74AHC157BQ

Quad 2-input multiplexer

The 74AHC/AHCT157 are high-speed Si-gate CMOS devices and are pin compatible with Low Power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

The 74AHC/AHCT157 are quad 2-input multiplexer 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 74AHC/AHCT157. 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 74AHC/AHCT157 is logic implementation of a 4-pole, 2-position switch, where the position of the switch is determine by the logic levels applied to S.

The logic equations are:

  • 1Y = E x (1I1 x S + 1I0 x S )
  • 2Y = E x (2I1 x S + 2I0 x S)
  • 3Y = E x (3I1 x S + 3I0 x S)
  • 4Y = E x (4I1 x S + 4I0 x S)

The 74AHC/AHCT157 is identical to the 74AHC/AHCT158 but has non-inverting (true) outputs.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74AHC157BQ 74AHC157BQ,115 935285569115 SOT763-1 Order product

Features

  • Balanced propagation delays
  • All inputs have a Schmitt-trigger action
  • Inputs accepts voltages higher than VCC
  • Multiple input enable for easy expansion
  • Ideal for memory chip select decoding
  • For 74AHC157 only: operates with CMOS input levels
  • For 74AHCT157 only: operates with TTL input levels
  • ESD protection:
    • HBM JESD22-A114E exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
    • CDM JESD22-C101C exceeds 1000 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
74AHC157BQProduction2.0 - 5.5CMOS± 83.2low-40~1259112.760DHVQFN16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74AHC157BQ74AHC157BQ,115
( 9352 855 69115 )
ActiveAHC157
DHVQFN16
(SOT763-1)
SOT763-1Reel 7" Q1/T1

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
74AHC157BQ74AHC157BQ,115Not available84.96.621.51E811
Quality and reliability disclaimer

Documentation (5)

File nameTitleTypeDate
74AHC_AHCT157Quad 2-input multiplexerData sheet2017-05-10
AN11106Pin FMEA for AHC/AHCT familyApplication note2019-01-09
ahc157ahc157 IBIS modelIBIS model2013-04-07
SOT763-1_115DHVQFN16; Reel pack, SMD, 7" Q1/T1 standard product orientation Orderable part number ending ,115 or X Ordering code (12NC) ending 115Packing2016-07-05
SOT763-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm bodyOutline drawing2018-11-14

Support

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Models

File nameTitleTypeDate
ahc157ahc157 IBIS modelIBIS model2013-04-07

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74AHC157BQ74AHC157BQ,115935285569115Reel 7" Q1/T1Order product

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