Octal D-type flip-flop with data enable; positive-edge trigger

The 74AHC377; 74AHCT377 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 74AHC377; 74AHCT377 has eight edge-triggered, D-type flip-flops with individual D inputs and Q outputs. A common clock input (CP) loads all flip-flops simultaneously when the data enable input (E) is LOW. The state of each D input, one set-up time before the LOW-to-HIGH clock transition, is transferred to the corresponding output (Qn) of the flip-flop. The E input is only required to be stable one set-up time prior to the LOW-to-HIGH transition for predictable operation.

For versions associated with the 74AHC377; 74AHCT377, refer to the following:

  • For the master reset version, see 74AHC273; 74AHCT273
  • For the transparent latch version, see 74AHC373; 74AHCT373
  • For the 3-state version, see 74AHC374; 74AHCT374


  • Balanced propagation delays
  • All inputs have Schmitt-trigger actions
  • Inputs accept voltages higher than VCC
  • Ideal for addressable register applications
  • Data enable for address and data synchronization
  • Eight positive-edge triggered D-type flip-flops
  • Input levels:
    • For 74AHC377: CMOS level
    • For 74AHCT377: 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)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74AHC377DProduction2.0 - 5.5CMOS± 83.9175low-40~1258527.461SO20
74AHC377PWProduction2.0 - 5.5CMOS± 83.9175low-40~1251004.644.8TSSOP20
74AHCT377DProduction4.5 - 5.5TTL± 84.0140low-40~1258527.461SO20
74AHCT377PWProduction4.5 - 5.5TTL± 84.0140low-40~1251004.644.8TSSOP20


Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT163-1Reel 13" Q1/T1Active74AHC377D74AHC377D,118
( 9352 679 94118 )
Reel 13" Q1/T1ActiveAHC37774AHC377PW,118
( 9352 679 95118 )
Bulk PackActiveAHC37774AHC377PW,112
( 9352 679 95112 )
SOT163-1Reel 13" Q1/T1Active74AHCT377D74AHCT377D,118
( 9352 679 92118 )
Reel 13" Q1/T1ActiveAHCT37774AHCT377PW,118
( 9352 679 93118 )

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
        74AHC377D74AHC377D,11874AHC377Dweek 30, 200484.96.621.51E811
        74AHC377PW74AHC377PW,11874AHC377PWweek 7, 200584.96.621.51E811
        74AHC377PW74AHC377PW,11274AHC377PWweek 7, 200584.96.621.51E811
        74AHCT377D74AHCT377D,11874AHCT377Dweek 30, 200484.96.621.51E811
        74AHCT377PW74AHCT377PW,11874AHCT377PWweek 7, 200584.96.621.51E811
        Quality and reliability disclaimer

        Documentation (11)

        File nameTitleTypeDate
        74AHC_AHCT377Octal D-type flip-flop with data enable; positive-edge triggerData sheet2017-07-20
        ahc377ahc377 IBIS modelIBIS model2013-04-07
        ahct377ahct377 IBIS modelIBIS model2013-04-07
        nexperia_selection_guide_2019_201901Selection guide 2019. Discretes, Logic and MOSFETsSelection guide2018-12-12
        SOT360-1_118TSSOP20; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-15
        SOT360-1plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm bodyOutline drawing2018-10-18
        SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
        SOT163-1_115Tape reel SMD; standard product orientation 12NC ending 115Packing2013-04-25
        SOT163-1_118SO20; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-15
        SOT163-1_518SO20; Reel dry pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518Packing2014-12-16
        SOT163-1plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm bodyOutline drawing2018-10-18


        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
        ahc377ahc377 IBIS modelIBIS model2013-04-07
        ahct377ahct377 IBIS modelIBIS model2013-04-07

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