SN54F21 Datasheet, PDF (1/5 Pages) Texas Instruments – DUAL 4-INPUT POSITIVE-AND GATES

SN54F21, SN74F21
DUAL 4-INPUT POSITIVE-AND GATES
• Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
These devices contain two independent 4-input
AND gates. They perform the Boolean functions
Y = A • B • C • D or Y = A + B + C + D in positive
logic.
The SN54F21 is characterized for operation over
the full military temperature range of – 55°C to
125°C. The SN74F21 is characterized for
operation from 0°C to 70°C.
SDFS006A – MARCH 1987 – REVISED OCTOBER 1993
SN54F21 . . . J PACKAGE
SN74F21 . . . D OR N PACKAGE
(TOP VIEW)
1A 1
1B 2
NC 3
1C 4
1D 5
1Y 6
GND 7
14 V_CC
13 2D
12 2C
11 NC
10 2B
9 2A
8 2Y
SN54F21 . . . FK PACKAGE
(TOP VIEW)
FUNCTION TABLE
(each gate)
INPUTS
OUTPUT
A
B
C
D
Y
H
H
H
H
H
L
X
X
X
L
X
L
X
X
L
X
X
L
X
L
X
X
X
L
L
logic symbol^†
1
1A
&
2
1B
4
1C
5
1D
9
2A
10
2B
12
2C
13
2D
NC
3 2 1 20 19
4
18
2C
NC ₅
17 ^NC
1C ₆
16 NC
NC 7
15 NC
1D 8
14 2B
9 10 11 12 13
NC – No internal connection
6
1Y
8
2Y
† _{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.
logic diagram, each gate (positive logic)
A
B
Y
C
D
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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Copyright © 1993, Texas Instruments Incorporated
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