74AHC244-Q100; 74AHCT244-Q100

Octal buffer/line driver; 3-state

The 74AHC244-Q100; 74AHCT244-Q100 is an 8-bit buffer/line driver with 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Inputs are overvoltage tolerant. This feature allows the use of these devices as translators in mixed voltage environments.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.

Features and benefits

  • Automotive product qualification in accordance with AEC-Q100 (Grade 1)
    • Specified from -40 °C to +85 °C and from -40 °C to +125 °C
  • 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:
    • For 74AHC244-Q100: CMOS level
    • For 74AHCT244-Q100: TTL level
  • ESD protection:
    • MIL-STD-883, method 3015 exceeds 2000 V
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V (C = 200 pf, R = 0 Ω)
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
  • Multiple package options
  • DHVQFN package with Side-Wettable Flanks enabling Automatic Optical Inspection (AOI) of solder joints


Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)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
74AHC244BQ-Q100Production2.0 - 5.5CMOS± 8608low-40~125789.150DHVQFN20
74AHC244D-Q100Production2.0 - 5.5CMOS± 8608low-40~1258527.261SO20
74AHC244PW-Q100Production2.0 - 5.5CMOS± 8608low-40~1251004.644.7TSSOP20
74AHCT244BQ-Q100Production4.5 - 5.5TTL± 8608low-40~125789.150DHVQFN20
74AHCT244D-Q100Production4.5 - 5.5TTL± 8608low-40~1258527.261SO20
74AHCT244PW-Q100Production4.5 - 5.5TTL± 8608low-40~1251004.644.7TSSOP20


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT764-1Reel 7” Q1/T1 or Q2/T3ActiveAHC24474AHC244BQ-Q100,11
( 9352 984 33115 )
Reel 13" Q1/T1Active74AHC244D74AHC244D-Q100,118
( 9352 984 34118 )
Reel 13" Q1/T1ActiveAHC24474AHC244PW-Q100,11
( 9352 984 35118 )
SOT764-1Reel 7” Q1/T1 or Q2/T3ActiveAHCT24474AHCT244BQ-Q100,1
( 9352 984 36115 )
Reel 13" Q1/T1Active74AHCT244D74AHCT244D-Q100,11
( 9352 984 37118 )
Reel 13" Q1/T1ActiveAHCT24474AHCT244PW-Q100,1
( 9352 984 38118 )

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
    74AHC244BQ-Q10074AHC244BQ-Q100,1174AHC244BQ-Q100Always Pb-free29.90.91.11E911
    74AHC244D-Q10074AHC244D-Q100,11874AHC244D-Q100Always Pb-free29.90.91.11E911
    74AHC244PW-Q10074AHC244PW-Q100,1174AHC244PW-Q100Always Pb-free29.90.91.11E911
    74AHCT244BQ-Q10074AHCT244BQ-Q100,174AHCT244BQ-Q100Always Pb-free29.90.91.11E911
    74AHCT244D-Q10074AHCT244D-Q100,1174AHCT244D-Q100Always Pb-free29.90.91.11E911
    74AHCT244PW-Q10074AHCT244PW-Q100,174AHCT244PW-Q100Always Pb-free29.90.91.11E911
    Quality and reliability disclaimer

    Documentation (8)

    File nameTitleTypeDate
    74AHC_AHCT244_Q100Octal buffer/line driver; 3-stateData sheet2020-07-02
    ahct244ahct244 IBIS modelIBIS model2013-04-07
    ahc244ahc244 IBIS modelIBIS model2013-04-07
    SOT764-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 20 terminals; 0.5 mm pitch; 4.5 mm x 2.5 mm x 1 mm bodyPackage information2021-08-17
    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
    SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
    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
    WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08


    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
    ahct244ahct244 IBIS modelIBIS model2013-04-07
    ahc244ahc244 IBIS modelIBIS model2013-04-07


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