74HC(T)251

8-input multiplexer; 3-state

The 74HC251; 74HCT251 is an 8-bit multiplexer with eight binary inputs (I0 to I7), three select inputs (S0 to S2) and an output enable input (OE). The select inputs select one of the eight binary inputs and route it to the complementary outputs (Y and Y). A HIGH on OE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Features

  • Input levels:
    • For 74HC251: CMOS level
    • For 74HCT251: TTL level
  • Low-power dissipation
  • Non-inverting data path
  • Specified in compliance with JEDEC standard no. 7A
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • Multiple package options
  • 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
74HC251DProduction2.0 - 6.0CMOS± 5.218low-40~125804.138SO16
74HC251DB
NRND
Not for design in2.0 - 6.0CMOS+/- 5.218low-40~12514842.0SSOP16
74HC251PWProduction2.0 - 6.0CMOS± 5.218low-40~1251142.041.9TSSOP16
74HCT251DProduction4.5 - 5.5TTL± 422low-40~125804.138SO16
74HCT251DB
NRND
Not for design in4.5 - 5.5TTL+/- 422low-40~12514842.0SSOP16
74HCT251PWProduction4.5 - 5.5TTL± 422low-40~1251142.041.9TSSOP16

Package

Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC251D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HC251D74HC251D,653
( 9337 135 20653 )
Bulk Pack, CECCActive74HC251D74HC251D,652
( 9337 135 20652 )
74HC251DB
NRND

SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC25174HC251DB,118
( 9351 886 50118 )
74HC251PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC25174HC251PW,118
( 9351 883 90118 )
Bulk PackActiveHC25174HC251PW,112
( 9351 883 90112 )
74HCT251D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT251D74HCT251D,653
( 9337 135 30653 )
Bulk Pack, CECCActive74HCT251D74HCT251D,652
( 9337 135 30652 )
74HCT251DB
NRND

SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT25174HCT251DB,118
( 9351 886 40118 )
74HCT251PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT25174HCT251PW,118
( 9351 883 80118 )
Bulk PackActiveHCT25174HCT251PW,112
( 9351 883 80112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HC251DB9351886501122018-12-312019-06-3074HC251DB
    74HCT251DB9351886401122018-12-312019-06-3074HCT251DB

      Quality, reliability & chemical content

      Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
      74HC251D74HC251D,65374HC251Dweek 6, 200484.96.621.51E811
      74HC251D74HC251D,65274HC251Dweek 6, 200484.96.621.51E811
      74HC251DB
      NRND
      74HC251DB,11874HC251DBweek 12, 200511
      74HC251PW74HC251PW,11874HC251PWweek 10, 200584.96.621.51E811
      74HC251PW74HC251PW,11274HC251PWweek 10, 200584.96.621.51E811
      74HCT251D74HCT251D,65374HCT251Dweek 6, 200484.96.621.51E811
      74HCT251D74HCT251D,65274HCT251Dweek 6, 200484.96.621.51E811
      74HCT251DB
      NRND
      74HCT251DB,11874HCT251DBweek 12, 200511
      74HCT251PW74HCT251PW,11874HCT251PWweek 10, 200584.96.621.51E811
      74HCT251PW74HCT251PW,11274HCT251PWweek 10, 200584.96.621.51E811
      Quality and reliability disclaimer

      Documentation (19)

      File nameTitleTypeDate
      74HC_HCT2518-input multiplexer; 3-stateData sheet2019-07-15
      AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
      nexperia_selection_guide_2019_201901Selection guide 2019. Discretes, Logic and MOSFETsSelection guide2018-12-12
      HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
      SOT109-1_431SO16; Reel sulfur barrier pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,431 or Z Ordering code (12NC) ending 431Packing2016-08-25
      SOT109-1_118SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-24
      SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm bodyOutline drawing2018-10-18
      SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
      SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
      SOT403-1_623TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 623 or HL; Ordering code (12NC) ending 623Packing2013-05-15
      SOT403-1_118TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-08
      SOT403-1_128TSSOP16; Reel pack; SMD, 13", Turned Q4/T2 180 deg product orientation Orderable part number ending ,128 or HP Ordering code (12NC) ending 128Packing2014-10-14
      SOT403-1_653TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 653 or HL; Ordering code (12NC) ending 653Packing2013-05-15
      SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyOutline drawing2018-11-14
      SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
      SOT338-1_431SSOP16; Reel pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,431 or Z Ordering code (12NC) ending 431Packing2016-10-05
      SOT338-1plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm bodyOutline drawing2018-10-18
      SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
      SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08

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