SN74ALS22B Datasheet, PDF (1/3 Pages) Texas Instruments – DUAL 4-INPUT POSITIVE-NAND GATES WITH OPEN-COLLECTOR OUTPUTS

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description
These devices contain two independent 4-input
NAND gates. They perform the Boolean functions
Y = A•B•C•D or Y = A+B+C+D in positive logic.
The open-collector outputs require pullup
resistors to perform correctly. They may be
connected to other open-collector outputs to
implement active-low wired-OR or active-high
wired-AND functions. Open-collector devices are
often used to generate higher V_OH levels.
The SN54ALS22B is characterized for operation
over the full military temperature range of 55°C
to 125°C. The SN74ALS22B is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
(each gate)
INPUTS
OUTPUT
ABCD
Y
HHHH
L
LXXX
H
XLXX
H
XXLX
H
XXXL
H
logic symbol^†
1A ¹
1B ²
1C ⁴
1D ⁵
2A ⁹
2B ¹⁰
2C ¹²
2D ¹³
&
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 D, J, and N packages.
SN54ALS22B, SN74ALS22B
DUAL 4-INPUT POSITIVE-NAND GATES
WITH OPEN-COLLECTOR OUTPUTS
SDAS005A – MARCH 1984 – REVISED MAY 1986
SN54ALS22B . . . J PACKAGE
SN74ALS22B . . . 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
SN54ALS22B . . . FK PACKAGE
(TOP VIEW)
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
logic diagram (positive logic)
1A
1B
1Y
1C
1D
2A
2B
2Y
2C
2D
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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