Texas Instruments SN54HC157J, SN74HC157D, SN74HC157DR, SN74HC157N, SN74HC157N3 Datasheet
...
G
Y
SN54HC157, SN74HC157
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
SCLS113B – DECEMBER 1982 – REVISED MAY 1997
D
Package Options Include Plastic
Small-Outline (D) and Ceramic Flat (W)
Packages, Ceramic Chip Carriers (FK), and
Standard Plastic (N) and Ceramic (J)
300-mil DIPs
description
These monolithic data selectors/multiplexers
contain inverters and drivers to supply full data
selection to the four output gates. A separate
strobe (G
selected from one of two sources and is routed to
the four outputs. The ’HC157 present true data.
The SN54HC157 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74HC157 is characterized for
operation from –40°C to 85°C.
) input is provided. A 4-bit word is
FUNCTION TABLE
INPUTS
SELECT
A/B
H X X X L
L L L XL
L L H XH
L H X LL
L H X H H
DATA
A B
OUTPUT
SN54HC157 ...J OR W PACKAGE
SN74HC157 . . . D OR N PACKAGE
SN54HC157 . . . FK PACKAGE
1B
1Y
NC
2A
2B
NC – No internal connection
(TOP VIEW)
A/B
1
1A
2
1B
3
1Y
4
5
2A
6
2B
7
2Y
GND
8
(TOP VIEW)
1A
3212019
4
5
6
7
8
910111213
2Y
A/B
GND
NC
NC
16
15
14
13
12
11
10
9
V
3Y
CC
V
G
4A
4B
4Y
3A
3B
3Y
G
18
17
16
15
14
3B
CC
4A
4B
NC
4Y
3A
logic symbol
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, N, and W packages.
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.
†
15
G
1
A/B
2
1A
3
1B
5
2A
6
2B
11
3A
10
3B
14
4A
13
4B
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.
EN
G1
1
1
MUX
4
1Y
7
2Y
9
3Y
12
4Y
Copyright 1997, Texas Instruments Incorporated
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
1
SN54HC157, SN74HC157
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
SCLS113B – DECEMBER 1982 – REVISED MAY 1997
logic diagram (positive logic)
2
1A
3
1B
5
2A
6
2B
11
3A
10
3B
14
4A
4
1Y
7
2Y
9
3Y
12
13
4B
15
G
1
A/B
Pin numbers shown are for the D, J, N, and W packages.
absolute maximum ratings over operating free-air temperature range
†
4Y
Supply voltage range, VCC –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
(VO < 0 or VO > VCC) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OK
Continuous output current, IO (VO = 0 to VCC) ±35 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through VCC or GND ±70 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
(see Note 2): D package 113°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JA
N package 78°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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