impedance)
Receiver Output Current
IOZR
0V ≤ VO ≤ VCC
Full
-1
0.01
1
µA
Receiver Short-Circuit Current
IOSR
0V ≤ VO ≤ VCC
Full
±12
-
±110
mA
DE = VCC, RE = 0V or VCC,
DI = 0V or VCC
Full
-
2.3
4.5
mA
DE = 0V, RE = VCC, DI = 0V or VCC
Full
-
10
50
µA
Human Body Model
(Tested per JESD22-A114E)
+25
-
±2
-
kV
Machine Model
(Tested per JESD22-A115-A)
+25
-
±700
-
V
SUPPLY CURRENT
No-Load Supply Current
(Note 9)
ICC
Shutdown Supply Current
ISHDN
ESD PERFORMANCE
All Pins
DRIVER SWITCHING CHARACTERISTICS (250kbps Versions; ISL31470E and ISL31472E)
Driver Differential Output Delay tPLH, tPHL RD = 54Ω, CD = 50pF (Figure 2)
Full
-
320
450
ns
Driver Differential Output Skew
Full
-
6
30
ns
6
tSKEW
RD = 54Ω, CD = 50pF (Figure 2)
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V,
TA = +25°C (Note 8). Boldface limits apply over the operating temperature range,
-40°C to +85°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
MIN
MAX
(°C) (Note 16) TYP (Note 16) UNITS
Driver Differential Rise or
Fall Time
tR, tF
RD = 54Ω, CD = 50pF (Figure 2)
Full
400
650
1200
ns
Maximum Data Rate
fMAX
CD = 820pF (Figure 4)
Full
0.25
1.5
-
Mbps
Driver Enable to Output High
tZH
SW = GND (Figure 3), (Note 11)
Full
-
-
1200
ns
Driver Enable to Output Low
tZL
SW = VCC (Figure 3), (Note 11)
Full
-
-
1200
ns
Driver Disable from Output
Low
tLZ
SW = VCC (Figure 3)
Full
-
-
120
ns
Driver Disable from Output
High
tHZ
SW = GND (Figure 3)
Full
-
-
120
ns
(Note 13)
Full
60
160
600
ns
Time to Shutdown
tSHDN
Driver Enable from Shutdown
to Output High
tZH(SHDN) SW = GND (Figure 3), (Notes 13, 14)
Full
-
-
2500
ns
Driver Enable from Shutdown
to Output Low
tZL(SHDN) SW = VCC (Figure 3), (Notes 13, 14)
Full
-
-
2500
ns
tPLH, tPHL RD = 54Ω, CD = 50pF (Figure 2)
Full
-
70
125
ns
DRIVER SWITCHING CHARACTERISTICS (1Mbps Versions; ISL31475E)
Driver Differential Output
Delay
Driver Differential Output Skew
tSKEW
RD = 54Ω, CD = 50pF (Figure 2)
Full
-
3
15
ns
Driver Differential Rise or Fall
Time
tR, tF
RD = 54Ω, CD = 50pF (Figure 2)
Full
70
230
300
ns
Maximum Data Rate
fMAX
CD = 820pF (Figure 4)
Full
1
4
-
Mbps
Driver Enable to Output High
tZH
SW = GND (Figure 3), (Note 11)
Full
-
-
350
ns
Driver Enable to Output Low
tZL
SW = VCC (Figure 3), (Note 11)
Full
-
-
300
ns
Driver Disable from Output
Low
tLZ
SW = VCC (Figure 3)
Full
-
-
120
ns
Driver Disable from Output
High
tHZ
SW = GND (Figure 3)
Full
-
-
120
ns
(Note 13)
Full
60
160
600
ns
Time to Shutdown
tSHDN
Driver Enable from Shutdown
to Output High
tZH(SHDN) SW = GND (Figure 3), (Notes 13, 14)
Full
-
-
2000
ns
Driver Enable from Shutdown
to Output Low
tZL(SHDN) SW = VCC (Figure 3), (Notes 13, 14)
Full
-
-
2000
ns
tPLH, tPHL RD = 54Ω, CD = 50pF (Figure 2)
Full
-
21
45
ns
DRIVER SWITCHING CHARACTERISTICS (15Mbps Versions; ISL31478E)
Driver Differential Output
Delay
Driver Differential Output Skew
tSKEW
RD = 54Ω, CD = 50pF (Figure 2)
Full
-
3
6
ns
Driver Differential Rise or Fall
Time
tR, tF
RD = 54Ω, CD = 50pF (Figure 2)
Full
5
17
30
ns
Maximum Data Rate
fMAX
CD = 470pF (Figure 4)
Full
15
25
-
Mbps
Driver Enable to Output High
tZH
SW = GND (Figure 3), (Note 11)
Full
-
-
100
ns
Driver Enable to Output Low
tZL
SW = VCC (Figure 3), (Note 11)
Full
-
-
100
ns
Driver Disable from Output
Low
tLZ
SW = VCC (Figure 3)
Full
-
-
120
ns
7
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V,
TA = +25°C (Note 8). Boldface limits apply over the operating temperature range,
-40°C to +85°C. (Continued)
PARAMETER
SYMBOL
Driver Disable from Output
High
tHZ
Time to Shutdown
tSHDN
TEST CONDITIONS
TEMP
MIN
MAX
(°C) (Note 16) TYP (Note 16) UNITS
SW = GND (Figure 3)
Full
-
-
120
ns
(Note 13)
Full
60
160
600
ns
Driver Enable from Shutdown
