DS8921中文資料差動線路驅動器和接收器對數(shù)據(jù)手冊TI規(guī)格書

描述 Description

The DS8921, DS8921A, and DS8921AT devices are differential line driver and receiver pairs designed specifically for applications meeting the ST506, ST412, and ESDI disk drive standards. In addition, these devices meet the requirements of the EIA standard RS-422.
The DS8921x receivers offer an input sensitivity of 200 mV over a &plsumn;7 V common mode operating range. Hysteresis is incorporated (typically 70 mV) to improve noise margin for slowly changing input waveforms.
The DS8921x 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 (typical) with propagation delays of 12?ns.
The DS8921x devices 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 ±7 V
? ±0.2 V Receiver Sensitivity Over the Input Voltage Range
? Receiver Input Hysteresis: 70 mV Typical
? DS8921AT Industrial Temperature Operation: (?40°C to +85°C)

簡介

DS8921屬于集成電路（IC）的驅動器接收器收發(fā)器。由TI制造生產的DS8921驅動器，接收器，收發(fā)器該系列產品的主要功能是提供必需的硬件資源，以通過延長電纜或印制線進行通信。確切的功能會因所采用的通信協(xié)議而異，可能包括諸如瞬態(tài)抑制之類的功能，這些功能對于通信用途可能并非絕對必要，但對于可能的使用環(huán)境卻是明智之選。