Datasheet > ST491A_07

ST491A_07

更新时间： 2024-11-27 03:30:55

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
17页	240K
描述
Low power high speed RS-485/RS-422 transceiver

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ST491A_07 数据手册

ST491A

Low power high speed

RS-485/RS-422 transceiver

Features

■ Low supply current: 5mA max

■ Designed for RS485 interface applications

■ -7V to 12V common mode input voltage range

■ 70mV typical input hysteresis

■ Designed for 25Mbps operation

DIP-14

■ Operate from a single 5V supply

■

4kV ESD protection

■ Current limiting and thermal shutdown for

driver overload protection

Description

The ST491A is a low power transceiver for RS-

485 and RS-422 communications. The device

contains one driver and one receiver in full duplex

configuration. The ST491A draws 5mA (typ.) of

supply current when unloaded and operates from

a single 5V supply.

Driver is short-circuit current limited and is

protected against excessive power dissipation by

thermal shutdown circuitry that place the driver

outputs into a high-impedance state. The receiver

input has a fail-safe feature that guarantees a

logic high output if both inputs are open circuit.

Order code

Part number

Temperature range

Package

Packaging

ST491ACN

0 to 70 °C

DIP-14

25parts per tube / 40tube per box

May 2007

Rev 6

1/17

www.st.com

12 3 4 5 6 7...17

中文翻译

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