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74HC244; 74HCT244

Octal buffer/line driver; 3-state

The 74HC244; 74HCT244 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.

特性

  • 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: CMOS level

    • For 74HCT244: 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:

    • HBM JESD22-A114F exceeds 2000 V

    • MM JESD22-A115-A exceeds 200 V

  • Multiple package options

  • Specified from -40 °C to +85 °C and -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
74HC244BQProduction2.0 - 6.0CMOS± 7.8368low-40~1257850DHVQFN20
74HC244DProduction2.0 - 6.0CMOS± 7.8368low-40~1258561SO20
74HC244PWProduction2.0 - 6.0CMOS± 7.8368low-40~12510044.9TSSOP20
74HCT244BQProduction4.5 - 5.5TTL± 6368low-40~1257850DHVQFN20
74HCT244DProduction4.5 - 5.5TTL± 6368low-40~1258561SO20
74HCT244PWProduction4.5 - 5.5TTL± 6368low-40~12510044.9TSSOP20

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)）
74HC244BQ
DHVQFN20
(SOT764-1) 		SOT764-1SOT764-1_115ActiveHC24474HC244BQ,115
( 9352 736 78115 )
74HC244D
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_653Active74HC244D74HC244D,653
( 9337 134 20653 )
74HC244PW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_118ActiveHC24474HC244PW,118
( 9351 746 40118 )
74HCT244BQ
DHVQFN20
(SOT764-1) 		SOT764-1SOT764-1_115ActiveHCT24474HCT244BQ,115
( 9352 737 29115 )
74HCT244D
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_653Active74HCT244D74HCT244D,653
( 9337 134 30653 )
74HCT244PW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_118ActiveHCT24474HCT244PW,118
( 9351 652 20118 )

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)）
74HC244D
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_652Withdrawn / End-of-life74HC244D74HC244D,652
( 9337 134 20652 )
74HC244PW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_112Withdrawn / End-of-lifeHC24474HC244PW,112
( 9351 746 40112 )
74HCT244D
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_652Withdrawn / End-of-life74HCT244D74HCT244D,652
( 9337 134 30652 )
74HCT244PW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_112Withdrawn / End-of-lifeHCT24474HCT244PW,112
( 9351 652 20112 )

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
74HC244D9337134206522021-12-312022-06-3074HC244D
    74HC244PW9351746401122021-12-312022-06-3074HC244PW
      74HCT244D9337134306522021-12-312022-06-3074HCT244D
        74HCT244PW9351652201122021-12-312022-06-3074HCT244PW

          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
          74HC244BQ74HC244BQ,11574HC244BQAlways Pb-free
          74HC244D74HC244D,65374HC244Dweek 13, 2005
          74HC244PW74HC244PW,11874HC244PWweek 7, 2005
          74HCT244BQ74HCT244BQ,11574HCT244BQAlways Pb-free
          74HCT244D74HCT244D,65374HCT244Dweek 30, 2004
          74HCT244PW74HCT244PW,11874HCT244PWweek 17, 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
          74HC244D74HC244D,65274HC244Dweek 13, 2005
          74HC244PW74HC244PW,11274HC244PWweek 7, 2005
          74HCT244D74HCT244D,65274HCT244Dweek 30, 2004
          74HCT244PW74HCT244PW,11274HCT244PWweek 17, 2005
          品质及可靠性免责声明

          文档 (11)

          文件名称标题类型日期
          74HC_HCT244Octal buffer/line driver; 3-stateData sheet2021-07-28
          AN263Power considerations when using CMOS and BiCMOS logic devicesApplication note2023-02-07
          AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
          D12_PC_sch_ver2_0D12_PC_sch_ver2_0Other type2023-09-12
          hcHC/HCT Spice modelSPICE model2022-02-17
          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 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

          如果您需要设计/技术支持，请告知我们并填写 应答表, 我们会尽快回复您。

          模型

          文件名称标题类型日期
          hcHC/HCT Spice modelSPICE model2022-02-17

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