SIPEX SP3493EN

®
SP3493/SP3494
+3.3V Low Power
RS-485/RS-422 Transceivers
■ Operates From A Single +3.3V Supply
■ Interoperable With +5V Logic
■ +200mV Receiver Input Sensitivity
■ -7V to +12V Common-Mode Input
Voltage Range
■ Devices Allow Up To 32 Transceivers
On The Serial Bus
■ Driver/Receiver Enable Lines (SP3494)
■ 2nA Low-Power Shutdown Mode (SP3494)
■ Compatible With The MAX3488, LTC490
and 75179 Industry Standard Pinouts
(SP3493)
■ Compatible With The MAX3486 and 75176
Industry Standard Pinouts (SP3494)
DESCRIPTION
The SP3493 and the 3494 devices are +3.3V, low power transceivers that meet the
specifications of the RS-485 and RS-422 serial protocols. The SP3493 and the 3494 devices
are pin-to-pin compatible with the Sipex SP3490 and the SP3481 devices, respectively, as well
as other popular industry standards. The devices feature Sipex's BiCMOS process, allowing
low power operation without sacrificing performance. The partially slew-rate limited drivers
minimize EMI and reduce reflections caused by improperly terminated cables allowing
error-free data transmission. The SP3493 is a full-duplex low power transceiver that will
deliver a data transmission rate up to 250kbps. The SP3494 is a half-duplex partially slew-rate
limited transceiver that will deliver a data transmission rate up to 2.5Mbps. The SP3494 is
equipped with a low-power shutdown mode and driver/receiver high-Z enable lines.
Vcc 1
8 A
R 2
R
R
8
VCC
RE 2
7
B
DE 3
6
A
5
GND
RO 1
7 B
6 Z
D 3
D
GND 4
5 Y
D
DI 4
SP3493
10/16/02
SP3494
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
1
© Copyright 2002 Sipex Corporation
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at
these ratings or any other above those indicated in the operation sections
of the specifications below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect reliability.
VCC ............................................................................................ +6.0V
Input Voltages
Drivers ........................................................................ -0.3V to +6.0V
Receivers ................................................................................... ±14V
Output Voltages
Drivers ....................................................................................... ±14V
Receivers .................................................................... -0.3V to +6.0V
Storage Temperature ................................................. -65˚C to +150˚
Power Dissipation per Package
8-pin PDIP (derate11.8mW/oC above +70oC) ...................... 1000mW
8-pin NSOIC (derate 6.90mW/oC above +70oC) .................... 600mW
SPECIFICATIONS
TAMB = TMIN to TMAX and VCC = 3.3V ± 5% unless otherwise noted.
PARAMETERS
SP3493 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
Differential Output Voltage
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary States
Driver Common-Mode
Output Voltage
Input High Voltage
Input Low Voltage
Input Current
Driver Short-Circuit Current
VOUT = HIGH
VOUT = LOW
MIN.
TYP.
MAX.
UNITS
CONDITIONS
GND
2
VCC
VCC
Volts
Volts
1.5
VCC
Volts
Unloaded; R = ∞ Ω; Figure 1
With Load; R = 50Ω; (RS-422);
Figure 1
With Load; R = 27Ω; (RS-485); Figure 1
0.2
Volts
R = 27Ω or R = 50Ω; Figure 1
3
R = 27Ω or R = 50Ω; Figure 1
0.8
+10
Volts
Volts
Volts
µA
+250
+250
mA
mA
-7V < VO < +12V
-7V < VO < +12V
2.0
SP3493 DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output, tPLH
250
400
900
1500
kbps
ns
Figures 2 and 8
Driver Input to Output, tPHL
400
900
1500
ns
Figures 2 and 8
ns
tPHL(Y) - tPLH(Y) , tPHL(Z) - tPLH(Z) ,
Figures 2 and 8
Figures 2 and 8
From 10% to 90%; Figures 3 and 9
Differential Driver Skew
10
Driver Rise or Fall Time
10
SP3493 RECEIVER
DC Characteristics
Differential Input Threshold
0.2
Input Hysteresis
Output Voltage High
VCC-0.4
Output Voltage Low
Input Resistance
12
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
10/16/02
30
ns
+0.2
Volts
mV
Volts
Volts
kΩ
mA
mA
mA
25
0.4
15
1.0
-0.8
60
-7V < VCM < 12V
VCM = 0V
IO = -1.5mA, VID = +200mV
IO = +2.5mA, VID = -200mV
-7V < VCM < 12V
VIN = 12V
VIN = -7V
0V < VO < VCC
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
2
© Copyright 2002 Sipex Corporation
SPECIFICATIONS (continued)
TAMB = TMIN to TMAX and VCC = 3.3V ± 5% unless otherwise noted.
