74HC257DB NRND

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.

Not recommended for new designs (NRND), click here for the alternative product.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HC257DB 74HC257DB,118 935188660118 SOT338-1 Order product
74HC257DB 74HC257DB,112 935188660112 SOT338-1 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)Package name
74HC257DB
NRND
Not for design in2.0 - 6.0CMOS+/- 7.811low-40~12514842.0SSOP16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HC257DB
NRND
74HC257DB,118
( 9351 886 60118 )
ActiveHC257
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1

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
74HC257DB
NRND
74HC257DB,112
( 9351 886 60112 )
Withdrawn / End-of-lifeHC257
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Bulk Pack

Discontinuation information

Type numberOrderable part numberlabel.orderingCodeLast time buy dateLast time delivery dateReplacement productStatusComments
74HC257DB
NRND
74HC257DB,1129351886601122018-12-312019-06-3074HC257DBFull withdrawal

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74HC257DB
NRND
74HC257DB,11874HC257DB11

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

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74HC257DB
NRND
74HC257DB,11274HC257DB11
Quality and reliability disclaimer

Documentation (6)

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
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
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

Support

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Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HC257DB74HC257DB,118935188660118Reel 13" Q1/T1Order product
74HC257DB74HC257DB,112935188660112Bulk PackOrder product

Sample

As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.