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74HC238; 74HCT238

3-to-8 line decoder/demultiplexer

The 74HC238; 74HCT238 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 and E2 and E3). Every output will be LOW 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 '238 ICs and one inverter. The '238 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

  • Demultiplexing capability

  • Multiple input enable for easy expansion

  • Ideal for memory chip select decoding

  • Active HIGH mutually exclusive outputs

  • Input levels:

    • For 74HC238: CMOS level

    • For 74HCT238: TTL level

  • Complies with JEDEC standards

    • JESD8C (2.7 V to 3.6 V)

    • JESD7A (2.0 V to 6.0 V)

  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

  • 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
74HC238BQProduction2.0 - 6.0CMOS± 5.214low-40~1259414.463DHVQFN16
74HC238DProduction2.0 - 6.0CMOS± 5.214low-40~1259310.053SO16
74HC238PWProduction2.0 - 6.0CMOS± 5.214low-40~1251264.855.6TSSOP16
74HCT238BQProduction4.5 - 5.5TTL± 418low-40~1259414.463DHVQFN16
74HCT238DProduction4.5 - 5.5TTL± 418low-40~1259310.053SO16
74HCT238PWProduction4.5 - 5.5TTL± 418low-40~1251264.855.6TSSOP16

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)）
74HC238BQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveHC23874HC238BQ,115
( 9352 836 81115 )
74HC238D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_653Active74HC238D74HC238D,653
( 9337 146 40653 )
74HC238PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveHC23874HC238PW,118
( 9351 890 00118 )
74HCT238BQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveHCT23874HCT238BQ,115
( 9352 836 82115 )
74HCT238D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_653Active74HCT238D74HCT238D,653
( 9337 151 20653 )
74HCT238PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveHCT23874HCT238PW,118
( 9351 895 60118 )

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)）
74HC238D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_652Withdrawn / End-of-life74HC238D74HC238D,652
( 9337 146 40652 )
74HC238PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_112Withdrawn / End-of-lifeHC23874HC238PW,112
( 9351 890 00112 )
74HCT238D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_652Withdrawn / End-of-life74HCT238D74HCT238D,652
( 9337 151 20652 )
74HCT238PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_112Withdrawn / End-of-lifeHCT23874HCT238PW,112
( 9351 895 60112 )

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
74HC238D9337146406522021-12-312022-06-3074HC238D
    74HC238PW9351890001122021-12-312022-06-3074HC238PW
      74HCT238D9337151206522021-12-312022-06-3074HCT238D
        74HCT238PW9351895601122021-12-312022-06-3074HCT238PW

          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
          74HC238BQ74HC238BQ,11574HC238BQAlways Pb-free
          74HC238D74HC238D,65374HC238Dweek 12, 2005
          74HC238PW74HC238PW,11874HC238PWweek 10, 2005
          74HCT238BQ74HCT238BQ,11574HCT238BQAlways Pb-free
          74HCT238D74HCT238D,65374HCT238Dweek 6, 2004
          74HCT238PW74HCT238PW,11874HCT238PWweek 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
          74HC238D74HC238D,65274HC238Dweek 12, 2005
          74HC238PW74HC238PW,11274HC238PWweek 10, 2005
          74HCT238D74HCT238D,65274HCT238Dweek 6, 2004
          74HCT238PW74HCT238PW,11274HCT238PWweek 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
          74HC_HCT2383-to-8 line decoder/demultiplexerData sheet2024-03-21
          AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
          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

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