PARAMETERS
SP3493 RECEIVER
AC Characteristics
Maximum Data Rate
Receiver Input to Output, tPLH
MIN.
TYP.
MAX.
UNITS
250
35
70
120
kbps
ns
Figures 6 and 11
Receiver Input to Output, tPHL
35
70
120
ns
Figures 6 and 11
ns
Figures 6 and 11
2000
µA
D = 0 or VCC
VCC
VCC
Volts
Volts
Unloaded; R = ∞; Figure 1
with load; R = 50Ω; (RS-422); Figure 1
VCC
Volts
with load; R = 27Ω; (RS-485); Figure 1
0.2
Volts
R = 27Ω or R = 50Ω; Figure 1
3
0.8
+10
Volts
Volts
Volts
µA
R = 27Ω or R = 50Ω; Figure 1
Applies to DE, DI, RE
Applies to DE, DI, RE
Applies to DE, DI, RE
+250
+250
mA
mA
Differential Receiver Skew
10
SP3493 POWER REQUIREMENTS
Supply Current
SP3494 DRIVER
DC Characteristics
Differential Output Voltage
GND
Differential Output Voltage
2
1000
CONDITIONS
Differential Output Voltage
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary States
Driver Common-Mode
Output Voltage
Input High Voltage
Input Low Voltage
Input Current
Driver Short-Circuit Current
VOUT = HIGH
VOUT = LOW
SP3494 DRIVER
AC Characteristics
Maximum Data Rate
1.5
Driver Input to Output, tPLH
20
45
75
ns
Figures 2 and 8
Driver Input to Output, tPHL
20
45
75
ns
Figures 2 and 8
10
30
52
60
40
60
70
120
120
120
120
ns
ns
ns
ns
ns
ns
tDO1 - tDO2 , Figures 2 and 9
From 10% to 90%, Figures 3 and 9
Figures 4 and 10
Figures 5 and 10
Figures 5 and 10
Figures 4 and 10
2.0
2.5
Differential Driver Skew
Driver Rise or Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
SP3494 RECEIVER
DC Characteristics
Differential Input Threshold
-0.2
Input Hysteresis
Output Voltage High
VCC-0.4
Output Voltage Low
Three-State (High Impedance)
Output Current
Input Resistance
12
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
7
10/16/02
Mbps
+0.2
20
0.4
+1
15
1.0
-0.8
60
Volts
mV
Volts
Volts
µA
kΩ
mA
mA
mA
-7V < VO < +12V
-7V < VO < +12V
RE = VCC, DE = VCC
-7V < VCM < +12V
VCM = 0V
VID = +200mV, -1.5mA
VID = -200mV, 2.5mA
0V < VO < VCC; RE = VCC
-7V < VCM < +12V
DE = 0V, VCC = 0V or 3.6V, VIN = 12V
DE = 0V, VCC = 0V or 3.6V, VIN = -7V
0V < VCM < VCC
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
3
© Copyright 2002 Sipex Corporation
SPECIFICATIONS (continued)
TAMB = TMIN to TMAX and VCC = +3.3V ± 5% unless otherwise noted.
PARAMETERS
SP3494 RECEIVER
MIN.
TYP.
MAX.
