SN74LVC257A-Q1中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

1 Features

? Operate from 1.65V to 3.6V

? Inputs accept voltages to 5.5V

? Maximum tpd of 4.6ns at 3.3V

? Typical VOLP (output ground bounce)

<0.8V at VCC = 3.3V, TA = 25°C

? Typical VOHV (output VOH undershoot)

>2V at VCC = 3.3V, TA = 25°C

? Latch-up performance exceeds 250mA per JESD

17

? ESD protection exceeds JESD 22

– 2000V human-body model (A114-A)

– 200V machine model (A115-A)

? On products compliant to MIL-PRF-38535, all

parameters are tested unless otherwise noted. On

all other products, production processing does not

necessarily include testing of all parameters.

2 Applications

? Cable Modem Termination Systems

? Tests and Measurements

? I/O Expanders

? Motor Drivers

? Network Switches

? Servers

? Telecom Infrastructure

3 Description

These quadruple 2-line to 1-line data selectors and

multiplexers are designed for 1.65V to 3.6V VCC

operation.

The SNx4LVC257A devices are designed to multiplex

signals from 4-bit data sources to 4-output data lines

in bus-organized systems. The 3-state outputs do not

load the data lines when the output-enable ( OE) input

is at a high logic level.

Inputs can be driven from either 3.3V or 5V devices.

This feature allows the use of these devices as

translators in a mixed 3.3V or 5V system

environment.