to Output High
tZH(SHDN) SW = GND (Figure 3), (Notes 13, 14)
Full
-
-
2000
ns
Driver Enable from Shutdown
to Output Low
tZL(SHDN) SW = VCC (Figure 3), (Notes 13, 14)
Full
-
-
2000
ns
RECEIVER SWITCHING CHARACTERISTICS (250kbps Versions; ISL31470E and ISL31472E)
(Figure 5)
Full
0.25
5
-
Mbps
Receiver Input to Output Delay tPLH, tPHL (Figure 5)
Full
-
200
280
ns
Receiver Skew |tPLH - tPHL |
(Figure 5)
Full
-
4
10
ns
Maximum Data Rate
fMAX
tSKD
Receiver Enable to Output Low
tZL
RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6), (Note 12)
Full
-
-
50
ns
Receiver Enable to Output High
tZH
RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6), (Note 12)
Full
-
-
50
ns
Receiver Disable from Output
Low
tLZ
RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6)
Full
-
-
50
ns
Receiver Disable from Output
High
tHZ
RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6)
Full
-
-
50
ns
(Note 13)
Full
60
160
600
ns
Time to Shutdown
tSHDN
Receiver Enable from
Shutdown to Output High
tZH(SHDN) RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6), (Notes 13, 15)
Full
-
-
2000
ns
Receiver Enable from
Shutdown to Output Low
tZL(SHDN) RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6), (Notes 13, 15)
Full
-
-
2000
ns
(Figure 5)
Full
1
15
-
Mbps
Receiver Input to Output Delay tPLH, tPHL (Figure 5)
Full
-
90
150
ns
Receiver Skew |tPLH - tPH |
(Figure 5)
Full
-
4
10
ns
RECEIVER SWITCHING CHARACTERISTICS (1Mbps Versions; ISL31475E)
Maximum Data Rate
fMAX
tSKD
Receiver Enable to Output Low
tZL
RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6), (Note 12)
Full
-
-
50
ns
Receiver Enable to Output High
tZH
RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6), (Note 12)
Full
-
-
50
ns
Receiver Disable from Output
Low
tLZ
RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6)
Full
-
-
50
ns
Receiver Disable from Output
High
tHZ
RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6)
Full
-
-
50
ns
(Note 13)
Full
60
160
600
ns
Time to Shutdown
tSHDN
Receiver Enable from
Shutdown to Output High
tZH(SHDN) RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6), (Notes 13, 15)
Full
-
-
2000
ns
Receiver Enable from
Shutdown to Output Low
tZL(SHDN) RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6), (Notes 13, 15)
Full
-
-
2000
ns
(Figure 5)
Full
15
25
-
Mbps
Receiver Input to Output Delay tPLH, tPHL (Figure 5)
Full
-
35
70
ns
RECEIVER SWITCHING CHARACTERISTICS (15Mbps Versions; ISL31478E)
Maximum Data Rate
fMAX
8
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V,
TA = +25°C (Note 8). Boldface limits apply over the operating temperature range,
-40°C to +85°C. (Continued)
PARAMETER
SYMBOL
Receiver Skew |tPLH - tPHL |
tSKD
TEMP
MIN
MAX
(°C) (Note 16) TYP (Note 16) UNITS
TEST CONDITIONS
(Figure 5)
Full
-
4
10
ns
Receiver Enable to Output Low
tZL
RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6), (Note 12)
Full
-
-
50
ns
Receiver Enable to Output High
tZH
RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6), (Note 12)
Full
-
-
50
ns
Receiver Disable from Output
Low
tLZ
RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6)
Full
-
-
50
ns
Receiver Disable from Output
High
tHZ
RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6)
Full
-
-
50
ns
(Note 13)
Full
60
160
600
ns
Time to Shutdown
tSHDN
Receiver Enable from
Shutdown to Output High
tZH(SHDN) RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6), (Notes 13, 15)
Full
-
-
2000
ns
Receiver Enable from
Shutdown to Output Low
tZL(SHDN) RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6), (Notes 13, 15)
Full
-
-
2000
ns
NOTES:
8. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground
unless otherwise specified.
