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74AHC138; 74AHCT138

3-to-8 line decoder/demultiplexer; inverting

The 74AHC138; 74AHCT138 are high-speed Si-gate CMOS devices and are pin compatible with Low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard No. 7A.

The 74AHC138; 74AHCT138 is a 3-to-8 line decoder/demultiplexer. It accepts three binary weighted address inputs (A0, A1 and A2) and, when enabled, provides eight mutually exclusive outputs (Y0 to Y7) that are LOW when selected.

There are three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH.

This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four 74AHC138; 74AHCT138 devices and one inverter. The 74AHC138; 74AHCT138 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. Unused enable inputs must be permanently tied to their appropriate active HIGH or LOW state.

特性

  • Balanced propagation delays

  • All inputs have Schmitt-trigger action

  • Demultiplexing capability

  • Multiple input enable for easy expansion

  • Ideal for memory chip select decoding

  • Inputs accepts voltages higher than VCC

  • For 74AHC138 only: operates with CMOS input levels

  • For 74AHCT138 only: operates with TTL input levels

  • 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
74AHC138BQProduction2.0 - 5.5CMOS± 84.4low-40~1259313.862DHVQFN16
74AHC138DProduction2.0 - 5.5CMOS± 84.4low-40~125939.752SO16
74AHC138PWProduction2.0 - 5.5CMOS± 84.4low-40~1251254.654.7TSSOP16
74AHCT138BQProduction4.5 - 5.5TTL± 84.4low-40~1259313.862DHVQFN16
74AHCT138DProduction4.5 - 5.5TTL± 84.4low-40~125939.752SO16
74AHCT138PWProduction4.5 - 5.5TTL± 84.4low-40~1251254.654.7TSSOP16

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)）
74AHC138BQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveAHC13874AHC138BQ,115
( 9352 855 72115 )
74AHC138D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_118Active74AHC138D74AHC138D,118
( 9352 629 99118 )
74AHC138PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveAHC13874AHC138PW,118
( 9352 630 00118 )
74AHCT138BQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveAHT13874AHCT138BQ,115
( 9352 855 73115 )
74AHCT138D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_118Active74AHCT138D74AHCT138D,118
( 9352 629 97118 )
74AHCT138PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveAHCT13874AHCT138PW,118
( 9352 629 98118 )

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
74AHC138D9352629991122021-12-312022-06-3074AHC138D
    74AHC138PW9352630001122021-12-312022-06-3074AHC138PW
      74AHCT138D9352629971122021-12-312022-06-3074AHCT138D
        74AHCT138PW9352629981122021-12-312022-06-3074AHCT138PW

          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
          74AHC138BQ74AHC138BQ,11574AHC138BQAlways Pb-free
          74AHC138D74AHC138D,11874AHC138Dweek 35, 2004
          74AHC138PW74AHC138PW,11874AHC138PWweek 10, 2005
          74AHCT138BQ74AHCT138BQ,11574AHCT138BQAlways Pb-free
          74AHCT138D74AHCT138D,11874AHCT138Dweek 35, 2004
          74AHCT138PW74AHCT138PW,11874AHCT138PWweek 10, 2005
          品质及可靠性免责声明

          文档 (10)

          文件名称标题类型日期
          74AHC_AHCT1383-to-8 line decoder/demultiplexer; invertingData sheet2024-02-29
          ahc138ahc138 IBIS modelIBIS model2013-04-07
          ahct138ahct138 IBIS modelIBIS model2013-04-07
          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

          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
          ahc138ahc138 IBIS modelIBIS model2013-04-07
          ahct138ahct138 IBIS modelIBIS model2013-04-07

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