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ISL83483_04 Datasheet(PDF) 1 Page - Intersil Corporation

Part No. ISL83483_04
Description  3.3V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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1
®
FN6052.3
ISL83483, ISL83485, ISL83488,
ISL83490, ISL83491
3.3V, Low Power, High Speed or Slew Rate
Limited, RS-485/RS-422 Transceivers
These Intersil RS-485/RS-422 devices are BiCMOS 3.3V
powered, single transceivers that meet both the RS-485 and
RS-422 standards for balanced communication. Unlike
competitive devices, this Intersil family is specified for 10%
tolerance supplies (3V to 3.6V).
The ISL83483 and ISL83488 utilize slew rate limited drivers
which reduce EMI, and minimize reflections from improperly
terminated transmission lines, or unterminated stubs in
multidrop and multipoint applications.
Data rates up to 10Mbps are achievable by using the
ISL83485, ISL83490, or ISL83491, which feature higher
slew rates.
Logic inputs (e.g., DI and DE) accept signals in excess of
5.5V, making them compatible with 5V logic families.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high output if Rx inputs are floating. All
devices present a “single unit load” to the RS-485 bus, which
allows up to 32 transceivers on the network.
Driver (Tx) outputs are short circuit protected, even for
voltages exceeding the power supply voltage. Additionally,
on-chip thermal shutdown circuitry disables the Tx outputs to
prevent damage if power dissipation becomes excessive.
The ISL83488, ISL83490, ISL83491 are configured for full
duplex (separate Rx input and Tx output pins) applications.
The ISL83488 and ISL83490 are offered in space saving 8
lead packages for applications not requiring Rx and Tx
output disable functions (e.g., point-to-point and RS-422).
Half duplex configurations (ISL83483, ISL83485) multiplex
the Rx inputs and Tx outputs to provide transceivers with Rx
and Tx disable functions in 8 lead packages.
Features
• Operate from a Single +3.3V Supply (10% Tolerance)
• Interoperable with 5V Logic
• High Data Rates . . . . . . . . . . . . . . . . . . . . . up to 10Mbps
• Single Unit Load Allows up to 32 Devices on the Bus
• Slew Rate Limited Versions for Error Free Data
Transmission (ISL83483, ISL83488) . . . . . .up to 250kbps
• Low Current Shutdown Mode (ISL83483, ISL83485,
ISL83491). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15nA
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs (Except ISL83488,
ISL83490)
• 10ns Propagation Delay, 1ns Skew (ISL83485, ISL83490,
ISL83491)
• Full Duplex and Half Duplex Pinouts
• Current Limiting and Thermal Shutdown for driver
Overload Protection
Pb-free available
Applications
• Factory Automation
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
• Level Translators (e.g., RS-232 to RS-422)
• RS-232 “Extension Cords”
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED?
RECEIVER/DRIVER
ENABLE?
QUIESCENT ICC
(mA)
LOW POWER
SHUTDOWN?
PIN COUNT
ISL83483
Half
0.25
Yes
Yes
0.65
Yes
8
ISL83485
Half
10
No
Yes
0.65
Yes
8
ISL83488
Full
0.25
Yes
No
0.65
No
8
ISL83490
Full
10
No
No
0.65
No
8
ISL83491
Full
10
No
Yes
0.65
Yes
14
Data Sheet
August 2004
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003, 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.




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