UNITS
AC Characteristics
Maximum Data Rate
Receiver Input to Output, tPLH
2.5
40
70
100
Mbps
ns
RE = 0V, DE = 0V
Figures 6 and 11
Receiver Input to Output, tPHL
40
70
100
ns
Figures 6 and 11
ns
tRSKEW = tRPHL - tRPLH , Figures 6 and 11
Differential Receiver Skew
Receiver Enable to
Output Low
Receiver Enable to
Output High
Receiver Disable from Low
Receiver Disable from High
SP3494 SHUTDOWN TIMING
Time to Shutdown
Driver Enable from Shutdown
to Output High
Driver Enable from Shutdown
to Output Low
Receiver Enable from
Shutdown to Output High
Receiver Enable from
Shutdown to Output Low
10
50
SP3494 POWER REQUIREMENTS
Supply Current
No Load
Shutdown Mode
10/16/02
CONDITIONS
35
60
ns
Figures 7 and 12; S1 closed, S2 open
35
35
35
60
60
60
ns
ns
ns
Figures 7 and 12; S2 closed, S1 open
Figures 7 and 12; S1 closed, S2 open
Figures 7 and 12; S2 closed, S1 open
75
200
ns
RE = 3.3V, DE = 0V
65
150
ns
Figures 4 and 10
65
150
ns
Figures 5 and 10
50
200
ns
Figures 7 and 12; S2 closed, S1 open
50
200
ns
Figures 7 and 12; S1 closed, S2 open
1000
800
2000
1500
µA
µA
RE, DI = 0V or VCC; DE = VCC
RE = 0V, DI = 0V or VCC; DE = 0V
10
µA
DE = 0V, RE=VCC
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
4
© Copyright 2002 Sipex Corporation
PIN FUNCTION - SP3493
Vcc 1
Pin 1 - VCC - Positive supply +3.00 < VCC < +3.60
Pin 2 - R - Receiver output.
Pin 3 - D - Driver input.
Pin 4 - GND - Ground connection.
Pin 5 - Y - Non-inverting driver output.
Pin 6 - Z - Inverting driver output.
Pin 7 - B - Inverting receiver input.
Pin 8 - A - Non-inverting receiver input.
8 A
R 2
R
7 B
6 Z
D 3
D
5 Y
GND 4
SP3493
Pinout
PIN FUNCTION - SP3494
Pin 1 – RO – Receiver Output.
R
8
VCC
RE 2
7
B
DE 3
6
A
RO 1
Pin 2 – RE – Receiver Output Enable Active LOW.
Pin 3 – DE – Driver Output Enable Active HIGH.
Pin 4 – DI – Driver Input.
Pin 5 – GND – Ground Connection.
Pin 6 – A – Driver Output/Receiver Input
Non-inverting.
D
DI 4
5
GND
Pin 7 – B – Driver Output/Receiver Input Inverting.
Pin 8 – Vcc – Positive Supply +3.00V < VCC < +3.60V
SP3494
Pinout
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
5
© Copyright 2002 Sipex Corporation
The SP3493/SP3494 drivers will operate up to
250kbps and 2.5Mbps, respectively. In addition
to adhering to the 250mA ISC maximum limit on
the driver output, the driver output short-circuit
protection will allow the devices to withstand an
infinite short circuit over the -7.0V to +12V
common mode range without damage.
DESCRIPTION
The SP3493/3494 are +3.3V transceivers that
meet the electrical specifications of the
RS-485 and RS-422 serial protocols. The
SP3493/3494 feature Sipex's BiCMOS process
allowing low power operation without
sacrificing performance.
Receivers
The SP3493 device is a +3.3V full-duplex
transceiver that is pin-to-pin compatible with
the Sipex SP3490 and SP490 devices as well as
popular industry standards such as the
MAX3488, the LTC490, and the 75179. The
SP3493 has a driver with a data transmission
rate of 250kbps.
The receivers have differential inputs with an
input sensitivity as low +200mV. Input
impedance of the receivers is typically 15kΩ
(12kΩ minimum). A wide common mode range
of -7V to +12V allows for large ground potential
differences between systems.
