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74HC257; 74HCT257

Quad 2-input multiplexer; 3-state

The 74HC257; 74HCT257 is a quad 2-input multiplexer with 3-state outputs. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Features and benefits

  • 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)
  • Non-inverting data path
  • 3-state outputs interface directly with system bus
  • Input levels:
    • For 74HC257: CMOS level
    • For 74HCT257: TTL level
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 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
74HC257DProduction2.0 - 6.0CMOS± 7.811low-40~125929.652SO16
74HC257PWProduction2.0 - 6.0CMOS± 7.811low-40~1251254.554.6TSSOP16
74HCT257DProduction4.5 - 5.5TTL± 613low-40~125929.652SO16
74HCT257PWProduction4.5 - 5.5TTL± 613low-40~1251254.554.6TSSOP16

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC257D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HC257D74HC257D,653
( 9337 136 40653 )
74HC257PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC25774HC257PW,118
( 9351 746 80118 )
74HCT257D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT257D74HCT257D,653
( 9337 136 50653 )
74HCT257PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT25774HCT257PW,118
( 9351 884 00118 )

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))
74HC257D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk Pack, CECCDiscontinued / End-of-life74HC257D74HC257D,652
( 9337 136 40652 )
74HC257PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeHC25774HC257PW,112
( 9351 746 80112 )
74HCT257D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk Pack, CECCDiscontinued / End-of-life74HCT257D74HCT257D,652
( 9337 136 50652 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HC257D9337136406522021-12-312022-06-3074HC257D
    74HC257PW9351746801122018-12-312019-06-3074HC257PW
      74HCT257D9337136506522021-12-312022-06-3074HCT257D
        74HCT257D/AU935301266118
        74HCT257PW9351884001122018-12-312019-06-3074HCT257PW

          Quality, reliability & chemical content

          Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
          74HC257D74HC257D,65374HC257Dweek 12, 200529.90.91.11E911
          74HC257PW74HC257PW,11874HC257PWweek 10, 200529.90.91.11E911
          74HCT257D74HCT257D,65374HCT257Dweek 35, 200429.90.91.11E911
          74HCT257PW74HCT257PW,11874HCT257PWweek 10, 200529.90.91.11E911

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

          Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
          74HC257D74HC257D,65274HC257Dweek 12, 200529.90.91.11E911
          74HC257PW74HC257PW,11274HC257PWweek 10, 200529.90.91.11E911
          74HCT257D74HCT257D,65274HCT257Dweek 35, 200429.90.91.11E911
          Quality and reliability disclaimer

          Documentation (9)

          File nameTitleTypeDate
          74HC_HCT257Quad 2-input multiplexer; 3-stateData sheet2021-02-09
          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
          SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2021-01-06
          WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08
          SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
          SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyPackage information2020-04-21

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