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參數(shù)資料
| 型號(hào)： | SNJ54ALS28AFKR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 門電路 |
| 英文描述： | ALS SERIES, QUAD 2-INPUT NOR GATE, CQCC20 |
| 封裝： | CERAMIC, LCC-20 |
| 文件頁(yè)數(shù)： | 1/3頁(yè) |
| 文件大?。?/td> | 42K |
| 代理商： | SNJ54ALS28AFKR |
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
OUTPUT
A
B
Y
H
X
L
X
HL
L
H
logic symbol
≥1
13
4Y
10
3Y
4
2Y
1Y
1
4B
12
4A
11
3B
9
3A
8
2B
6
2A
5
3
1B
1A
2
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
VCC
4Y
4B
4A
3Y
3B
3A
SN54ALS28A ...J PACKAGE
SN74ALS28A ...D OR N PACKAGE
(TOP VIEW)
3
2
1 20 19
910 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)
1A
1Y
NC
3A
3B
4Y
2B
GND
NC
NC – No internal connection
V
CC
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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