Both the SP3493/SP3494 receivers are
equipped with fail-safe which guarantees that
the receiver outputs will be in a high state
when the input is left unconnected.
The SP3494 device is a +3.3V half-duplex
transceiver that is pin-to-pin compatible with
the Sipex SP3481 and SP481 devices as well as
popular industry standards such as the MAX3486
and the 75176. The SP3494 has a partially slewrate limited driver with a data transmission rate
of 2.5Mbps.
The SP3494 receiver has a high impedance
(high-Z) enable control pin. A logic LOW on
RE (pin 2) will enable the receiver; a logic
HIGH on RE (pin 2) will disable the receiver.
Drivers
The SP3494 is equipped with a shutdown mode.
To enable the shutdown state, both the driver
and receiver must be disabled simultaneously.
A logic LOW on DE (pin 3) and a logic HIGH
on RE (pin 2) will put the SP3494 into shutdown.
In shutdown, the supply current will drop to 2nA
typical, 1µA maximum.
The SP3493/3494devices both have differential
outputs. The typical voltage output swing with
no load will bo 0V to VCC. With worst case
loading of 54Ω across the differential outputs,
the driver can maintain greater than 1.5V voltage
levels.
The SP3494 device has an enable control line
which is active HIGH. A logic HIGH on DE (pin
3) will enable the differential driver outputs.
A logic LOW on DE (pin 3) will force the driver
outputs at high impedance (high-Z). The SP3493
device does not have a driver enable.
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
6
© Copyright 2002 Sipex Corporation
VDM
R
RL = 27Ω
S1
VOD
D
D
GENERATOR
(NOTE 1)
R
50Ω
VOC
VCC
OUT
CL = 15pF
(NOTE 2)
VCC
VOM = VOH + VOL
2
Figure 1. Driver DC Test Load Circuit
1.5V
Figure 2. Driver Propagation Delay Test Circuit
S1
D
CL
RL =
60Ω
D
GENERATOR
(NOTE 1)
OUT
OUT
RL = 110Ω
CL = 50pF
(NOTE 2)
GENERATOR
(NOTE 1)
50Ω
VCC
50Ω
CL = 15pF (NOTE 2)
VOM = VOH + VOL
2
Figure 3. Driver Differential Output Delay and
Transition Time Circuit
1.5V
Figure 4. Driver Enable and Disable Timing Circuit,
output HiGH
VCC
RL = 110Ω
VID
S1
0V OR 3V
D
GENERATOR
(NOTE 1)
OUT
R
OUT
50Ω
CL = 15pF
(NOTE 2)
CL = 50pF
(NOTE 2)
GENERATOR
(NOTE 1)
50Ω
1.5V
VOM = VCC
2
0V
Figure 6. Receiver Propagation Delay Test Circuit
Figure 5. Driver Enable and Disable Timing Circuit,
Output LOW
S1
S3
1.5V
VCC
1k
-1.5V
VID
R
S2
CL = 15pF
(NOTE 2)
GENERATOR
(NOTE 1)
50Ω
Figure 7. Receiver Enable and Disable Timing Circuit
INPUTS
RE
X
X
X
DE
1
1
0
OUTPUTS
DI
1
0
X
LINE
CONDITION
No Fault
No Fault
X
B
0
1
Z
INPUTS
RE
DE
0
0
0
0
0
0
1
0
A
1
0
Z
Table 1. Transmit Function Truth Table
10/16/02
A-B
+0.2V
-0.2V
Inputs Open
X
OUTPUTS
R
1
0
1
Z
Table 2. Receive Function Truth Table
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
7
© Copyright 2002 Sipex Corporation
3V
1.5V
1.5V
INPUT
3V
0V
VOH
tPLH
IN
tPHL
1.5V
1.5V
0V
VOM
VOM
Y OUTPUT
tDO1
tDO2
VOL
tPHL
tPLH
VOH
Z OUTPUT
OUT
VOM
VOM
2.0V
90%
90%
50%
10%
50%
10%
-2.0V
VOL
tTD
tTD
VOM = VOH + VOL ≈ 1.5V
