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SN74HC21 датащи(PDF) 1 Page - Texas Instruments

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номер детали SN74HC21
подробное описание детали  DUAL 4-INPUT POSITIVE-AND GATES
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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SN74HC21 датащи(HTML) 1 Page - Texas Instruments

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SN54HC21, SN74HC21
DUAL 4-INPUT POSITIVE-AND GATES
SCLS087C – DECEMBER 1982 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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 devices contain two independent 4-input
AND gates. They perform the Boolean function
Y
+ A • B • C • Dor Y + A ) B ) C ) D
in positive logic.
The SN54HC21 is characterized for operation
over the full military temperature range of –55
°C
to 125
°C. The SN74HC21 is characterized for
operation from –40
°C to 85°C.
FUNCTION TABLE
(each gate)
INPUTS
OUTPUT
A
B
C
D
Y
H
H
H
H
H
L
XX
X
L
X
LX
X
L
X
XL
X
L
X
X
X
L
L
logic symbol
1
1A
2
1B
1Y
6
4
1C
5
1D
2Y
8
9
2A
10
2B
&
12
2C
13
2D
† 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.
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.
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
SN54HC21 . . . J OR W PACKAGE
SN74HC21 ...D OR N PACKAGE
(TOP VIEW)
32 1 20 19
910 11 1213
4
5
6
7
8
18
17
16
15
14
2C
NC
NC
NC
2B
NC
NC
1C
NC
1D
SN54HC21 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
Copyright
© 1997, Texas Instruments Incorporated
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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