74HCT157 Datasheet, PDF (2/9 Pages) ON Semiconductor – Quad 2−Input Data Selectors / Multiplexers High−Performance Silicon−Gate CMOS

SELECT 1
A0 2
B0 3
Y0 4
A1 5
B1 6
Y1 7
GND 8
16 V_CC
15
OUTPUT
ENABLE
14 A3
13 B3
12 Y3
11 A2
10 B2
9 Y2
Figure 1. Pin Assignment
FUNCTION TABLE
Inputs
Output
Outputs
Enable Select Y0 − Y3
H
X
L
L
L
A0 −A3
L
H B0 −B3
X = don’t care
A0 − A3, B0 − B3 = the levels of the
respective Data−Word Inputs.
74HCT157
NIBBLE
A INPUTS
NIBBLE
B INPUTS
A0 ²
A1 ⁵
A2 ¹¹
A3 ¹⁴
B0 ³
B1 ⁶
B2 ¹⁰
B3 ¹³
1
SELECT
OUTPUT ¹⁵
ENABLE
4 _Y0
7 _Y1
9 _Y2
12 _Y3
DATA
OUTPUTS
PIN 16 = V_CC
PIN 8 = GND
Figure 2. Logic Diagram
ORDERING INFORMATION
Device
Package
Shipping^†
74HCT157DR2G
SOIC−16
(Pb−Free)
2500 Units / Reel
74HCT157DTR2G
TSSOP−16*
2500 Units / Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*This package is inherently Pb−Free.
http://onsemi.com
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