9. Supply current specification is valid for loaded drivers when DE = 0V.
10. Applies to peak current. See “Typical Performance Curves” beginning on page 14 for more information.
11. Keep RE = 0 to prevent the device from entering SHDN.
12. The RE signal high time must be short enough (typically <100ns) to prevent the device from entering SHDN.
13. Transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 60ns, the parts
are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered
shutdown. See “Low Power Shutdown Mode” on page 14.
14. Keep RE = VCC, and set the DE signal low time >600ns to ensure that the device enters SHDN.
15. Set the RE signal high time >600ns to ensure that the device enters SHDN.
16. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established
by characterization and are not production tested.
17. Tested according to TIA/EIA-485-A, Section 4.2.6 (±80V for 15µs at a 1% duty cycle).
18. See “Caution” statement below the “Recommended Operating Conditions” section on page 5.
Test Circuits and Waveforms
VCC
RL/2
DE
DI
VCC
Z
DI
VOD
D
Z
Y
FIGURE 1A. VOD AND VOC
VOC
VCM
VOD
D
Y
RL/2
375Ω
RL/2
DE
VOC
RL/2
375Ω
FIGURE 1B. VOD AND VOC WITH COMMON MODE LOAD
FIGURE 1. DC DRIVER TEST CIRCUITS
9
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Test Circuits and Waveforms (Continued)
3V
DI
1.5V
1.5V
0V
tPHL
tPLH
VCC
DE
OUT (Z)
VOH
OUT (Y)
VOL
Z
DI
CD
D
RD
DIFF OUT (Y - Z)
Y
90%
10%
SIGNAL
GENERATOR
+VOD
90%
10%
tR
-VOD
tF
SKEW = |tPLH - tPHL|
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2A. TEST CIRCUIT
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DE
Z
DI
110Ω
D
SIGNAL
GENERATOR
VCC
SW
Y
GND
CL
3V
DE
PARAMETER OUTPUT
RE
DI
SW
CL
(pF)
Note 13
Y/Z
X
1/0
GND
50
tLZ
Y/Z
X
0/1
VCC
50
tZH
Y/Z
0 (Note 11)
1/0
GND
100
tZL
Y/Z
0 (Note 11)
0/1
VCC
100
Note 13
OUT (Y, Z)
Y/Z
1 (Note 14)
1/0
GND
100
tZL(SHDN)
Y/Z
1 (Note 14)
0/1
VCC
100
FIGURE 3A. TEST CIRCUIT
1.5V
0V
tZH, tZH(SHDN)
Note 13
tHZ
tZH(SHDN)
1.5V
tHZ
OUTPUT HIGH
VOH - 0.5V
2.3V
OUT (Y, Z)
VOH
0V
tZL, tZL(SHDN)
tLZ
VCC
2.3V
OUTPUT LOW
VOL + 0.5V V
OL
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
VCC
DE
+
Z
DI
54Ω
D
CD
Y
3V
DI
VOD
0V
-
SIGNAL
GENERATOR
DIFF OUT (Y - Z)
FIGURE 4A. TEST CIRCUIT
+VOD
-VOD
0V
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. DRIVER DATA RATE
10
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Test Circuits and Waveforms (Continued)
RE
B
R
A
SIGNAL
GENERATOR
B
15pF
RO
750mV
0V
0V
-750mV
A
tPLH
SIGNAL
GENERATOR
tPHL
VCC
50%
RO
50%
0V
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. RECEIVER PROPAGATION DELAY AND DATA RATE
RE
B
A
R
SIGNAL
GENERATOR
1kΩ
RO
15pF
VCC
SW
GND
Note 13
RE
3V
1.5V
1.5V
0V
PARAMETER
DE
A
SW
tHZ
0
+1.5V
GND
tLZ
0
-1.5V
VCC
tZH (Note 12)
0
+1.5V
GND
tZL (Note 12)
0
-1.5V
VCC
tZH(SHDN) (Note 15)
0
+1.5V
GND
tZL(SHDN) (Note 15)
0
-1.5V
VCC
FIGURE 6A. TEST CIRCUIT
tZH, tZH(SHDN)
Note 13
tHZ
OUTPUT HIGH
VOH - 0.5V
1.5V
RO
VOH
0V
tZL, tZL(SHDN)
tLZ
Note 13
VCC
RO
1.5V
OUTPUT LOW
VOL + 0.5V V
OL
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES
11
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Application Information
RS-485 and RS-422 are differential (balanced) data
transmission standards used for long haul or noisy
environments. RS-422 is a subset of RS-485, so RS-485
transceivers are also RS-422 compliant. RS-422 is a
point-to-multipoint (multidrop) standard, which allows
only one driver and up to 10 (assuming one unit load
devices) receivers on each bus. RS-485 is a true
multipoint standard, which allows up to 32 one unit load
devices (any combination of drivers and receivers) on
each bus. To allow for multipoint operation, the RS-485
specification requires that drivers must handle bus
contention without sustaining any damage.
