74AHC157; 74AHCT157

Quad 2-input multiplexer

The 74AHC/AHCT157 are high-speed Si-gate CMOS devices and are pin compatible with Low Power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

The 74AHC/AHCT157 are quad 2-input multiplexer 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 74AHC/AHCT157. 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 74AHC/AHCT157 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)

Features and benefits

  • Balanced propagation delays
  • All inputs have a Schmitt-trigger action
  • Inputs accepts voltages higher than VCC
  • Multiple input enable for easy expansion
  • Ideal for memory chip select decoding
  • For 74AHC157 only: operates with CMOS input levels
  • For 74AHCT157 only: operates with TTL input levels
  • ESD protection:
    • HBM JESD22-A114E exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
    • CDM JESD22-C101C exceeds 1000 V
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C


Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74AHC157BQProduction2.0 - 5.5CMOS± 83.2low-40~1259112.760DHVQFN16
74AHC157DProduction2.0 - 5.5CMOS± 83.2low-40~125918.950SO16
74AHC157PWProduction2.0 - 5.5CMOS± 83.2low-40~1251234.253TSSOP16
74AHCT157BQProduction4.5 - 5.5TTL± 83.2low-40~1259112.760DHVQFN16
74AHCT157DProduction4.5 - 5.5TTL± 83.2low-40~125918.950SO16
74AHCT157PWProduction4.5 - 5.5TTL± 83.2low-40~1251234.253TSSOP16


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT763-1Reel 7” Q1/T1 or Q2/T3ActiveAHC15774AHC157BQ,115
( 9352 855 69115 )
Reel 13" Q1/T1Active74AHC157D74AHC157D,118
( 9352 639 98118 )
Bulk PackActive74AHC157D74AHC157D,112
( 9352 639 98112 )
Reel 13" Q1/T1ActiveAHC15774AHC157PW,118
( 9352 639 99118 )
Bulk PackActiveAHC15774AHC157PW,112
( 9352 639 99112 )
SOT763-1Reel 7” Q1/T1 or Q2/T3ActiveAHT15774AHCT157BQ,115
( 9352 855 71115 )
Reel 13" Q1/T1Active74AHCT157D74AHCT157D,118
( 9352 640 00118 )
Bulk PackActive74AHCT157D74AHCT157D,112
( 9352 640 00112 )
Reel 13" Q1/T1ActiveAHCT15774AHCT157PW,118
( 9352 640 01118 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments

    Quality, reliability & chemical content

    Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
    74AHC157BQ74AHC157BQ,11574AHC157BQAlways Pb-free84.96.621.51E811
    74AHC157D74AHC157D,11874AHC157DAlways Pb-free84.96.621.51E811
    74AHC157D74AHC157D,11274AHC157DAlways Pb-free84.96.621.51E811
    74AHC157PW74AHC157PW,11874AHC157PWweek 10, 200584.96.621.51E811
    74AHC157PW74AHC157PW,11274AHC157PWweek 10, 200584.96.621.51E811
    74AHCT157BQ74AHCT157BQ,11574AHCT157BQAlways Pb-free84.96.621.51E811
    74AHCT157D74AHCT157D,11874AHCT157DAlways Pb-free84.96.621.51E811
    74AHCT157D74AHCT157D,11274AHCT157DAlways Pb-free84.96.621.51E811
    74AHCT157PW74AHCT157PW,11874AHCT157PWweek 10, 200584.96.621.51E811
    Quality and reliability disclaimer

    Documentation (9)

    File nameTitleTypeDate
    74AHC_AHCT157Quad 2-input multiplexerData sheet2020-09-10
    ahc157ahc157 IBIS modelIBIS model2013-04-07
    ahct157ahct157 IBIS modelIBIS model2013-04-07
    SOT763-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm bodyPackage information2020-04-21
    SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2021-01-06
    SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
    SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
    SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
    SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyPackage information2020-04-21


    If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.


    File nameTitleTypeDate
    ahc157ahc157 IBIS modelIBIS model2013-04-07
    ahct157ahct157 IBIS modelIBIS model2013-04-07


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