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Texas Instruments (TI) Electronic Components Datasheet

SN54AS250A Datasheet

1-of-16 Data Generators/Multiplexers

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SN54AS250A, SN74AS250A
1-OF-16 DATA GENERATORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS137A – DECEMBER 1983 – REVISED DECEMBER 1994
4-Line to 1-Line Multiplexers That Can
Select 1-of-16 Data Inputs
Applications:
Boolean Function Generator
Parallel-to-Serial Converter
Data Source Selector
Buffered 3-State Bus Driver Inputs Permit
Multiplexing From n Lines to One Line
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic
(NT) and Ceramic (JT) 300-mil DIPs
description
The AS250A devices provide full binary decoding
to select 1-of-16 data inputs or use sources as an
input with an inverting W output. The selected
sources are buffered with symmetrical
propagation delay times. This reduces the
possibility of transients occurring at the output.
SN54AS250A . . . JT PACKAGE
SN74AS250A . . . DW OR NT PACKAGE
(TOP VIEW)
E7
E6
E5
E4
E3
E2
E1
E0
OE
W
D
GND
1
2
3
4
5
6
7
8
9
10
11
12
24 VCC
23 E8
22 E9
21 E10
20 E11
19 E12
18 E13
17 E14
16 E15
15 A
14 B
13 C
SN54AS250A . . . FK PACKAGE
(TOP VIEW)
A buffered output-enable (OE) input can be used
for n-line to 1-line cascading. Taking OE high
places the output in the high-impedance state. In
the high-impedance state, the output neither loads
nor drives the bus lines significantly.
OE does not affect the internal operations of the
data selector/multiplexer. New data can be set up
while the outputs are disabled.
The SN54AS250A is characterized for operation
over the full military temperature range of – 55°C
to 125°C. The SN74AS250A is characterized for
operation from 0°C to 70°C.
4 3 2 1 28 27 26
E4 5
25 E10
E3 6
24 E11
E2 7
23 E12
NC 8
22 NC
E1 9
21 E13
E0 10
20 E14
OE 11
19 E15
12 13 14 15 16 17 18
NC – No internal connection
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1994, Texas Instruments Incorporated
1


Texas Instruments (TI) Electronic Components Datasheet

SN54AS250A Datasheet

1-of-16 Data Generators/Multiplexers

No Preview Available !

SN54AS250A, SN74AS250A
1-OF-16 DATA GENERATORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS137A – DECEMBER 1983 – REVISED DECEMBER 1994
OE A
LL
LH
LL
LH
LL
LH
LL
LH
LL
LH
LL
LH
LL
LH
LL
LH
HX
FUNCTION TABLE
INPUTS
B C D Ei
L L L E0
L L L E1
H L L E2
H L L E3
L H L E4
L H L E5
H H L E6
H H L E7
L L H E8
L L H E9
H L H E10
H L H E11
L H H E12
L H H E13
H H H E14
H H H E15
XXXX
OUTPUT
W
E0
E1
E2
E3
E4
E5
E6
E7
E8
E9
E10
E11
E12
E13
E14
E15
Z
logic symbol
9
OE
15
A
14
B
13
C
11
D
8
E0
7
E1
6
E2
5
E3
4
E4
3
E5
2
E6
1
E7
23
E8
22
E9
21
E10
20
E11
19
E12
18
E13
17
E14
16
E15
MUX
EN
0
0
G
15
3
10
W
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Pin numbers shown are for the DW, JT, and NT packages.
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN54AS250A
Description 1-of-16 Data Generators/Multiplexers
Maker Texas
Total Page 13 Pages
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