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SN54AS20A Datasheet(PDF) 1 Page - Texas Instruments

Part No. SN54AS20A
Description  DUAL 4-INPUT POSITIVE-NAND GATES
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
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SN54AS20A Datasheet(HTML) 1 Page - Texas Instruments

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SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20
DUAL 4-INPUT POSITIVE-NAND GATES
SDAS192B – APRIL 1982 – REVISED DECEMBER 1994
Copyright
© 1994, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Package Options Include Plastic
Small-Outline (D) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
description
These devices contain two independent 4-input
positive-NAND gates. They perform the Boolean
functions Y = A
• B • C • D or Y = A + B + C + D
in positive logic.
The
SN54ALS20A
and
SN54AS20
are
characterized for operation over the full military
temperature range of – 55
°C to 125°C. The
SN74ALS20A and SN74AS20 are characterized
for operation from 0
°C to 70°C.
FUNCTION TABLE
(each gate)
INPUTS
OUTPUT
A
B
C
D
Y
H
H
H
H
L
L
XX
X
H
X
LX
X
H
X
XL
X
H
X
X
X
L
H
logic symbol
logic diagram (positive logic)
&
1Y
6
2Y
8
1
1A
2
1B
4
1C
5
1D
9
2A
10
2B
12
2C
13
2D
1Y
1D
1A
1B
1C
2C
2B
2A
2D
2Y
1
2
4
5
9
10
12
13
6
8
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
SN54ALS20A, SN54AS20 ...J PACKAGE
SN74ALS20A, SN74AS20 ...D OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1A
1B
NC
1C
1D
1Y
GND
VCC
2D
2C
NC
2B
2A
2Y
SN54ALS20A, SN54AS20 . . . FK PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
2C
NC
NC
NC
2B
NC
NC
1C
NC
1D
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.


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