74HC251-Q100; 74HCT251-Q100

8-input multiplexer; 3-state

The 74HC251-Q100; 74HCT251-Q100 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.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.

Features and benefits

  • Automotive product qualification in accordance with AEC-Q100 (Grade 1)
    • Specified from -40 °C to +85 °C and from -40 °C to +125 °C
  • 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)
  • Input levels:
    • For 74HC251-Q100: CMOS level
    • For 74HCT251-Q100: TTL level
  • Non-inverting data path
  • ESD protection:
    • MIL-STD-883, method 3015 exceeds 2000 V
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0 Ω)


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
74HC251D-Q100Production2.0 - 6.0CMOS± 5.218low-40~125804.138SO16
74HC251PW-Q100Production2.0 - 6.0CMOS± 5.218low-40~1251142.041.9TSSOP16
74HCT251D-Q100Production4.5 - 5.5TTL± 422low-40~125804.138SO16
74HCT251PW-Q100Production4.5 - 5.5TTL± 422low-40~1251142.041.9TSSOP16


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
Reel 13" Q1/T1Active74HC251D74HC251D-Q100J
( 9353 011 82118 )
Reel 13" Q1/T1ActiveHC25174HC251PW-Q100J
( 9353 013 52118 )
Reel 13" Q1/T1Active74HCT251D74HCT251D-Q100J
( 9353 027 74118 )
Reel 13" Q1/T1ActiveHCT25174HCT251PW-Q100J
( 9353 027 76118 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC251D-Q10074HC251D-Q100J74HC251D-Q100Always Pb-free39.31.37.69E811
74HC251PW-Q10074HC251PW-Q100J74HC251PW-Q100Always Pb-free39.31.37.69E811
74HCT251D-Q10074HCT251D-Q100J74HCT251D-Q100Always Pb-free39.31.37.69E811
74HCT251PW-Q10074HCT251PW-Q100J74HCT251PW-Q100Always Pb-free39.31.37.69E811
Quality and reliability disclaimer

Documentation (9)

File nameTitleTypeDate
74HC_HCT251_Q1008-input multiplexer; 3-stateData sheet2021-02-08
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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