SN54ALS28A Datasheet, PDF (1/3 Pages) Texas Instruments – QUADRUPLE 2-INPUT POSITIVE-NOR BUFFERS

SN54ALS28A, SN74ALS28A
QUADRUPLE 2-INPUT POSITIVE-NOR BUFFERS
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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
AB
OUTPUT
Y
HX
L
XH
L
LL
H
SDAS193 – D2661, APRIL 1982 – REVISED MAY 1986
SN54ALS28A . . . J PACKAGE
SN74ALS28A . . . D OR N PACKAGE
(TOP VIEW)
1Y ₁
1A ₂
1B ₃
2Y ₄
2A ₅
2B ₆
GND ₇
14 V_CC
13 4Y
12 ^4B
11 ^4A
10 ^3Y
9 ^3B
8 ^3A
SN54ALS28A . . . FK PACKAGE
(TOP VIEW)
1B
3 2 1 20 19
4
18
4B
NC ₅
17 ^NC
2Y 6
16 4A
NC 7
15 NC
2A 8
14 3Y
9 10 11 12 13
logic symbol^†
1A ²
≥1
1B ³
2A ⁵
2B ⁶
3A ⁸
3B ⁹
4A ¹¹
4B ¹²
1 _1Y
4 _2Y
10 _3Y
13 _4Y
† _{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.
NC – No internal connection
logic diagram (positive logic)
1A
1Y
1B
2A
2Y
2B
3A
3Y
3B
4A
4Y
4B
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 © 1986, Texas Instruments Incorporated
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