SN74LVC257A-Q1中文资料德州仪器数据手册PDF规格书

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.