DATASHEET
ISL83070E/71E/72E/73E/75E/76E/77E/78E
±15kV ESD Protected, 3.3V, Full Fail-safe, Low Power, High Speed or Slew Rate
Limited, RS-485/RS-422 Transceivers
The ISL8307xE (ISL83070E, ISL83071E, ISL83072E,
ISL83073E, ISL83075E, ISL83076E, ISL83077E,
ISL83078E) are BiCMOS 3.3V powered, single transceivers
Features
• Pb-Free (RoHS Compliant)
that meet both the RS-485 and RS-422 standards for
balanced communication. These devices have very low bus
currents (+125µA/-100µA), so they present a true “1/8 unit
load” to the RS-485 bus. This allows up to 256 transceivers
on the network without violating the RS-485 specification’s
32 unit load maximum, and without using repeaters. For
example, in a remote utility meter reading system, individual
meter readings are routed to a concentrator via an RS-485
network, so the high allowed node count minimizes the
number of repeaters required.
• RS-485 I/O Pin ESD Protection 15kV HBM
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
• Full Fail-safe (Open, Short, Terminated/Floating)
Receivers
• Hot Plug - Tx and Rx Outputs Remain Three-state During
Power-up (Only Versions with Output Enable Pins)
• True 1/8 Unit Load Allows up to 256 Devices on the Bus
• Single 3.3V Supply
• High Data Rates. . . . . . . . . . . . . . . . . . . . . . up to 20Mbps
Receiver (Rx) inputs feature a Full Fail-Safe design, which
ensures a logic high Rx output if Rx inputs are floating,
shorted, or terminated but undriven.
• Low Quiescent Supply Current . . . . . . . . . . .800µA (Max)
- Ultra Low Shutdown Supply Current . . . . . . . . . . .10nA
Hot Plug circuitry ensures that the Tx and Rx outputs remain
in a high impedance state while the power supply stabilizes.
• -7V to +12V Common Mode Input/Output Voltage Range
• Half and Full Duplex Pinouts
The ISL83070E through ISL83075E use slew rate limited
drivers which reduce EMI, and minimize reflections from
improperly terminated transmission lines, or unterminated
stubs in multidrop and multipoint applications. Slew rate limited
versions also include receiver input filtering to enhance noise
immunity in the presence of slow input signals.
• Three State Rx and Tx Outputs Available
• Current Limiting and Thermal Shutdown for driver
Overload Protection
• Tiny MSOP package offering saves 50% board space
Applications
The ISL83070E, ISL83071E, ISL83073E, ISL83076E,
ISL83077E are configured for full duplex (separate Rx input
and Tx output pins) applications. The half duplex versions
multiplex the Rx inputs and Tx outputs to allow transceivers
with output disable functions in 8 lead packages.
• Automated Utility Meter Reading Systems
• High Node Count Systems
• Field Bus Networks
• Security Camera Networks
• Building Environmental Control/ Lighting Systems
• Industrial/Process Control Networks
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
HALF/FULL DATARATE SLEW-RATE
HOT
PLUG?
#DEVICES
ON BUS
RX/TX
ENABLE?
QUIESCENT
(A)
LOW POWER
SHUTDOWN? COUNT
PIN
DUPLEX
FULL
FULL
HALF
FULL
HALF
FULL
FULL
HALF
(Mbps)
0.25
0.25
0.25
0.5
LIMITED?
YES
YES
YES
YES
YES
NO
I
CC
510
ISL83070E
ISL83071E
ISL83072E
ISL83073E
ISL83075E
ISL83076E
ISL83077E
ISL83078E
YES
NO
256
256
256
256
256
256
256
256
YES
NO
YES
NO
14
8
510
510
510
510
510
510
510
YES
YES
YES
YES
NO
YES
YES
YES
YES
NO
YES
YES
YES
YES
NO
8
14
8
0.5
20
14
8
20
NO
20
NO
YES
YES
YES
8
FN6115 Rev 5.02
Oct 2, 2023
Page 1 of 19
© 2005-2023 Renesas Electronics
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