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參數(shù)資料
| 型號： | SN54ALS28A |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | QUADRUPLE 2-INPUT POSITIVE-NOR BUFFERS |
| 中文描述： | 四2輸入陽性的NOR緩沖器 |
| 文件頁數(shù)： | 1/3頁 |
| 文件大?。?/td> | 45K |
| 代理商： | SN54ALS28A |
SN54ALS28A, SN74ALS28A
QUADRUPLE 2-INPUT POSITIVE-NOR BUFFERS
SDAS193 – D2661, APRIL 1982 – REVISED MAY 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Copyright
1986, Texas Instruments Incorporated
5BASIC
1
Package Options Include Plastic Small
Outline Packages, Ceramic Chip Carriers,
and Standard Plastic and Ceramic 300-mil
DIPs
Dependable Texas Instruments Quality and
Reliability
description
These devices contain four independent 2-input
NOR buffer gates. They perform the Boolean
functions Y = A+B or Y = A
B in positive logic.
The SN54ALS28A is characterized for operation
over the full military temperature range of –55
°
C
to 125
°
C. The SN74ALS28A is characterized for
operation from 0
°
C to 70
°
C.
FUNCTION TABLE
(each gate)
INPUTS
A
B
H
X
X
H
L
L
OUTPUT
Y
L
L
H
logic symbol
≥
1
13
4Y
10
3Y
4
2Y
1Y
1
4B12
4A11
3B9
3A8
2B6
2A5
3
1B
1A2
This symbol is in accordance with ANSI/IEEE Std –1984
and IEC Publication 617-12.
Pin numbers shown are for D, J, and N packages.
4A
4B
4Y
3A
3B
3Y
2A
2B
2Y
1Y
1B
1A
logic diagram (positive logic)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1Y
1A
1B
2Y
2A
2B
GND
V
CC
4Y
4B
4A
3Y
3B
3A
SN54ALS28A . . . J PACKAGE
SN74ALS28A . . . D OR N PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
4B
NC
4A
NC
3Y
1B
NC
2Y
NC
2A
SN54ALS28A . . . FK PACKAGE
(TOP VIEW)
1
1
N
3
3
4
2
G
N
NC–No internal connection
V
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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