74HC157; 74HCT157
Quad 2-input multiplexer
Rev. 7 21 January 2015 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
determined 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 Cto+85 C and from 40 Cto+125 C74HC157; 74HCT157
NXP Semiconductors
Quad 2-input multiplexer
3. Ordering information
Table 1. Ordering information
Type number Package
Temperature range Name Description Version
74HC157N 40 C to +125 C DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4
74HCT157N
74HC157D 40 C to +125 C SO16 plastic small outline package; 16 leads; body width SOT109-1
3.9 mm
74HCT157D
74HC157DB 40 C to +125 C SSOP16 plastic shrink small outline package; 16 leads; SOT338-1
body width 5.3 mm
74HCT157DB
74HC157PW 40 C to +125 C TSSOP16 plastic thin shrink small outline package; 16 leads; SOT403-1
body width 4.4 mm
74HCT157PW
74HC157BQ 40 C to +125 C DHVQFN16 plastic dual in-line compatible thermal enhanced very SOT763-1
thin quad flat package; no leads; 16 terminals;
74HCT157BQ
body 2.5 3.5 0.85 mm
4. Functional diagram
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Fig 1. Logic diagram Fig 2. logic symbol
74HC_HCT157 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 7 21 January 2015 2 of 19
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