Another important advantage of RS-485 is the extended
common mode range (CMR), which specifies that the
driver outputs and receiver inputs withstand signals that
range from +12V to -7V. RS-422 and RS-485 are
intended for runs as long as 4000’, thus the wide CMR is
necessary to handle ground potential differences, as well
as voltages induced in the cable by external fields.
The ISL31470E, ISL31472E, ISL31475E, ISL31478E is a
family of ruggedized RS-485 transceivers that improves
on the RS-485 basic requirements, and therefore
increases system reliability. The CMR increases to ±15V,
while the RS-485 bus pins (receiver inputs and driver
outputs) include fault protection against voltages and
transients up to ±60V. Additionally, larger than required
differential output voltages (VOD) increase noise
immunity.
Receiver (Rx) Features
These devices utilize a differential input receiver for
maximum noise immunity and common mode rejection.
Input sensitivity is better than ±200mV, as required by
the RS-422 and RS-485 specifications.
Receiver input (load) current surpasses the RS-422
specification of 3mA, and is four times lower than the
RS-485 “Unit Load (UL)” requirement of 1mA maximum.
Thus, these products are known as “one-quarter UL”
transceivers, and there can be up to 128 of these devices
on a network while still complying with the RS-485
loading specification.
The Rx functions with common mode voltages as great
as ±15V, making them ideal for industrial, or long
networks where induced voltages are a realistic concern.
All the receivers include a “full fail-safe” function that
guarantees a high level receiver output if the receiver
inputs are unconnected (floating), shorted together, or
connected to a terminated bus with all the transmitters
disabled (i.e., an idle bus).
Rx outputs feature high drive levels (typically 22mA @
VOL = 1V) to ease the design of optically-coupled
isolated interfaces.
The Rx in the 250kbps and 1Mbps versions include noise
filtering circuitry to reject high frequency signals. The
1Mbps version typically rejects pulses narrower than
50ns (equivalent to 20Mbps), while the 250kbps Rx
rejects pulses below 150ns (6.7Mbps).
Driver (Tx) Features
The RS-485/RS-422 driver is a differential output device
that delivers at least 1.5V across a 54Ω load (RS-485),
and at least 2.4V across a 100Ω load (RS-422). The
drivers feature low propagation delay skew to maximize
bit width, and to minimize EMI, and all drivers are
three-statable via the active high DE input.
The 250kbps and 1Mbps driver outputs are slew rate
limited to minimize EMI, and to minimize reflections in
unterminated or improperly terminated networks.
Outputs of the ISL31478E drivers are not limited, thus,
faster output transition times allow data rates of at least
15Mbps.
High Overvoltage (Fault) Protection
Increases ruggedness
The ±60V (referenced to the IC GND) fault protection on
the RS-485 pins, makes these transceivers some of the
most rugged on the market. This level of protection
makes the ISL31470E, ISL31472E, ISL31475E,
ISL31478E perfect for applications where power
(e.g., 24V and 48V supplies) must be routed in the
conduit with the data lines, or for outdoor applications
where large transients are likely to occur. When power is
routed with the data lines, even a momentary short
between the supply and data lines will destroy an
unprotected device. The ±60V fault levels of this family
are at least five times higher than the levels specified
for standard RS-485 ICs. The ISL31470E, ISL31472E,
ISL31475E, ISL31478E protection is active whether the
Tx is enabled or disabled, and even if the IC is powered
down.
If transients or voltages (including overshoots and
ringing) greater than ±60V are possible, then additional
external protection is required.
Wide Common Mode Voltage (CMV)
Tolerance Improves Operating Range
RS-485 networks operating in industrial complexes, or
over long distances, are susceptible to large CMV
variations. Either of these operating environments may
suffer from large node-to-node ground potential
differences, or CMV pickup from external electromagnetic
sources, and devices with only the minimum required
+12V to -7V CMR may malfunction. The ISL31470E,
ISL31472E, ISL31475E, ISL31478E’s extended ±15V
CMR allows for operation in environments that would
overwhelm lesser transceivers. Additionally, the Rx will
not phase invert (erroneously change state) even with
CMVs of ±40V, or differential voltages as large as 40V.
