Harman Kardon DVD 38, Service Manual

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SN74LVC157A
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
SCAS292G – JANUARY 1993 – REVISED OCTOBER 1998
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
D
EPIC

(Enhanced-Performance Implanted
CMOS) Submicron Process
D
Typical V
OLP
(Output Ground Bounce)
< 0.8 V at V
CC
= 3.3 V, T
A
= 25
°
C
D
Typical V
OHV
(Output V
OH
Undershoot)
> 2 V at V
CC
= 3.3 V, T
A
= 25
°
C
D
Inputs Accept Voltages to 5.5 V
D
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D
Latch-Up Performance Exceeds 250 mA Per
JESD 17
D
Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
This quadruple 2-line to 1-line data selector/multiplexer is designed for 1.65-V to 3.6-V V
CC
operation.
The SN74LVC157A features a common strobe (G) input. When the strobe is high, all outputs are low. When
the strobe is low, a 4-bit word is selected from one of two sources and is routed to the four outputs. The device
provides true data.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
The SN74LVC157A is characterized for operation from –40
°
C to 85
°
C.
FUNCTION TABLE
INPUTS
OUTPUT
G A/B A B
Y
H X X X L
L L L X L
L L H X H
L H X L L
L H X H H
Copyright

1998, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
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2
3
4
5
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7
8
16
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13
12
11
10
9
A/B
1A
1B
1Y
2A
2B
2Y
GND
V
CC
G
4A
4B
4Y
3A
3B
3Y
D, DB, OR PW PACKAGE
(TOP VIEW)
DVD38
harman/kardon
106