ST485EX数据手册集成电路（IC）的驱动器接收器收发器规格书PDF

描述 Description

The ST485E is a low power transceiver for RS-485 and RS-422 communication. Each driver output and receiver input is protected against ±15 kV electrostatic discharge (H.B.M.) (ESD) shocks, without latch-up. These parts contain one driver and one receiver in half duplex configuration.

This transceiver draws 300 µA (typ.) of supply current when unloaded or fully loaded with disabled drivers.

It operates from a single 5 V 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 ST485E is designed for bi-directional data communications on multipoint bus transmission lines (half-duplex applications).

特性 Features

• Allows up to 256 transceivers on the bus
• ESD protection: ±15 kV (H.B.M.) ±8 kV (IEC-1000-4-2 contact discharge)
• Operates from a single 5 V supply
• 30 ns propagation delay, 5 ns skew
• Low quiescent current: 300 µA
• -7 V to 12 V common mode input voltage range
• Designed for RS-485 interface application
• 70 mV typical input hysteresis
• Current limiting and thermal shutdown for driver overload protection
• Driver maintains high impedance in 3-state or with the power OFF

简介

ST485EX属于集成电路（IC）的驱动器接收器收发器。由制造生产的ST485EX驱动器，接收器，收发器该系列产品的主要功能是提供必需的硬件资源，以通过延长电缆或印制线进行通信。确切的功能会因所采用的通信协议而异，可能包括诸如瞬态抑制之类的功能，这些功能对于通信用途可能并非绝对必要，但对于可能的使用环境却是明智之选。