74AHC595; 74AHCT595

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

The 74AHC595; 74AHCT595 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 74AHC595; 74AHCT595 are 8-stage serial shift registers with a storage register and 3-state outputs. The registers have separate clocks.

Data is shifted on the positive-going transitions of the shift register clock input (SHCP). The data in each register is transferred to the storage register on a positive-going transition of the storage register clock input (STCP). If both clocks are connected together, the shift register will always be one clock pulse ahead of the storage register.

The shift register has a serial input (DS) and a serial standard output (Q7S) for cascading. It is also provided with asynchronous reset (active LOW) for all 8 shift register stages. The storage register has 8 parallel 3-state bus driver outputs. Data in the storage register appears at the output whenever the output enable input (OE) is LOW.


  • Balanced propagation delays
  • All inputs have Schmitt-trigger action
  • Inputs accept voltages higher than VCC
  • Input levels:
    • The 74AHC595 operates with CMOS input levels
    • The 74AHCT595 operates with TTL input levels
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
    • CDM JESD22-C101E exceeds 1000 V
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Target applications

  • Serial-to-parallel data conversion
  • Remote control holding register


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
74AHC595BQProduction2.0 - 5.5CMOS± 84.01708low-40~1259011.859DHVQFN16
74AHC595DProduction2.0 - 5.5CMOS± 84.01708low-40~125908.349SO16
74AHC595PWProduction2.0 - 5.5CMOS± 84.01708low-40~1251223.951.4TSSOP16
74AHCT595BQProduction4.5 - 5.5TTL± 83.81708low-40~1259011.859DHVQFN16
74AHCT595DProduction4.5 - 5.5TTL± 83.81708low-40~125908.349SO16
74AHCT595PWProduction4.5 - 5.5TTL± 83.81708low-40~1251223.951.4TSSOP16


Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT763-1Reel 7" Q1/T1ActiveAHC59574AHC595BQ,115
( 9352 816 21115 )
Reel 13" Q1/T1Active74AHC595D74AHC595D,118
( 9352 655 67118 )
Bulk PackActive74AHC595D74AHC595D,112
( 9352 655 67112 )
Reel 13" Q1/T1ActiveAHC59574AHC595PW,118
( 9352 655 68118 )
SOT763-1Reel 7" Q1/T1ActiveAHT59574AHCT595BQ,115
( 9352 895 63115 )
Reel 13" Q1/T1Active74AHCT595D74AHCT595D,118
( 9352 655 59118 )
Bulk PackActive74AHCT595D74AHCT595D,112
( 9352 655 59112 )
Reel 13" Q1/T1ActiveAHCT59574AHCT595PW,118
( 9352 655 60118 )
Bulk PackActiveAHCT59574AHCT595PW,112
( 9352 655 60112 )

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
    74AHC595BQ74AHC595BQ,11574AHC595BQAlways Pb-free84.96.621.51E811
    74AHC595D74AHC595D,11874AHC595Dweek 35, 200484.96.621.51E811
    74AHC595D74AHC595D,11274AHC595Dweek 35, 200484.96.621.51E811
    74AHC595PW74AHC595PW,11874AHC595PWweek 10, 200584.96.621.51E811
    74AHCT595BQ74AHCT595BQ,11574AHCT595BQAlways Pb-free84.96.621.51E811
    74AHCT595D74AHCT595D,11874AHCT595Dweek 35, 200484.96.621.51E811
    74AHCT595D74AHCT595D,11274AHCT595Dweek 35, 200484.96.621.51E811
    74AHCT595PW74AHCT595PW,11874AHCT595PWweek 10, 200584.96.621.51E811
    74AHCT595PW74AHCT595PW,11274AHCT595PWweek 10, 200584.96.621.51E811
    Quality and reliability disclaimer

    Documentation (16)

    File nameTitleTypeDate
    74AHC_AHCT5958-bit serial-in/serial-out or parallel-out shift register with output latchesData sheet2017-05-03
    ahct595ahct595 IBIS modelIBIS model2013-04-07
    ahc595ahc595 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 bodyOutline drawing2018-11-14
    SOT763-1_115DHVQFN16; Reel pack, SMD, 7" Q1/T1 product orientationPacking2020-02-13
    SOT109-1_431SO16; Reel sulfur barrier pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,431 or Z Ordering code (12NC) ending 431Packing2016-08-25
    SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm bodyOutline drawing2018-10-18
    SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
    SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
    SOT109-1_118SO16; Reel pack for SMD, 13"; Q1/T1 product orientationPacking2020-02-14
    SOT403-1_118TSSOP16; Reel pack for SMD, 13"; Q1/T1 product orientationPacking2020-02-14
    SOT403-1_623TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 623 or HL; Ordering code (12NC) ending 623Packing2013-05-15
    SOT403-1_128TSSOP16; Reel pack; SMD, 13", Turned Q4/T2 180 deg product orientation Orderable part number ending ,128 or HP Ordering code (12NC) ending 128Packing2014-10-14
    SOT403-1_653TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 653 or HL; Ordering code (12NC) ending 653Packing2013-05-15
    SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyOutline drawing2018-11-14
    SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08


    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
    ahct595ahct595 IBIS modelIBIS model2013-04-07
    ahc595ahc595 IBIS modelIBIS model2013-04-07


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