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74HC237

3-to-8 line decoder, demultiplexer with address latches

The 74HC237 is a 3-to-8 line decoder, demultiplexer with latches at the three address inputs (An). The 74HC237 essentially combines the 3-to-8 decoder function with a 3-bit storage latch. When the latch is enabled (LE = LOW), the 74HC237 acts as a 3-to-8 active LOW decoder. When the latch enable (LE) goes from LOW-to-HIGH, the last data present at the inputs before this transition, is stored in the latches. Further address changes are ignored as long as LE remains HIGH. The output enable input (E1 and E2) controls the state of the outputs independent of the address inputs or latch operation. All outputs are HIGH unless E1 is LOW and E2 is HIGH. The 74HC237 is ideally suited for implementing non-overlapping decoders in 3-state systems and strobes (stored address) applications in bus-oriented systems.

特性

  • Combines 3-to-8 decoder with 3-bit latch

  • Multiple input enable for easy expansion or independent controls

  • Active HIGH mutually exclusive outputs

  • Wide supply voltage range from 2.0 V to 6.0 V

  • CMOS low power dissipation

  • High noise immunity

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

  • 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

  • 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
74HC237DProduction2.0 - 6.0CMOS± 5.218low-40~125711.029SO16
74HC237PWProduction2.0 - 6.0CMOS± 5.218low-40~1251051.031TSSOP16

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)）
74HC237D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_653Active74HC237D74HC237D,653
( 9337 571 90653 )
74HC237PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118Active74HC23774HC237PWJ
( 9356 912 24118 )

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)）
74HC237D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_652Withdrawn / End-of-life74HC237D74HC237D,652
( 9337 571 90652 )

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
74HC237D9337571906522021-12-312022-06-3074HC237D

    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
    74HC237D74HC237D,65374HC237Dweek 6, 2004
    74HC237PW74HC237PWJ74HC237PW

    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
    74HC237D74HC237D,65274HC237Dweek 6, 2004
    品质及可靠性免责声明

    文档 (9)

    文件名称标题类型日期
    74HC2373-to-8 line decoder, demultiplexer with address latchesData sheet2024-01-11
    AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
    HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
    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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