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MC74VHCT157A_05 Datasheet, PDF (1/7 Pages) ON Semiconductor – Quad 2−Channel Multiplexer | |||
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MC74VHCT157A
Quad 2âChannel Multiplexer
The MC74VHCT157A is an advanced high speed CMOS quad
2âchannel 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 2âinput 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 VCC = 0 V. These
input and output structures help prevent device destruction caused by
supply voltageâinput/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
⢠High Speed: tPD = 4.1 ns (Typ) at VCC = 5.0 V
⢠Low Power Dissipation: ICC = 4 mA (Max) at TA = 25°C
⢠TTLâCompatible Inputs: VIL = 0.8 V; VIH = 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: VOLP = 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
⢠PbâFree Packages are Available*
http://onsemi.com
MARKING
DIAGRAMS
16
SOICâ16
D SUFFIX
CASE 751B
VHCT157AG
AWLYWW
1
1
16
TSSOPâ16
VHCT
DT SUFFIX
157A
CASE 948F
ALYWG
G
1
1
16
SOEIAJâ16
M SUFFIX
CASE 966
74VHCT157
ALYWG
1
1
A
= Assembly Location
WL, L = Wafer Lot
Y
= Year
WW, W = Work Week
G or G = PbâFree Package
(Note: Microdot may be in either location)
FUNCTION TABLE
Inputs
E
S
H
X
L
L
L
H
Outputs
Y0 â Y3
L
A0 âA3
B0 âB3
A0 â A3, B0 â B3 = the levels of
the respective DataâWord Inputs.
*For additional information on our PbâFree 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 â Rev. 2
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 5 of this data sheet.
Publication Order Number:
MC74VHCT157A/D
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