74HC157PW

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74HC157PW 数据手册

74HC157; 74HCT157

Quad 2-input multiplexer

Rev. 3 — 31 December 2010

Product data sheet

1. General description

The 74HC157; 74HCT157 is a high-speed Si-gate CMOS device and is pin compatible

with Low-power Schottky TTL. It is specified in compliance with JEDEC standard no. 7A.

The 74HC/HCT157 are quad 2-input multiplexers which select 4 bits of data from two

sources under the control of a common data select input (S). The enable input (E) is

active LOW. When E is HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of

all other input conditions.

Moving the data from two groups of registers to four common output buses is a common

use of the 74HC/HCT157. The state of the common data select input (S) determines the

particular register from which the data comes. It can also be used as function generator.

The device is useful for implementing highly irregular logic by generating any four of the

16 different functions of two variables with one variable common. The 74HC/HCT157 is

logic implementation of a 4-pole, 2-position switch, where the position of the switch is

determine by the logic levels applied to S.

The logic equations are:

1Y = E (1I1 S + 1I0 S)

2Y = E (2I1 S + 2I0 S)

3Y = E (3I1 S + 3I0 S)

4Y = E (4I1 S + 4I0 S)

The 74HC/HCT157 is identical to the 74HC158 but has non-inverting (true) outputs.

2. Features and benefits

 Low-power dissipation

 Non-inverting data path

 ESD protection:

 HBM JESD22-A114F exceeds 2 000 V

 MM JESD22-A115-A exceeds 200 V

 Specified from 40 C to +85 C and from 40 C to +125 C

12 3 4 5 6 7...18

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型号	品牌	替代类型	描述	数据表
MC74VHC257DTR2G	ONSEMI	完全替代	暂无描述

型号	品牌	获取价格	描述	数据表
74HC157PW-Q100	NEXPERIA	获取价格	Quad 2-input multiplexer
74HC157-Q100	NEXPERIA	获取价格	Quad 2-input multiplexer
74HC158	HARRIS	获取价格	High Speed CMOS Logic Quad 2-Input Multiplexers
74HC158	NXP	获取价格	Quad 2-input multiplexer; inverting
74HC158D	NXP	获取价格	Quad 2-input multiplexer; inverting
74HC158D/N,118	NXP	获取价格	74HC158 - Quad 2-input multiplexer; inverting SOP 16-Pin
74HC158DB-T	NXP	获取价格	IC HC/UH SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, INVERTED OUTPUT, PDSO16, Multiplexer/D
74HC158D-T	PHILIPS	获取价格	Multiplexer, 4-Func, 2 Line Input, CMOS, PDSO16
74HC158N	NXP	获取价格	Quad 2-input multiplexer; inverting
74HC158NB	NXP	获取价格	HC/UH SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, INVERTED OUTPUT, PDIP16