ST490AB中文资料低功耗全双工高速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 ST490A is a low power transceiver for RS485 and RS-422 communications. The device contains one driver and one receiver in full duplex configuration. The ST490A draws 5mA (typ.) of supply current when unloaded or fully loaded with disabled drivers. It 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.

特性 Features

• Current limiting and thermal shutdown for driver overload protection
• ±4 kV ESD protection
• Low supply current: 5mA max
• 70mV typical input hysteresis
• -7V to 12V common mode input voltage range
• Operate from a single 5 V supply
• Designed for 25Mbps operation

简介

ST490AB属于集成电路（IC）的驱动器接收器收发器。由制造生产的ST490AB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。