74HC157DB NRND

Quad 2-input multiplexer

The 74HC157; 74HCT157 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL. It is specified in compliance with JEDEC standard no. 7A.

The 74HC/HCT157 are quad 2-input multiplexers which select 4 bits of data from two sources under the control of a common data select input (S). The enable input (E) is active LOW. When E is HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all other input conditions.

Moving the data from two groups of registers to four common output buses is a common use of the 74HC/HCT157. The state of the common data select input (S) determines the particular register from which the data comes. It can also be used as function generator. The device is useful for implementing highly irregular logic by generating any four of the 16 different functions of two variables with one variable common. The 74HC/HCT157 is logic implementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to S.

The logic equations are:

1Y = E × (1I1 × S + 1I0 × S)

2Y = E × (2I1 × S + 2I0 × S)

3Y = E × (3I1 × S + 3I0 × S)

4Y = E × (4I1 × S + 4I0 × S)

The 74HC/HCT157 is identical to the 74HC158 but has non-inverting (true) outputs.

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
74HC157DB 74HC157DB,118 935186870118 SOT338-1 Order product
74HC157DB 74HC157DB,112 935186870112 SOT338-1 Order product

Features

  • Low-power dissipation
  • Non-inverting data path
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • 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
74HC157DB
NRND
Not for design in2.0 - 6.0CMOS+/- 5.211low-40~12514842.0SSOP16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HC157DB
NRND
74HC157DB,118
( 9351 868 70118 )
ActiveHC157
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1
74HC157DB,112
( 9351 868 70112 )
ActiveHC157Bulk Pack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74HC157DB
NRND
74HC157DB,11874HC157DB11
74HC157DB
NRND
74HC157DB,11274HC157DB11
Quality and reliability disclaimer

Documentation (7)

File nameTitleTypeDate
74HC_HCT157Quad 2-input multiplexerData sheet2017-03-30
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
hc15774HC157 IBIS modelIBIS model2015-11-02
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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Models

File nameTitleTypeDate
hc15774HC157 IBIS modelIBIS model2015-11-02

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HC157DB74HC157DB,118935186870118Reel 13" Q1/T1Order product
74HC157DB74HC157DB,112935186870112Bulk PackOrder product

Sample

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