Receivers easily meet the data rates supported by the
corresponding driver, and all receiver outputs are
three-statable via the active low RE input.
12
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
High VOD Improves Noise Immunity and
Flexibility
Data Rate, Cables, and Terminations
The ISL31470E, ISL31472E, ISL31475E, ISL31478E
driver design delivers larger differential output voltages
(VOD) than the RS-485 standard requires, or than most
RS-485 transmitters can deliver. The typical ±2.5V VOD
provides more noise immunity than networks built using
many other transceivers.
Another advantage of the large VOD is the ability to drive
more than two bus terminations, which allows for utilizing
the ISL31470E, ISL31472E, ISL31475E, ISL31478E in
“star” and other multi-terminated, nonstandard network
topologies. Figure 8, details the transmitter’s VOD vs IOUT
characteristic, and includes load lines for four (30Ω) and
six (20Ω) 120Ω terminations. Figure 8 shows that the
driver typically delivers ±1.3V into six terminations, and
the “Electrical Specification” table guarantees a VOD of
±0.8V at 21Ω over the full temperature range. The
RS-485 standard requires a minimum 1.5V VOD into two
terminations, but the ISL31470E, ISL31472E,
ISL31475E, ISL31478E deliver RS-485 voltage levels with
2x to 3x the number of terminations.
Hot Plug Function
DE, DI = VCC
5.0
RE = GND
2.8V
2.5
0
5.0
RL = 1kΩ
2.5
0
A/Y
ISL3147xE
ISL83088E
RL = 1kΩ
RO
ISL3147xE
5.0
2.5
0
RECEIVER OUTPUT (V)
DRIVER Y OUTPUT (V)
3.5V
VCC
VCC (V)
When a piece of equipment powers up, there is a period
of time where the processor or ASIC driving the RS-485
control lines (DE, RE) is unable to ensure that the
RS-485 Tx and Rx outputs are kept disabled. If the
equipment is connected to the bus, a driver activating
prematurely during power-up may crash the bus. To
avoid this scenario, the ISL31470E, ISL31472E,
ISL31475E, ISL31478E devices incorporate a “Hot Plug”
function. Circuitry monitoring VCC ensures that, during
power-up and power-down, the Tx and Rx outputs
remain disabled, regardless of the state of DE and RE, if
VCC is less than ≈3.5V. This gives the processor/ASIC a
chance to stabilize and drive the RS-485 control lines to
the proper states. Figure 7 illustrates the power-up and
power-down performance of the ISL31470E, ISL31472E,
ISL31475E, ISL31478E compared to an RS-485 IC
without the Hot Plug feature.
TIME (40µs/DIV)
FIGURE 7. HOT PLUG PERFORMANCE (ISL3147xE) vs
ISL83088E WITHOUT HOT PLUG CIRCUITRY
13
RS-485/RS-422 are intended for network lengths up to
4000’, but the maximum system data rate decreases as
the transmission length increases. Devices operating at
15Mbps may be used at lengths up to 150’ (46m), but
the distance can be increased to 328’ (100m) by
operating at 10Mbps. The 1Mbps versions can operate at
full data rates with lengths up to 800’ (244m). Jitter is
the limiting parameter at these faster data rates, so
employing encoded data streams (e.g., Manchester
coded or Return-to-Zero) may allow increased
transmission distances. The slow versions can operate at
115kbps, or less, at the full 4000’ (1220m) distance, or
at 250kbps for lengths up to 3000’ (915m). DC cable
attenuation is the limiting parameter, so using better
quality cables (e.g., 22 AWG) may allow increased
transmission distance.
Twisted pair is the cable of choice for RS-485/RS-422
networks. Twisted pair cables tend to pick up noise and
other electromagnetically induced voltages as common
mode signals, which are effectively rejected by the
differential receivers in these ICs.
Proper termination is imperative, when using the 15Mbps
devices, to minimize reflections. Short networks using
the 250kbps versions need not be terminated, however,
terminations are recommended unless power dissipation
is an overriding concern.
In point-to-point, or point-to-multipoint (single driver on
bus like RS-422) networks, the main cable should be
terminated in its characteristic impedance (typically
120Ω) at the end farthest from the driver. In
multi-receiver applications, stubs connecting receivers to
the main cable should be kept as short as possible.
Multipoint (multi-driver) systems require that the main
cable be terminated in its characteristic impedance at
both ends. Stubs connecting a transceiver to the main
cable should be kept as short as possible.
