Important notice
Dear Customer,
On 7 February 2017 the former NXP Standard Product business became a new company with the
tradename Nexperia. Nexperia is an industry leading supplier of Discrete, Logic and PowerMOS
semiconductors with its focus on the automotive, industrial, computing, consumer and wearable
application markets
In data sheets and application notes which still contain NXP or Philips Semiconductors references, use
the references to Nexperia, as shown below.
Instead of
74HC158
Quad 2-input multiplexer; inverting
Rev. 4 23 December 2015 Product data sheet
1. General description
The 74HC158 is a high-speed Si-gate CMOS device and is pin compatible with low power
Schottky TTL (LSTTL). The 74HC158 is specified in compliance with JEDEC
standard no. 7A.
The 74HC158 is a quad 2-input multiplexer which select 4 bits of data from two sources
and are controlled by a common data select input (S). The four outputs present the
selected data in the inverted form. The enable input (E) is active LOW.
When E is HIGH, all the outputs (1Y to 4Y) are forced HIGH 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 74HC158. The state of S determines the particular register from which the data
comes. It can also be used as a 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 74HC158 is the logic implementation of a 4-pole, 2-position switch, where the
position of the switch is determined by the logic levels applied to S.
The logic equations for the output are:
1Y = E.(1l1.S 1l0.S)
2Y = E.(2l1.S 2l0.S)
3Y = E.(3l1.S 3l0.S)
4Y = E.(4l1.S 4l0.S)
The 74HC158 is identical to the 74HC157 but has inverting outputs.
2. Features and benefits
Low-power dissipation
Inverting data path
Complies with JEDEC standard no. 7A
ESD protection:
HBM JESD22-A114F exceeds 2 000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from 40 Cto+80 C and from 40 Cto+125 C.