Octal D-type transparant latch; 3-state

The 74AHC373 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. 7-A.

The 74AHC373 consists of eight D-type transparent latches featuring separate D-type inputs for each latch and 3-state true outputs for bus oriented applications. A latch enable input (LE) and an output enable input (OE) are common to all latches.

When pin LE is HIGH, data at the Dn inputs enters the latches. In this condition the latches are transparent, i.e. a latch output will change state each time its corresponding Dn input changes. When pin LE is LOW, the latches store the information that is present at the Dn inputs, after a set-up time preceding the HIGH-to-LOW transition of LE.

When pin OE is LOW, the contents of the 8 latches are available at the outputs. When pin OE is HIGH, the outputs go to the high-impedance OFF-state. Operation of the OE input does not affect the state of the latches.

The 74AHC373 is functionally identical to the 74AHC573; 74AHCT573, but has a different pin arrangement.


  • Balanced propagation delays
  • All inputs have a Schmitt-trigger action
  • Common 3-state output enable input
  • Inputs accepts voltages higher than VCC
  • Functionally identical to the 74AHC573; 74AHCT573
  • Input levels at CMOS input 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
  • 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)No of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74AHC373DProduction2.0 - 5.5CMOS± 84.38low-40~1258427.061SO20
74AHC373PWProduction2.0 - 5.5CMOS± 84.38low-40~1251004.544.5TSSOP20


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT163-1Reel 13" Q1/T1Active74AHC373D74AHC373D,118
( 9352 626 51118 )
Bulk PackActive74AHC373D74AHC373D,112
( 9352 626 51112 )
Reel 13" Q1/T1ActiveAHC37374AHC373PW,118
( 9352 626 52118 )

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
    74AHC373D74AHC373D,11874AHC373Dweek 30, 200484.96.621.51E811
    74AHC373D74AHC373D,11274AHC373Dweek 30, 200484.96.621.51E811
    74AHC373PW74AHC373PW,11874AHC373PWweek 5, 200584.96.621.51E811
    Quality and reliability disclaimer

    Documentation (5)

    File nameTitleTypeDate
    74AHC373Octal D-type transparent latch; 3-stateData sheet2019-03-05
    ahc373ahc373 IBIS modelIBIS model2013-04-07
    SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
    SOT360-1plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm bodyPackage information2020-04-21
    SOT163-1plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 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
    ahc373ahc373 IBIS modelIBIS model2013-04-07

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