74HC157 74HCT157 Quad 2-input multiplexer Rev. 8 28 December 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 Complies with JEDEC standard no. 7A Input levels: For 74HC157: CMOS level For 74HCT157: TTL level 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 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 6 ( , , , , , , , , , , , , 6 ( , < < , PQ D PQ 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. 8 28 December 2015 2 of 18 D < < < < < , < ,