DS8923A中文资料三态 RS-422 双路差动线路驱动器和接收器对数据手册TI规格书

描述 Description

The DS8922/22A and DS8923A are Dual Differential Line Driver and Receiver pairs. These devices are designed specifically for applications meeting the ST506, ST412 and ESDI Disk Drive Standards. In addition, the devices meet the requirements of the EIA Standard RS-422.These devices offer an input sensitivity of 200 mV over a ±7V common mode operating range. Hysteresis is incorporated (typically 70 mV) to improve noise margin for slowly changing input waveforms. An input fail-safe circuit is provided such that if the receiver inputs are open the output assumes the logical one state.The DS8922A and DS8923A drivers are designed to provide unipolar differential drive to twisted pair or parallel wire transmission lines. Complementary outputs are logically ANDed and provide an output skew of 0.5 ns (typ.) with propagation delays of 12 ns.Both devices feature TRI-STATE outputs. The DS8922/22A have independent control functions common to a driver and receiver pair. The DS8923A has separate driver and receiver control functions.Power up/down circuitry is featured which will TRI-STATE the outputs and prevent erroneous glitches on the transmission lines during system power up or power down operation. The DS8922/22A and DS8923A are designed to be compatible with TTL and CMOS.

特性 Features

·12 ns Typical Propagation Delay
·Output Skew—±0.5 ns Typical
·Meets the Requirements of EIA Standard RS-422
·Complementary Driver Outputs
·High Differential or Common-Mode Input Voltage Ranges of ±7V
·±0.2V Receiver Sensitivity over the Input Voltage Range
·Receiver Input Fail-Safe Circuitry
·Receiver Input Hysteresis—70 mV typical
·Glitch Free Power Up/Down
·TRI-STATE Outputs
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简介

DS8923A属于集成电路（IC）的驱动器接收器收发器。由TI制造生产的DS8923A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。