DS8921集成電路（IC）的驅(qū)動(dòng)器接收器收發(fā)器規(guī)格書(shū)PDF中文資料

DS8921屬于集成電路（IC）的驅(qū)動(dòng)器接收器收發(fā)器。由德州儀器制造生產(chǎn)的DS8921驅(qū)動(dòng)器，接收器，收發(fā)器該系列產(chǎn)品的主要功能是提供必需的硬件資源，以通過(guò)延長(zhǎng)電纜或印制線進(jìn)行通信。確切的功能會(huì)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(duì)于通信用途可能并非絕對(duì)必要，但對(duì)于可能的使用環(huán)境卻是明智之選。

1 Features

1? 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)

2 Applications

? Differential Line Driver and Receiver for:

– ST506 Disk Drive Standard

– ST412 Disk Drive Standard

– ESDI Disk Drive Standard

– RS-422 Interface

3 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 ±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.