ST485B中文资料低功耗RS-485/RS-422收发器，温度范围[-40℃, 85℃]数据手册ST规格书

描述 Description

The ST485 is al low power transceiver for RS-485 and RS-422 communication. Each part contains one driver and one receiver.

This transceiver draw 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 placed the driver outputs into a high-impedance state.

The ST485 is designed for bi-directional data communications on multipoint bus transmission line (half-duplex applications).

The ST485 is available in three temperature range: commercial (0 °C to 70 °C), industrial (- 40 °C to 85 °C) and automotive (- 55 °C to 125 °C).

特性 Features

• Operate from a single 5 V supply
• 30 ns propagation delay, 5 ns skew
• Allows up to 64 transceivers on the bus
• 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

ST485B属于集成电路（IC）的驱动器接收器收发器。由制造生产的ST485B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。