TC74HC257AP/AF/AFN

2007-10-01

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74HC257AP,TC74HC257AF,TC74HC257AFN

Quad 2-Channel Multiplexer (3-state)

The TC74HC257A is high speed CMOS MULTIPLEXER

It achieves the high speed operation similar to equivalent

LSTTL while maintaining the CMOS low power dissipation.

It is composed of four independent 2-channel multiplexers with

common SELECT and

ENABLE

OUTPUT

( OE ).

If OE is set low, the outputs are held in a high-impedance

state. When SELECT is set low, “A” data inputs are enabled.

Conversely, when SELECT is high, “B” data inputs are

enabled.

All inputs are equipped with protection circuits against static

discharge or transient excess voltage.

Features

• Output drive capability: 15 LSTTL loads

•

• Pin and function compatible with 74LS257

Pin Assignment

Note: xxxFN (JEDEC SOP) is not available in

Japan.

TC74HC257AP

TC74HC257AF

TC74HC257AFN

Weight

DIP16-P-300-2.54A

: 1.00 g (typ.)

SOP16-P-300-1.27A

: 0.18 g (typ.)

SOL20-P-150-1.27

: 0.13 g (typ.)