74HC244-Q100; 74HCT244-Q100

Octal buffer/line driver; 3-state

The 74HC244-Q100; 74HCT244-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 include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

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 to 6.0 V
  • CMOS low power dissipation
  • High noise immunity
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • Input levels:
    • For 74HC244-Q100: CMOS level
    • For 74HCT244-Q100: TTL level
  • Octal bus interface
  • Non-inverting 3-state outputs
  • Complies with JEDEC standards:
    • JESD8C (2.7 V to 3.6 V)
    • JESD7A (2.0 V to 6.0 V)
  • 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)
  • 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
74HC244BQ-Q100Production2.0 - 6.0CMOS± 7.8368low-40~125789.450DHVQFN20
74HC244D-Q100Production2.0 - 6.0CMOS± 7.8368low-40~1258527.561SO20
74HC244PW-Q100Production2.0 - 6.0CMOS± 7.8368low-40~1251004.644.9TSSOP20
74HCT244BQ-Q100Production4.5 - 5.5TTL± 6368low-40~125789.450DHVQFN20
74HCT244D-Q100Production4.5 - 5.5TTL± 6368low-40~1258527.561SO20
74HCT244PW-Q100Production4.5 - 5.5TTL± 6368low-40~1251004.644.9TSSOP20


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT764-1Reel 7” Q1/T1 or Q2/T3ActiveHC24474HC244BQ-Q100,115
( 9352 989 12115 )
Reel 13" Q1/T1Active74HC244D74HC244D-Q100,118
( 9352 989 13118 )
Reel 13" Q1/T1ActiveHC24474HC244PW-Q100,118
( 9352 989 14118 )
SOT764-1Reel 7” Q1/T1 or Q2/T3ActiveHCT24474HCT244BQ-Q100,11
( 9352 989 15115 )
Reel 13" Q1/T1Active74HCT244D74HCT244D-Q100,118
( 9352 989 16118 )
Reel 13" Q1/T1ActiveHCT24474HCT244PW-Q100,11
( 9352 989 17118 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC244BQ-Q10074HC244BQ-Q100,11574HC244BQ-Q100Always Pb-free29.90.91.11E911
74HC244D-Q10074HC244D-Q100,11874HC244D-Q100Always Pb-free29.90.91.11E911
74HC244PW-Q10074HC244PW-Q100,11874HC244PW-Q100Always Pb-free29.90.91.11E911
74HCT244BQ-Q10074HCT244BQ-Q100,1174HCT244BQ-Q100Always Pb-free29.90.91.11E911
74HCT244D-Q10074HCT244D-Q100,11874HCT244D-Q100Always Pb-free29.90.91.11E911
74HCT244PW-Q10074HCT244PW-Q100,1174HCT244PW-Q100Always Pb-free29.90.91.11E911
Quality and reliability disclaimer

Documentation (9)

File nameTitleTypeDate
74HC_HCT244_Q100Octal buffer/line driver; 3-stateData sheet2021-07-28
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
hchc Spice modelSPICE model2013-05-06
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
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
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
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
hchc Spice modelSPICE model2013-05-06


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