Datasheet

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SDAS205A − APRIL 1982 − REVISED DECEMBER 1994
Copyright  1994, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
• 8-Line to 1-Line Multiplexers Can Perform
as:
Boolean Function Generators
Parallel-to-Serial Converters
Data Source Selectors
• Input Clamping Diodes Simplify System
Design
• Package Options Include Plastic
Small-Outline (D) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
description
These data selectors/multiplexers provide full
binary decoding to select one-of-eight data
sources. The strobe (G
) input must be at a low
logic level to enable the inputs. A high level at the
strobe terminal forces the W output high and the
Y output low.
The SN54ALS151 is characterized for operation
over the full military temperature range of −55°C
to 125°C. The SN74ALS151 and SN74AS151 are
characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUTS
SELECT
STROBE
OUTPUTS
C B A
STROBE
G
Y W
X X X H L H
L LL L D0 D0
L LH L D1 D1
L HL L D2 D2
L HH L D3 D3
H LL L D4 D4
H LH L D5 D5
H HL L D6 D6
H H H L D7 D7
H = high level, L = low level, X = irrelevant
D0, D1, . . . D7 = the level of the respective D input
SN54ALS151 ...J PACKAGE
SN74ALS151, SN74AS151 ...D OR N PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
D5
D6
NC
D7
A
D1
D0
NC
Y
W
SN54ALS151 . . . FK PACKAGE
(TOP VIEW)
D2 D3 NC
C
B
D4
G
GND
NC
NC − No internal connection
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
D3
D2
D1
D0
Y
W
G
GND
V
CC
D4
D5
D6
D7
A
B
C
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