74LVXZ161284中文資料仙童半導體數(shù)據(jù)手冊PDF規(guī)格書

General Description

The LVXZ161284 contains eight bidirectional data buffers and eleven control/status buffers to implement a full IEEE 1284 compliant interface. The device supports the IEEE 1284 standard and is intended to be used in an Extended Capabilities Port mode (ECP). The pinout allows for easy connection from the Peripheral (A-side) to the Host (cable side).

Features

■ Supports IEEE 1284 Level 1 and Level 2 signaling standards for bidirectional parallel communications between personal computers and printing peripherals

■ Translation capability allows outputs on the cable side to interface with 5V signals

■ All inputs have hysteresis to provide noise margin

■ B and Y output resistance optimized to drive external cable

■ B and Y outputs in high impedance mode during power down

■ C inputs and B, Y outputs on cable side have internal 1.4 k? pull-up resistors

■ Flow-through pin configuration allows easy interface between the “Peripheral and Host”

■ Replaces the function of two (2) 74ACT1284 devices

■ Power-up protection prevents errors when the printer is powered on but no valid signal is at the input pins (A9 - A13).