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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.

Features and benefits

  • 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

Parametrics

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

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (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 )

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC237D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_652Withdrawn / End-of-life74HC237D74HC237D,652
( 9337 571 90652 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HC237D9337571906522021-12-312022-06-3074HC237D

    Environmental information

    Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
    74HC237D74HC237D,65374HC237Dweek 6, 2004
    74HC237PW74HC237PWJ74HC237PW

    The variants in the table below are discontinued. See the table Discontinuation information for more information.

    Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
    74HC237D74HC237D,65274HC237Dweek 6, 2004
    Quality and reliability disclaimer

    Documentation (9)

    File nameTitleTypeDate
    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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