MM74HC157 Quad 2-Input Multiplexer
September 1983
Revised February 1999
MM74HC157
Quad 2-Input Multiplexer
General Description
The MM74HC157 high speed Quad 2-to-1 Line data selec-
tor/Multiplexers utilizes advanced silicon-gate CMOS tech-
nology. It possesses the high noise immunity and low
power consumption of standard CMOS integrated circuits,
as well as the ability to drive 10 LS-TTL loads.
This device consists of four 2-input digital multiplexers with
common select and STROBE inputs. When the STROBE
input is at logical 鈥?鈥?the four outputs assume the values as
selected from the inputs. When the STROBE input is at a
logical 鈥?鈥?the outputs assume logical 鈥?鈥?
The 74HC logic family is functionally as well as pin-out
compatible with the standard 74LS logic family. All inputs
are protected from damage due to static discharge by inter-
nal diode clamps to V
CC
and ground.
Features
s
Typical propagation delay: 14 ns data to any output
s
Wide power supply range: 2鈥?V
s
Low power supply quiescent current: 80
碌A(chǔ)
maximum
(74HC Series)
s
Fan-out of 10 LS-TTL loads
s
Low input current: 1
碌A(chǔ)
maximum
Ordering Code:
Order Number
MM74HC157M
MM74HC157SJ
MM74HC157MTC
MM74HC157N
Package Number
M16A
M16D
MTC16
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150鈥?Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300鈥?Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Connection Diagram
Pin Assignments for DIP, SOIC, SOP and TSSOP
Function Table
Inputs
Strobe
H
L
L
L
L
H
=
HIGH Level,
L
=
LOW Level
X
=
Irrelevant
Output
A
X
L
H
X
X
B
X
X
X
L
H
Y
L
L
H
L
H
Select
X
L
L
H
H
Top View
漏 1999 Fairchild Semiconductor Corporation
DS005314.prf
www.fairchildsemi.com
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