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74HC157_10

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74HC157_10 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	获取价格	描述	数据表
74HC157BQ	NXP	获取价格	Quad 2-input multiplexer
74HC157BQ	NEXPERIA	获取价格	Quad 2-input multiplexerProduction
74HC157BQ-Q100	NXP	获取价格	HC/UH SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PQCC16, 2.50 X 3.50 MM, 0.85
74HC157BQ-Q100	NEXPERIA	获取价格	Quad 2-input multiplexer
74HC157D	NEXPERIA	获取价格	Quad 2-input multiplexerProduction
74HC157D	NXP	获取价格	Quad 2-input multiplexer
74HC157D	TOSHIBA	获取价格	Not Recommended for New Design
74HC157D/T3	NXP	获取价格	IC HC SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, SOT-109, SOP-16, Mul
74HC157DB	NXP	获取价格	Quad 2-input multiplexer
74HC157DB,112	NXP	获取价格	暂无描述