Built-In Driver Overload Protection
As stated previously, the RS-485 specification requires
that drivers survive worst case bus contentions
undamaged. These transceivers meet this requirement
via driver output short circuit current limits, and on-chip
thermal shutdown circuitry.
The driver output stages incorporate a double fold-back
short circuit current limiting scheme which ensures that
the output current never exceeds the RS-485
specification, even at the common mode and fault
condition voltage range extremes. The first fold-back
current level (≈70mA) is set to ensure that the driver
never folds back when driving loads with common mode
voltages up to ±15V. The very low second fold-back
current setting (≈9mA) minimizes power dissipation if
the Tx is enabled when a fault occurs.
In the event of a major short circuit condition, devices
also include a thermal shutdown feature that disables
the drivers whenever the die temperature becomes
excessive. This eliminates the power dissipation,
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
allowing the die to cool. The drivers automatically
re-enable after the die temperature drops about 15°C.
If the contention persists, the thermal
shutdown/re-enable cycle repeats until the fault is
cleared. Receivers stay operational during thermal
shutdown.
ICC to a 10µA trickle. These devices enter shutdown
whenever the receiver and driver are simultaneously
disabled (RE = VCC and DE = GND) for a period of at
least 600ns. Disabling both the driver and the receiver
for less than 60ns guarantees that the transceiver will
not enter shutdown.
Low Power Shutdown Mode
Note that receiver and driver enable times increase when
the transceiver enables from shutdown. Refer to Notes
11, 12, 13, 14 and 15, at the end of the “Electrical
Specification” table on page 9, for more information.
These CMOS transceivers all use a fraction of the power
required by competitive devices, but they also include a
shutdown feature that reduces the already low quiescent
DRIVER OUTPUT CURRENT (mA)
90
RD = 20Ω
80
RD = 30Ω
+25°C
70
RD = 54Ω
+85°C
60
50
40
RD = 100Ω
30
20
10
0
0
1
2
3
4
DIFFERENTIAL OUTPUT VOLTAGE (V)
5
FIGURE 8. DRIVER OUTPUT CURRENT vs
DIFFERENTIAL OUTPUT VOLTAGE
DIFFERENTIAL OUTPUT VOLTAGE (V)
Typical Performance Curves VCC = 5V, TA = +25°C; Unless Otherwise Specified.
RD = 100Ω
3.2
3
2.8
2.6
RD = 54Ω
2.4
2.2
-40
-25
0
25
50
TEMPERATURE (°C)
75 85
70
RECEIVER OUTPUT CURRENT (mA)
2.40
DE = VCC, RE = X
2.35
2.30
ICC (mA)
3.4
FIGURE 9. DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs TEMPERATURE
2.45
2.25
DE = GND, RE = GND
2.20
2.15
2.10
2.05
2.00
-40
3.6
-25
0
25
50
TEMPERATURE (°C)
75 85
FIGURE 10. SUPPLY CURRENT vs TEMPERATURE
14
60
VOL, +25°C
50
VOL, +85°C
40
30
20
10
0
-10
VOH, +85°C
-20
-30
VOH, +25°C
0
1
2
3
4
RECEIVER OUTPUT VOLTAGE (V)
5
FIGURE 11. RECEIVER OUTPUT CURRENT vs RECEIVER
OUTPUT VOLTAGE
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Typical Performance Curves VCC = 5V, TA = +25°C; Unless Otherwise Specified. (Continued)
800
340
RD = 54Ω, CD = 50pF
335
PROPAGATION DELAY (ns)
BUS PIN CURRENT (µA)
600
400
200
Y OR Z
0
-200
-400
A/Y OR B/Z
-600
-70
-50
-30
-10 0 10
30
50
330
tPLH
325
320
315
tPHL
310
305
300
-40
70
-25
BUS PIN VOLTAGE (V)
FIGURE 12. BUS PIN CURRENT vs BUS PIN VOLTAGE
8
85
PROPAGATION DELAY (ns)
7
SKEW (ns)
5
4
3
2
1
-25
0
50
25
TEMPERATURE (°C)
80
75
70
tPLH
65
tPHL
60
55
50
-40
75 85
FIGURE 14. DRIVER DIFFERENTIAL SKEW vs
TEMPERATURE (ISL31470E, ISL31472E)
27
PROPAGATION DELAY (ns)
3.0
2.5
-25
0
50
25
TEMPERATURE (°C)
75 85
FIGURE 15. DRIVER DIFFERENTIAL PROPAGATION
DELAY vs TEMPERATURE (ISL31475E)
RD = 54Ω, CD = 50pF
