74AHC257-Q100; 74AHCT257-Q100

Quad 2-input multiplexer; 3-state

The 74AHC257-Q100; 74AHCT257-Q100 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard No. 7-A.

The 74AHC257-Q100; 74AHCT257-Q100 has four identical 2-input multiplexers with 3-state outputs. They select 4 bits of data from two sources and a common data select input (S) controls them. The data inputs from source 0 (1I0 to 4I0), are selected when input S is LOW. The data inputs from source 1 (1I1 to 4I1) are selected when input S is HIGH. Data appears at the outputs (1Y to 4Y) in true (non-inverting) form from the selected inputs. The 74AHC257-Q100; 74AHCT257-Q100 is the logic implementation of a 4-pole 2-position switch. The logic levels applied to input S determine the position of the switch. The outputs are forced to a high-impedance OFF-state when OE is HIGH.

The logic equations for the outputs are:

1Y = OE x (1I1 x S + 1I0 x S)

2Y = OE x (2I1 x S + 2I0 x S)

3Y = OE x (3I1 x S + 3I0 x S)

4Y = OE x (4I1 x S + 4I0 x S)

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
  • Balanced propagation delays
  • All inputs have Schmitt-trigger actions
  • Non-inverting data path
  • Inputs accept voltages higher than VCC
  • Input levels:
    • For 74AHC257-Q100: CMOS level
    • For 74AHCT257-Q100: TTL level
  • 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)
  • Multiple package options



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
74AHC257D-Q100Production2.0 - 5.5CMOS± 82.9low-40~1259410.353SO16
74AHC257PW-Q100Production2.0 - 5.5CMOS± 82.9low-40~1251264.956.3TSSOP16
74AHCT257D-Q100Production4.5 - 5.5TTL± 83.7low-40~125939.752SO16
74AHCT257PW-Q100Production4.5 - 5.5TTL± 83.7low-40~1251254.654.9TSSOP16


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
Reel 13" Q1/T1Active74AHC257D74AHC257D-Q100J
( 9353 007 35118 )
Reel 13" Q1/T1ActiveAHC25774AHC257PW-Q100J
( 9353 007 36118 )
Reel 13" Q1/T1Active74AHCT257D74AHCT257D-Q100J
( 9353 007 37118 )
Reel 13" Q1/T1ActiveAHCT25774AHCT257PW-Q100J
( 9353 007 38118 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74AHC257D-Q10074AHC257D-Q100J74AHC257D-Q100Always Pb-free29.90.91.11E911
74AHC257PW-Q10074AHC257PW-Q100J74AHC257PW-Q100Always Pb-free29.90.91.11E911
74AHCT257D-Q10074AHCT257D-Q100J74AHCT257D-Q100Always Pb-free29.90.91.11E911
74AHCT257PW-Q10074AHCT257PW-Q100J74AHCT257PW-Q100Always Pb-free29.90.91.11E911
Quality and reliability disclaimer

Documentation (9)

File nameTitleTypeDate
74AHC_AHCT257_Q100Quad 2-input multiplexer; 3-stateData sheet2017-05-03
ahct257ahct257 IBIS modelIBIS model2013-04-07
ahc257ahc257 IBIS modelIBIS model2013-04-07
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


If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.


File nameTitleTypeDate
ahct257ahct257 IBIS modelIBIS model2013-04-07
ahc257ahc257 IBIS modelIBIS model2013-04-07


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