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74HC138; 74HCT138

3-to-8 line decoder/demultiplexer; inverting

The 74HC138; 74HCT138 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1, E2 and E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '138 ICs and one inverter. The '138 can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Inputs include clamp diodes. This enables 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

  • Demultiplexing capability

  • Multiple input enable for easy expansion

  • Ideal for memory chip select decoding

  • Active LOW mutually exclusive outputs

  • Input levels:

    • For 74HC138: CMOS level

    • For 74HCT138: TTL level

  • Complies with JEDEC standards:

    • JESD8C (2.7 V to 3.6 V)

    • JESD7A (2.0 V to 6.0 V)

  • ESD protection:

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

    • CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V

  • 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)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HC138BQProduction2.0 - 6.0CMOS± 5.212low-40~1259314.363DHVQFN16
74HC138DProduction2.0 - 6.0CMOS± 5.212low-40~1259310.053SO16
74HC138PWProduction2.0 - 6.0CMOS± 5.212low-40~1251254.755.5TSSOP16
74HCT138BQProduction4.5 - 5.5TTL± 419low-40~1259314.363DHVQFN16
74HCT138DProduction4.5 - 5.5TTL± 419low-40~1259310.053SO16
74HCT138PWProduction4.5 - 5.5TTL± 419low-40~1251254.755.5TSSOP16

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)）
74HC138BQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveHC13874HC138BQ,115
( 9352 737 78115 )
74HC138D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_653Active74HC138D74HC138D,653
( 9337 134 00653 )
74HC138PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveHC13874HC138PW,118
( 9351 743 80118 )
74HCT138BQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveHCT13874HCT138BQ,115
( 9352 744 71115 )
74HCT138D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_653Active74HCT138D74HCT138D,653
( 9337 134 10653 )
74HCT138PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveHCT13874HCT138PW,118
( 9351 873 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)）
74HC138D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_652Withdrawn / End-of-life74HC138D74HC138D,652
( 9337 134 00652 )
74HC138PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_112Withdrawn / End-of-lifeHC13874HC138PW,112
( 9351 743 80112 )
74HCT138D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_652Withdrawn / End-of-life74HCT138D74HCT138D,652
( 9337 134 10652 )
74HCT138PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_112Withdrawn / End-of-lifeHCT13874HCT138PW,112
( 9351 873 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
74HC138D9337134006522021-12-312022-06-3074HC138D
    74HC138PW9351743801122021-12-312022-06-3074HC138PW
      74HCT138D9337134106522021-12-312022-06-3074HCT138D
        74HCT138PW9351873201122021-12-312022-06-3074HCT138PW

          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
          74HC138BQ74HC138BQ,11574HC138BQAlways Pb-free
          74HC138D74HC138D,65374HC138Dweek 12, 2005
          74HC138PW74HC138PW,11874HC138PWweek 10, 2005
          74HCT138BQ74HCT138BQ,11574HCT138BQAlways Pb-free
          74HCT138D74HCT138D,65374HCT138Dweek 12, 2005
          74HCT138PW74HCT138PW,11874HCT138PWweek 10, 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
          74HC138D74HC138D,65274HC138Dweek 12, 2005
          74HC138PW74HC138PW,11274HC138PWweek 10, 2005
          74HCT138D74HCT138D,65274HCT138Dweek 12, 2005
          74HCT138PW74HCT138PW,11274HCT138PWweek 10, 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_HCT1383-to-8 line decoder/demultiplexer; invertingData sheet2024-02-26
          AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
          hcHC/HCT Spice modelSPICE model2022-02-17
          HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
          SOT763-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm bodyPackage information2023-05-11
          SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
          SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
          WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08
          SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2023-11-07
          SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm bodyPackage information2023-11-08
          SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08

          支持

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          模型

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

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