74HC157BQ: Quad 2-input multiplexer

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.

Outline 3d SOT763-1
Data Sheets (1)
Name/DescriptionModified Date
Quad 2-input multiplexer (REV 8.0) PDF (195.0 kB) 74HC_HCT157 [English]28 Dec 2015
Application Notes (1)
Name/DescriptionModified Date
Live Insertion Aspects of Philips Logic Families (REV 1.0) PDF (73.0 kB) AN252 [English]13 Mar 2013
Package Information (1)
Name/DescriptionModified Date
plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 16 terminals; body 2.5 x 3.5 x... (REV 1.1) PDF (191.0 kB) SOT763-1 [English]30 May 2016
Packing (1)
Name/DescriptionModified Date
DHVQFN16; Reel pack, SMD, 7" Q1/T1 standard product orientation Orderable part number ending ,115 or... (REV 2.0) PDF (191.0 kB) SOT763-1_115 [English]05 Jul 2016
IBIS Model
Ordering Information
ProductStatusFamilyVCC (V)FunctionLogic switching levelsDescriptionOutput drive capability (mA)Package versiontpd (ns)Power dissipation considerationsTamb (Cel)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package nameNo of pins
74HC157BQActiveHC(T)2.0 - 6.0Digital multiplexersCMOSquad 2-input multiplexer+/- 5.2SOT763-111low-40~1259213.161DHVQFN1616
Package Information
Product IDPackage DescriptionOutline VersionReflow/Wave SolderingPackingProduct StatusPart NumberOrdering code(12NC)MarkingChemical ContentRoHS / Pb Free / RHFLeadFree Conversion DateEFRIFR(FIT)MTBF(hour)MSLMSL LF
74HC157BQSOT763-1Reel 7" Q1/T1Active74HC157BQ,115 (9352 944 23115)HC15774HC157BQAlways Pb-free84.96.621.51E811
Quad 2-input multiplexer 74HCT157PW
Live Insertion Aspects of Philips Logic Families 74HC_T_245_Q100
74HC157 IBIS model 74HC157PW
plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 16 terminals; body 2.5 x 3.5 x... NPIC6C596A_Q100
DHVQFN16; Reel pack, SMD, 7" Q1/T1 standard product orientation Orderable part number ending ,115 or... NPIC6C596A_Q100
TFF1024HN