ST485ERB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 ST485ERB 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 (HBM) ± 8 kV (IEC-1000-4-2 contact discharge) shocks, without latch-up. These parts contain one driver and one receiver.

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.

The driver is a short-circuit current which is limited and protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state.

The ST485ERB is designed for bi-directional data communication on multipoint bus transmission lines (half-duplex applications).

特性 Features

• Low quiescent current: 300 µA
• Designed for RS-485 interface applications
• - 7 V to 12 V common mode input voltage range
• Driver maintains high impedance in 3-state or with the power OFF
• 70 mV typical input hysteresis
• 30 ns propagation delay, 5 ns skew
• Operates from a single 5 V supply
• Current limiting and thermal shutdown for driver overload protection
• ESD protection:
•± 15 kV (HBM)
•± 8 kV (IEC-1000-4-2 contact discharge)
• Allows up to 64 transceivers on the bus

简介

ST485ERB属于集成电路（IC）的驱动器接收器收发器。由制造生产的ST485ERB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。