3.5
SKEW (ns)
RD = 54Ω, CD = 50pF
|tPLH - tPHL|
0
-40
4.0
75 85
FIGURE 13. DRIVER DIFFERENTIAL PROPAGATION
DELAY vs TEMPERATURE (ISL31470E,
ISL31472E)
RD = 54Ω, CD = 50pF
6
25
0
50
TEMPERATURE (°C)
RD = 54Ω, CD = 50pF
25
23
tPLH
21
19
tPHL
17
|tPLH - tPHL|
2.0
-40
-25
0
50
25
TEMPERATURE (°C)
FIGURE 16. DRIVER DIFFERENTIAL SKEW vs
TEMPERATURE (ISL31475E)
15
75 85
15
-40
-25
25
0
50
TEMPERATURE (°C)
75 85
FIGURE 17. DRIVER DIFFERENTIAL PROPAGATION
DELAY vs TEMPERATURE (ISL31478E)
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Typical Performance Curves VCC = 5V, TA = +25°C; Unless Otherwise Specified. (Continued)
3.4
RD = 54Ω, CD = 50pF
3.2
SKEW (ns)
3.0
2.8
2.6
2.4
2.2
|tPLH - tPHL|
2.0
-40
-25
0
50
25
TEMPERATURE (°C)
75 85
FIGURE 18. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE (ISL31478E)
10
A
15
B
VID = ±1V
10
0
5
RO
0
5
RO
0
-5
-5
-10
A
-15
B
RO
0
-10
-15
VID = ±1V
5
RO
VOLTAGE (V)
VOLTAGE (V)
5
A
B
A
B
TIME (1µs/DIV)
TIME (400ns/DIV)
15
10
A
B
VID = ±1V
VOLTAGE (V)
5
RO
0
5
RO
0
-5
-10
-15
A
B
TIME (20ns/DIV)
FIGURE 21. ±15V RECEIVER PERFORMANCE
(ISL31478E)
16
FIGURE 20. ±15V RECEIVER PERFORMANCE
(ISL31475E)
DRIVER OUTPUT (V) RECEIVER OUTPUT (V)
FIGURE 19. ±15V RECEIVER PERFORMANCE
(ISL31470E, ISL31472E)
RD = 54Ω, CD = 50pF
DI
5
0
3
2
1
0
-1
-2
-3
5
0
RO
DRIVER INPUT (V)
15
A/Y - B/Z
TIME (1µs/DIV)
FIGURE 22. DRIVER AND RECEIVER WAVEFORMS
(ISL31470E, ISL31472E)
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
0
3
2
1
0
-1
-2
-3
0
RO
A/Y - B/Z
TIME (400ns/DIV)
FIGURE 23. DRIVER AND RECEIVER WAVEFORMS
(ISL31475E)
RD = 54Ω, CD = 50pF
DI
5
0
3
2
1
0
-1
-2
-3
5
0
RO
DRIVER INPUT (V)
5
5
DRIVER OUTPUT (V) RECEIVER OUTPUT (V)
RD = 54Ω, CD = 50pF
DI
DRIVER INPUT (V)
DRIVER OUTPUT (V) RECEIVER OUTPUT (V)
Typical Performance Curves VCC = 5V, TA = +25°C; Unless Otherwise Specified. (Continued)
A/Y - B/Z
TIME (20ns/DIV)
FIGURE 24. DRIVER AND RECEIVER WAVEFORMS
(ISL31478E)
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND
PROCESS:
Si Gate BiCMOS
17
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to
web to make sure you have the latest Rev.
DATE
REVISION
CHANGE
September 3, 2015
FN7639.1
- Updated Ordering Information Table on page 2.
- Added About Intersil Verbiage.
June 17, 2010
FN7639.0
Initial Release
About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The
company's products address some of the largest markets within the industrial and infrastructure, mobile computing
and high-end consumer markets.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective
product information page found at www.intersil.com.
You may report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask.
Reliability reports are also available from our website at www.intersil.com/support.
For additional products, see www.intersil.com/product_tree
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications
at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by
Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any
infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any
patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
18
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Package Outline Drawing
M14.15
14 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
Rev 1, 10/09
8.65
A 3
4
0.10 C A-B 2X
6
14
DETAIL"A"
8
0.22±0.03
D
6.0
3.9
4
0.10 C D 2X
0.20 C 2X
7
PIN NO.1
ID MARK
5
0.31-0.51
B 3
(0.35) x 45°
4° ± 4°
6
0.25 M C A-B D
TOP VIEW
0.10 C
1.75 MAX
H
1.25 MIN
0.25
GAUGE PLANE C
SEATING PLANE
0.10 C
0.10-0.25
1.27
SIDE VIEW
(1.27)
DETAIL "A"
(0.6)
NOTES:
1. Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2. Dimensioning and tolerancing conform to AMSEY14.5m-1994.