2
Figure 9. Driver Differential Output Delay and
Transition Time Waveforms
Figure 8. Driver Propagation Delay Waveforms
3V
1.5V
1.5V
DE
0V
VOH
OUTPUT
HIGH
3V
tPHZ
tPZH
INPUT
0.25V
VOM
0V
VCC
1.5V
1.5V
tRPLH
tRPHL
0V
VCC
tPZL
OUTPUT
tPLZ
OUTPUT
LOW
VOM
VOL
VOM
VOM
0V
VOM = VCC
2
0.25V
VOM = VOH + VOL ≈ 1.5V
2
Figure 10. Driver Enable and Disable Timing Waveforms
Figure 11. Receiver Propagation Delay Waveforms
S1 is open
S2 is closed
S3 = 1.5V
S1 is closed
S2 is open
S3 = -1.5V
3V
3V
1.5V
1.5V
RE
0V
0V
tPRHZ
VOH
OUTPUT
1.5V
1.5V
RE
tPRZH
tPRSH
tPRLZ
tPRZL
tPRSL
VCC
10%
1.5V
OUTPUT
1.5V
VOL
0V
10%
Figure 12. Receiver Enable and Disable Waveforms
NOTE 1: The input pulse is supplied by a generator with the following characteristics:
PRR=250KHz, 50% duty cycle, tr < 6.0ns, Z0=50Ω.
NOTE 2: CL includes probe and stray capacitance.
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
8
© Copyright 2002 Sipex Corporation
PACKAGE: PLASTIC
DUAL–IN–LINE
(NARROW)
E1 E
D1 = 0.005" min.
(0.127 min.)
A1 = 0.015" min.
(0.381min.)
D
A = 0.210" max.
(5.334 max).
C
A2
e = 0.100 BSC
(2.540 BSC)
B1
B
Ø
L
eA = 0.300 BSC
(7.620 BSC)
ALTERNATE
END PINS
(BOTH ENDS)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
10/16/02
8–PIN
A2
0.115/0.195
(2.921/4.953)
B
0.014/0.022
(0.356/0.559)
B1
0.045/0.070
(1.143/1.778)
C
0.008/0.014
(0.203/0.356)
D
0.355/0.400
(9.017/10.160)
E
0.300/0.325
(7.620/8.255)
E1
0.240/0.280
(6.096/7.112)
L
0.115/0.150
(2.921/3.810)
Ø
0°/ 15°
(0°/15°)
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
9
© Copyright 2002 Sipex Corporation
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(NARROW)
E
H
h x 45°
D
A
Ø
e
B
A1
L
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
10/16/02
8–PIN
A
0.053/0.069
(1.346/1.748)
A1
0.004/0.010
(0.102/0.249
B
0.014/0.019
(0.35/0.49)
D
0.189/0.197
(4.80/5.00)
E
0.150/0.157
(3.802/3.988)
e
0.050 BSC
(1.270 BSC)
H
0.228/0.244
(5.801/6.198)
h
0.010/0.020
(0.254/0.498)
L
0.016/0.050
(0.406/1.270)
Ø
0°/8°
(0°/8°)
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
10
© Copyright 2002 Sipex Corporation
ORDERING INFORMATION
Model
SP3493CN
SP3493CP
SP3493EN
SP3493EP
SP3494CN
SP3494CP
SP3494EN
SP3494EP
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Temperature Range
0˚C to +70˚C
0˚C to +70˚C
.-40˚C to +85˚C
-40˚C to +85˚C
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0˚C to +70˚C
0˚C to +70˚C
-40˚C to +85˚C
-40˚C to +85˚C
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8-pin Narrow SOIC
8-pin Plastic DIP
8-pin Narrow SOIC
8-pin Plastic DIP
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Package
8-pin Narrow SOIC
8-pin Plastic DIP
8-pin Narrow SOIC
8-pin Plastic DIP
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Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: [email protected]
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
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© Copyright 2002 Sipex Corporation