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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.

特性

  • 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: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V

    • CDM: ANSI/ESDA/JEDEC JS-002 class C3 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

参数类型

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)fmax (MHz)Nr 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
74AHCT244BQProduction4.5 - 5.5TTL± 8608low-40~1257850DHVQFN20
74AHCT244DProduction4.5 - 5.5TTL± 8608low-40~1258561SO20
74AHCT244PWProduction4.5 - 5.5TTL± 8608low-40~12510044.7TSSOP20

封装

型号封装尺寸版本回流焊/波峰焊包装状态标示可订购的器件编号，（订购码(12NC)）
74AHC244BQ
DHVQFN20
(SOT764-1) 		SOT764-1SOT764-1_115ActiveAHC24474AHC244BQ,115
( 9352 855 37115 )
74AHC244D
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_118Active74AHC244D74AHC244D,118
( 9352 620 01118 )
74AHC244PW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_118ActiveAHC24474AHC244PW,118
( 9352 620 02118 )
74AHCT244BQ
DHVQFN20
(SOT764-1) 		SOT764-1SOT764-1_115ActiveAHCT24474AHCT244BQ,115
( 9352 855 41115 )
74AHCT244D
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_118Active74AHCT244D74AHCT244D,118
( 9352 619 57118 )
74AHCT244PW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_118ActiveAHCT24474AHCT244PW,118
( 9352 619 59118 )

下表中的版本已停产。参见表 停产信息 了解更多信息。

型号封装尺寸版本回流焊/波峰焊包装状态标示可订购的器件编号，（订购码(12NC)）
74AHC244D
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_112Withdrawn / End-of-life74AHC244D74AHC244D,112
( 9352 620 01112 )
74AHC244PW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_112Withdrawn / End-of-lifeAHC24474AHC244PW,112
( 9352 620 02112 )
74AHCT244D
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_112Withdrawn / End-of-life74AHCT244D74AHCT244D,112
( 9352 619 57112 )
74AHCT244PW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_112Withdrawn / End-of-lifeAHCT24474AHCT244PW,112
( 9352 619 59112 )

停产信息

型号可订购的器件编号，（订购码(12NC)）最后一次购买日期最后一次交货日期替代产品状态备注
74AHC244D9352620011122021-12-312022-06-3074AHC244D
    74AHC244PW9352620021122021-12-312022-06-3074AHC244PW
      74AHCT244D9352619571122021-12-312022-06-3074AHCT244D
        74AHCT244PW9352619591122021-12-312022-06-3074AHCT244PW

          环境信息

          型号可订购的器件编号化学成分RoHSRHF指示符无铅转换日期
          74AHC244BQ74AHC244BQ,11574AHC244BQAlways Pb-free
          74AHC244D74AHC244D,11874AHC244Dweek 30, 2004
          74AHC244PW74AHC244PW,11874AHC244PWweek 7, 2005
          74AHCT244BQ74AHCT244BQ,11574AHCT244BQAlways Pb-free
          74AHCT244D74AHCT244D,11874AHCT244Dweek 30, 2004
          74AHCT244PW74AHCT244PW,11874AHCT244PWweek 7, 2005

          下表中的版本已停产。参见表 停产信息 了解更多信息。

          型号可订购的器件编号化学成分RoHSRHF指示符无铅转换日期
          74AHC244D74AHC244D,11274AHC244Dweek 30, 2004
          74AHC244PW74AHC244PW,11274AHC244PWweek 7, 2005
          74AHCT244D74AHCT244D,11274AHCT244Dweek 30, 2004
          74AHCT244PW74AHCT244PW,11274AHCT244PWweek 7, 2005
          品质及可靠性免责声明

          文档 (9)

          文件名称标题类型日期
          74AHC_AHCT244Octal buffer/line driver; 3-stateData sheet2023-09-20
          AN263Power considerations when using CMOS and BiCMOS logic devicesApplication note2023-02-07
          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 information2022-06-21
          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 information2022-06-21
          SOT163-1plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm bodyPackage information2022-06-20
          WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08

          支持

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          模型

          文件名称标题类型日期
          ahct244ahct244 IBIS modelIBIS model2013-04-07
          ahc244ahc244 IBIS modelIBIS model2013-04-07

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