3. Datums A and B to be determined at Datum H.
(5.40)
4. Dimension does not include interlead flash or protrusions.
Interlead flash or protrusions shall not exceed 0.25mm per side.
5. The pin #1 indentifier may be either a mold or mark feature.
(1.50)
6. Does not include dambar protrusion. Allowable dambar protrusion
shall be 0.10mm total in excess of lead width at maximum condition.
7. Reference to JEDEC MS-012-AB.
TYPICAL RECOMMENDED LAND PATTERN
19
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Dual-In-Line Plastic Packages (PDIP)
E8.3 (JEDEC MS-001-BA ISSUE D)
N
8 LEAD DUAL-IN-LINE PLASTIC PACKAGE
E1
INDEX
AREA
1 2 3
INCHES
N/2
-B-
-AD
E
BASE
PLANE
-C-
SEATING
PLANE
A2
A
L
D1
e
B1
D1
A1
eC
B
0.010 (0.25) M
C A B S
MILLIMETERS
SYMBOL
MIN
MAX
MIN
MAX
NOTES
A
-
0.210
-
5.33
4
A1
0.015
-
0.39
-
4
A2
0.115
0.195
2.93
4.95
-
B
0.014
0.022
0.356
0.558
-
C
L
B1
0.045
0.070
1.15
1.77
8, 10
eA
C
0.008
0.014
0.204
C
D
0.355
0.400
9.01
eB
NOTES:
1. Controlling Dimensions: INCH. In case of conflict between
English and Metric dimensions, the inch dimensions control.
0.005
-
0.13
-
5
E
0.300
0.325
7.62
8.25
6
E1
0.240
0.280
6.10
7.11
5
e
0.100 BSC
eA
0.300 BSC
3. Symbols are defined in the “MO Series Symbol List” in Section
2.2 of Publication No. 95.
eB
-
L
0.115
5. D, D1, and E1 dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch
(0.25mm).
6. E and eA are measured with the leads constrained to be perpendicular to datum -C- .
5
D1
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
4. Dimensions A, A1 and L are measured with the package seated
in JEDEC seating plane gauge GS-3.
0.355
10.16
N
8
2.54 BSC
7.62 BSC
0.430
-
0.150
2.93
8
6
10.92
7
3.81
4
9
Rev. 0 12/93
7. eB and eC are measured at the lead tips with the leads unconstrained. eC must be zero or greater.
8. B1 maximum dimensions do not include dambar protrusions.
Dambar protrusions shall not exceed 0.010 inch (0.25mm).
9. N is the maximum number of terminal positions.
10. Corner leads (1, N, N/2 and N/2 + 1) for E8.3, E16.3, E18.3,
E28.3, E42.6 will have a B1 dimension of 0.030 - 0.045 inch
(0.76 - 1.14mm).
20
FN7639.1
September 3, 2015
ISL31470E, ISL31472E, ISL31475E, ISL31478E
Small Outline Plastic Packages (SOIC)
M8.15 (JEDEC MS-012-AA ISSUE C)
N
INDEX
AREA
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
H
0.25(0.010) M
B M
INCHES
E
SYMBOL
-B1
2
3
L
SEATING PLANE
-A-
A
D
h x 45°
-C-
e
A1
B
0.25(0.010) M
C
0.10(0.004)
C A M
MIN
MAX
MIN
MAX
NOTES
A
0.0532
0.0688
1.35
1.75
-
A1
0.0040
0.0098
0.10
0.25
-
B
0.013
0.020
0.33
0.51
9
C
0.0075
0.0098
0.19
0.25
-
D
0.1890
0.1968
4.80
5.00
3
E
0.1497
0.1574
3.80
4.00
4
e

B S
0.050 BSC
-
0.2284
0.2440
5.80
6.20
-
h
0.0099
0.0196
0.25
0.50
5
L
0.016
0.050
0.40
1.27
6

1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of
Publication Number 95.
1.27 BSC
H
N
NOTES:
MILLIMETERS
8
0°
8
8°
0°
7
8°
Rev. 1 6/05
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate burrs.
Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006
inch) per side.
4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per
side.
5. The chamfer on the body is optional. If it is not present, a visual index
feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater
above the seating plane, shall not exceed a maximum value of
0.61mm (0.024 inch).
10. Controlling dimension: MILLIMETER. Converted inch dimensions
are not necessarily exact.
21
FN7639.1
September 3, 2015
Similar pages