74AHC595; 74AHCT595

8-bit serial-in/serial-out or parallel-out shift register with output latches

The 74AHC595; 74AHCT595 is an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs. Both the shift and storage register have separate clocks. The device features a serial input (DS) and a serial output (Q7S) to enable cascading and an asynchronous reset MR input. A LOW on MR will reset the shift register. Data is shifted on the LOW-to-HIGH transitions of the SHCP input. The data in the shift register is transferred to the storage register on a LOW-to-HIGH transition of the STCP input. If both clocks are connected together, the shift register will always be one clock pulse ahead of the storage register. Data in the storage register appears at the output whenever the output enable input (OE) is LOW. A HIGH on OE causes the outputs to assume a high-impedance OFF-state. Operation of the OE input does not affect the state of the registers. The 74AHCT595 features TTL compatible inputs. Both 74AHC595 and 74AHCT595 inputs are overvoltage tolerant. This feature allows the use of these devices as translators in mixed voltage environments.

Features and benefits

  • Wide supply voltage range from 2.0 V to 5.5 V
  • Balanced propagation delays
  • All inputs have Schmitt-trigger action
  • Overvoltage tolerant inputs to 5.5 V
  • High noise immunity
  • CMOS low power dissipation
  • 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
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C


  • 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 numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT763-1Reel 7” Q1/T1 or Q2/T3ActiveAHC59574AHC595BQ,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/T1 or Q2/T3ActiveAHT59574AHCT595BQ,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 (9)

    File nameTitleTypeDate
    74AHC_AHCT5958-bit serial-in/serial-out or parallel-out shift register with output latchesData sheet2020-05-26
    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 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
    ahct595ahct595 IBIS modelIBIS model2013-04-07
    ahc595ahc595 IBIS modelIBIS model2013-04-07


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