74AHC164; 74AHCT164

8-bit serial-in/parallel-out shift register

The 74AHC164; 74AHCT164 shift register is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard No. 7A.

The 74AHC164; 74AHCT164 input signals are 8-bit serial through one of two inputs (DSA or DSB); either input can be used as an active HIGH enable for data entry through the other input. Both inputs must be connected together or an unused input must be tied HIGH.

Data shifts one place to the right on each LOW-to-HIGH transition of the clock input (CP) and enters into output Q0, which is a logical AND of the two data inputs (DSA and DSB) that existed one set-up time prior to the rising clock edge.

A LOW-level on the master reset (MR) input overrides all other inputs and clears the register asynchronously, forcing all outputs LOW.


  • Balanced propagation delays
  • All inputs have Schmitt-trigger actions
  • Inputs accept voltages higher than VCC
  • Input levels:
    • For 74AHC164: CMOS level
    • For 74AHCT164: TTL level
  • ESD protection:
    • HBM EIA/JESD22-A114E exceeds 2000 V
    • MM EIA/JESD22-A115-A exceeds 200 V
    • CDM EIA/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)fmax (MHz)No of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74AHC164BQProduction2.0 - 5.5CMOS± 84.51158low-40~12510318.270DHVQFN14
74AHC164DProduction2.0 - 5.5CMOS± 84.51158low-40~12510417.662SO14
74AHC164PWProduction2.0 - 5.5CMOS± 84.51158low-40~1251386.964TSSOP14
74AHCT164BQProduction4.5 - 5.5TTL± 83.41158low-40~12510318.270DHVQFN14
74AHCT164DProduction4.5 - 5.5TTL± 83.41158low-40~12510417.662SO14
74AHCT164PWProduction4.5 - 5.5TTL± 83.41158low-40~1251386.964TSSOP14


Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT762-1Reel 7" Q1/T1ActiveAC16474AHC164BQ,115
( 9352 833 93115 )
Reel 13" Q1/T1Active74AHC164D74AHC164D,118
( 9352 654 65118 )
Bulk PackActive74AHC164D74AHC164D,112
( 9352 654 65112 )
Reel 13" Q1/T1ActiveAHC16474AHC164PW,118
( 9352 654 66118 )
SOT762-1Reel 7" Q1/T1ActiveAT16474AHCT164BQ,115
( 9352 833 94115 )
Reel 13" Q1/T1Active74AHCT164D74AHCT164D,118
( 9352 654 63118 )
Reel 13" Q1/T1ActiveAHCT16474AHCT164PW,118
( 9352 654 64118 )

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
        74AHC164BQ74AHC164BQ,11574AHC164BQAlways Pb-free84.96.621.51E811
        74AHC164D74AHC164D,11874AHC164Dweek 32, 200484.96.621.51E811
        74AHC164D74AHC164D,11274AHC164Dweek 32, 200484.96.621.51E811
        74AHC164PW74AHC164PW,11874AHC164PWweek 10, 200584.96.621.51E811
        74AHCT164BQ74AHCT164BQ,11574AHCT164BQAlways Pb-free84.96.621.51E811
        74AHCT164D74AHCT164D,11874AHCT164Dweek 32, 200484.96.621.51E811
        74AHCT164PW74AHCT164PW,11874AHCT164PWweek 10, 200584.96.621.51E811
        Quality and reliability disclaimer

        Documentation (16)

        File nameTitleTypeDate
        74AHC_AHCT1648-bit serial-in/parallel-out shift registerData sheet2017-07-20
        ahct164ahct164 IBIS modelIBIS model2013-04-07
        ahc164ahc164 IBIS modelIBIS model2013-04-07
        SOT762-1_471DHVQFN14; Reel sulfur barrier pack, SMD, 7" Q1/T1 standard product orientation Orderable part number ending ,471 or Z Ordering code (12NC) ending 471Packing2016-01-21
        SOT762-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 14 terminals; 0.5 mm pitch; 3 mm x 2.5 mm x 1 mm bodyOutline drawing2018-11-14
        SOT762-1_115DHVQFN14; Reel pack for SMD, 7"; Q1/T1 product orientationPacking2020-02-13
        SOT402-1_623TSSOP14; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 623 or XP; Ordering code (12NC) ending 623Packing2013-05-15
        SOT402-1_653TSSOP14; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 653 or HL; Ordering code (12NC) ending 653Packing2013-05-15
        SOT402-1plastic, thin shrink small outline package; 14 leads; 0.65 mm pitch; 5 mm x 4.4 mm x 1.1 mm bodyOutline drawing2018-10-18
        SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
        SOT402-1_118TSSOP14; Reel pack for SMD, 13"; Q1/T1 product orientationPacking2019-11-29
        SOT108-1_431SO14; Reel sulfur barrier pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,431 or Z Ordering code (12NC) ending 431Packing2016-11-24
        SOT108-1plastic, small outline package; 14 leads; 1.27 mm pitch; 8.65 mm x 3.9 mm x 1.75 mm bodyOutline drawing2018-10-18
        SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
        SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
        SOT108-1_118SO14; Reel pack for SMD, 13"; Q1/T1 product orientationPacking2020-02-14


        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
        ahct164ahct164 IBIS modelIBIS model2013-04-07
        ahc164ahc164 IBIS modelIBIS model2013-04-07


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