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ISL83070E, ISL83071E, ISL83072E, ISL83073E,
ISL83075E, ISL83076E,
ISL83077E,
ISL83078E
Data Sheet
August 5, 2005
FN6115.1
卤
15kV ESD Protected, 3.3V, Full Fail-safe,
Low Power, High Speed or Slew Rate
Limited, RS-485/RS-422 Transceivers
The Intersil ISL8307XE are BiCMOS 3.3V powered, single
transceivers that meet both the RS-485 and RS-422
standards for balanced communication.
These devices have
very low bus currents (+125碌A/-100碌A), so they present a
true 鈥?/8 unit load鈥?to the RS-485 bus. This allows up to 256
transceivers on the network without violating the RS-485
specification鈥檚 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.
Receiver (Rx) inputs feature a 鈥淔ull Fail-Safe鈥?design, which
ensures a logic high Rx output if Rx inputs are floating,
shorted, or terminated but undriven.
Hot Plug circuitry ensures that the Tx and Rx outputs remain
in a high impedance state while the power supply stabilizes.
The ISL83070E through ISL83075E utilize 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.
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.
Features
鈥?Pb-Free Plus Anneal (RoHS Compliant)
鈥?RS-485 I/O Pin ESD Protection . . . . . . . . . .
卤
15kV HBM
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
鈥?Full Fail-safe (Open, Short, Terminated/Floating)
Receivers
鈥?Hot Plug - Tx and Rx Outputs Remain Three-state During
Power-up
鈥?True 1/8 Unit Load Allows up to 256 Devices on the Bus
鈥?Single 3.3V Supply
鈥?High Data Rates . . . . . . . . . . . . . . . . . . . . . up to 20Mbps
鈥?Low Quiescent Supply Current . . . . . . . . . . 800
碌
A (Max)
- Ultra Low Shutdown Supply Current . . . . . . . . . . 10nA
鈥?-7V to +12V Common Mode Input/Output Voltage Range
鈥?Half and Full Duplex Pinouts
鈥?Three State Rx and Tx Outputs Available
鈥?Current Limiting and Thermal Shutdown for driver
Overload Protection
鈥?Tiny MSOP package offering saves 50% board space
Applications
鈥?Automated Utility Meter Reading Systems
鈥?High Node Count Systems
鈥?Field Bus Networks
鈥?Security Camera Networks
鈥?Building Environmental Control/ Lighting Systems
鈥?Industrial/Process Control Networks
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
ISL83070E
ISL83071E
ISL83072E
ISL83073E
ISL83075E
ISL83076E
ISL83077E
ISL83078E
HALF/FULL DATA RATE SLEW-RATE
DUPLEX
(Mbps)
LIMITED?
FULL
FULL
HALF
FULL
HALF
FULL
FULL
HALF
0.25
0.25
0.25
0.5
0.5
20
20
20
YES
YES
YES
YES
YES
NO
NO
NO
HOT
PLUG?
YES
YES
YES
YES
YES
YES
YES
YES
# DEVICES
ON BUS
256
256
256
256
256
256
256
256
RX / TX
ENABLE?
YES
NO
YES
YES
YES
YES
NO
YES
QUIESCENT
I
CC
(碌A)
510
510
510
510
510
510
510
510
LOW POWER
SHUTDOWN?
YES
NO
YES
YES
YES
YES
NO
YES
PIN
COUNT
14
8
8
14
8
14
8
8
1
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 Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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