MC74VHCT157A
Quad 2−Channel Multiplexer
The MC74VHCT157A is an advanced high speed CMOS quad
2−channel multiplexer fabricated with silicon gate CMOS technology.
It achieves high speed operation similar to equivalent Bipolar
Schottky TTL while maintaining CMOS low power dissipation.
It consists of four 2−input digital multiplexers with common select
(S) and enable (E) inputs. When E is held High, selection of data is
inhibited and all the outputs go Low.
The select decoding determines whether the A or B inputs get routed
to the corresponding Y outputs.
The VHCT inputs are compatible with TTL levels. This device can
be used as a level converter for interfacing 3.3 V to 5.0 V because it
has full 5.0 V CMOS level output swings.
The VHCT157A input structures provide protection when voltages
between 0 V and 5.5 V are applied, regardless of the supply voltage.
The output structures also provide protection when V
CC
= 0 V. These
input and output structures help prevent device destruction caused by
supply voltage−input/output voltage mismatch, battery backup, hot
insertion, etc.
The inputs tolerate voltages up to 7.0 V, allowing the interface of
5.0 V systems to 3.0 V systems.
Features
http://onsemi.com
MARKING
DIAGRAMS
16
SOIC−16
D SUFFIX
CASE 751B
1
1
VHCT157AG
AWLYWW
16
TSSOP−16
DT SUFFIX
CASE 948F
1
1
VHCT
157A
ALYWG
G
•
•
•
•
•
•
•
•
•
•
High Speed: t
PD
= 4.1 ns (Typ) at V
CC
= 5.0 V
Low Power Dissipation: I
CC
= 4
mA
(Max) at T
A
= 25°C
TTL−Compatible Inputs: V
IL
= 0.8 V; V
IH
= 2.0 V
Power Down Protection Provided on Inputs and Outputs
Balanced Propagation Delays
Designed for 2.0 V to 5.5 V Operating Range
Low Noise: V
OLP
= 0.8 V (Max)
Pin and Function Compatible with Other Standard Logic Families
Latchup Performance Exceeds 300 mA
ESD Performance:
Human Body Model > 2000 V;
Machine Model > 200 V
•
Chip Complexity: 82 FETs or 20 Equivalent Gates
•
Pb−Free Packages are Available*
16
SOEIAJ−16
M SUFFIX
CASE 966
1
1
74VHCT157
ALYWG
A
= Assembly Location
WL, L
= Wafer Lot
Y
= Year
WW, W = Work Week
G or
G
= Pb−Free Package
(Note: Microdot may be in either location)
FUNCTION TABLE
Inputs
E
H
L
L
S
X
L
H
Outputs
Y0 − Y3
L
A0 −A3
B0 −B3
A0 − A3, B0 − B3 = the levels of
the respective Data−Word Inputs.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 5 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2005
1
December, 2005 − Rev. 2
Publication Order Number:
MC74VHCT157A/D
ONSEMI [ ON SEMICONDUCTOR ]
