74HCT257D

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.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HCT257D 74HCT257D,653 933713650653 SOT109-1 Order product
74HCT257D 74HCT257D,652 933713650652 SOT109-1 Order product
74HCT257D/AU 74HCT257D/AUJ 935301266118 SOT109-1 Order product
74HCT257D/S71 74HCT257D/S71,118 935066750118 SOT109-1 Order product

Features

  • Non-inverting data path
  • 3-state outputs interface directly with system bus
  • Complies with JEDEC standard no. 7A
  • 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
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Target applications

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
74HCT257DProduction4.5 - 5.5TTL± 613low-40~125929.652SO16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HCT257D74HCT257D,653
( 9337 136 50653 )
Active74HCT257D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECC
74HCT257D,652
( 9337 136 50652 )
Active74HCT257DBulk Pack, CECC

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

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HCT257D/AU74HCT257D/AUJ
( 9353 012 66118 )
Withdrawn / End-of-life74HCT257D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1
74HCT257D/S7174HCT257D/S71,118
( 9350 667 50118 )
Withdrawn / End-of-lifeStandard Marking
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1

Discontinuation information

Type numberOrderable part numberlabel.orderingCodeLast time buy dateLast time delivery dateReplacement productStatusComments
74HCT257D/AU74HCT257D/AUJ935301266118
74HCT257D/S7174HCT257D/S71,118935066750118

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
74HCT257D74HCT257D,65374HCT257D84.96.621.51E811
74HCT257D74HCT257D,65274HCT257D84.96.621.51E811

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

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
74HCT257D/AU74HCT257D/AUJNot available84.96.621.51E811
74HCT257D/S7174HCT257D/S71,118Not available84.96.621.51E811
Quality and reliability disclaimer

Documentation (7)

File nameTitleTypeDate
74HC_HCT257Quad 2-input multiplexer; 3-stateData sheet2017-03-16
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
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

Support

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Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HCT257D74HCT257D,653933713650653Reel 13" Q1/T1 CECCOrder product
74HCT257D74HCT257D,652933713650652Bulk Pack, CECCOrder product
74HCT257D/AU74HCT257D/AUJ935301266118Reel 13" Q1/T1Order product
74HCT257D/S7174HCT257D/S71,118935066750118Reel 13" Q1/T1Order product

Sample

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Sample orders normally take 2-4 days for delivery.

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