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74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

The 74AHC244; 74AHCT244 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.

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:
    • For 74AHC244: CMOS level
    • For 74AHCT244: TTL level
  • 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

Parametrics

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)fmax (MHz)No of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Rth(j-c) (K/W)Package name
74AHC244BQProduction2.0 - 5.5CMOS± 8608low-40~1257850DHVQFN20
74AHC244DProduction2.0 - 5.5CMOS± 8608low-40~1258561SO20
74AHC244PWProduction2.0 - 5.5CMOS± 8608low-40~12510044.7TSSOP20
74AHCT244APWProduction4.5 - 5.5TTL± 8608low-40~12510145TSSOP20
74AHCT244BQProduction4.5 - 5.5TTL± 8608low-40~1257850DHVQFN20
74AHCT244DProduction4.5 - 5.5TTL± 8608low-40~1258561SO20
74AHCT244PWProduction4.5 - 5.5TTL± 8608low-40~12510044.7TSSOP20

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74AHC244BQ
DHVQFN20
(SOT764-1)
SOT764-1Reel 7” Q1/T1 or Q2/T3ActiveAHC24474AHC244BQ,115
( 9352 855 37115 )
74AHC244D
SO20
(SOT163-1)
SOT163-1WAVE_BG-BD-1
Reel 13" Q1/T1Active74AHC244D74AHC244D,118
( 9352 620 01118 )
74AHC244PW
TSSOP20
(SOT360-1)
SOT360-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveAHC24474AHC244PW,118
( 9352 620 02118 )
74AHCT244APW
TSSOP20
(SOT360-1)
SOT360-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveAHT244A74AHCT244APWJ
( 9353 082 62118 )
74AHCT244BQ
DHVQFN20
(SOT764-1)
SOT764-1Reel 7” Q1/T1 or Q2/T3ActiveAHCT24474AHCT244BQ,115
( 9352 855 41115 )
74AHCT244D
SO20
(SOT163-1)
SOT163-1WAVE_BG-BD-1
Reel 13" Q1/T1Active74AHCT244D74AHCT244D,118
( 9352 619 57118 )
74AHCT244PW
TSSOP20
(SOT360-1)
SOT360-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveAHCT24474AHCT244PW,118
( 9352 619 59118 )

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74AHC244D
SO20
(SOT163-1)
SOT163-1WAVE_BG-BD-1
Bulk PackDiscontinued / End-of-life74AHC244D74AHC244D,112
( 9352 620 01112 )
74AHC244PW
TSSOP20
(SOT360-1)
SOT360-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeAHC24474AHC244PW,112
( 9352 620 02112 )
74AHCT244D
SO20
(SOT163-1)
SOT163-1WAVE_BG-BD-1
Bulk PackDiscontinued / End-of-life74AHCT244D74AHCT244D,112
( 9352 619 57112 )
74AHCT244PW
TSSOP20
(SOT360-1)
SOT360-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeAHCT24474AHCT244PW,112
( 9352 619 59112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74AHC244D935262001112
74AHC244PW935262002112
74AHCT244D935261957112
74AHCT244PW935261959112

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74AHC244BQ74AHC244BQ,11574AHC244BQAlways Pb-free29.90.91.11E911
74AHC244D74AHC244D,11874AHC244Dweek 30, 200429.90.91.11E911
74AHC244PW74AHC244PW,11874AHC244PWweek 7, 200529.90.91.11E911
74AHCT244APW74AHCT244APWJ74AHCT244APWweek 25, 201919.30.52E911
74AHCT244BQ74AHCT244BQ,11574AHCT244BQAlways Pb-free29.90.91.11E911
74AHCT244D74AHCT244D,11874AHCT244Dweek 30, 200429.90.91.11E911
74AHCT244PW74AHCT244PW,11874AHCT244PWweek 7, 200529.90.91.11E911

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74AHC244D74AHC244D,11274AHC244Dweek 30, 200429.90.91.11E911
74AHC244PW74AHC244PW,11274AHC244PWweek 7, 200529.90.91.11E911
74AHCT244D74AHCT244D,11274AHCT244Dweek 30, 200429.90.91.11E911
74AHCT244PW74AHCT244PW,11274AHCT244PWweek 7, 200529.90.91.11E911
Quality and reliability disclaimer

Documentation (8)

File nameTitleTypeDate
74AHC_AHCT244Octal 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
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

Support

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Models

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

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