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參數資料
| 型號： | ISL84391 |
| 英文描述： | 3.3V. Low Power. Slew Rate Limited. RS-485/RS-422 Transeivers |
| 中文描述： | 3.3。低功耗。轉換率受限的。 RS-485/RS-422收發Transeivers |
| 文件頁數： | 1/17頁 |
| 文件大小： | 533K |
| 代理商： | ISL84391 |
1
FN6052.1
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
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 I
CC
(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
September 2003
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. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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