SN54ALS40A_08 Datasheet, PDF (1/3 Pages) Texas Instruments – DUAL 4-INPUT POSITIVE-NAND BUFFERS

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description
These devices contain two independent 4-input
NAND buffer gates. They perform the Boolean
functions Y = A•B•C•D or Y = A + B + C+ D in
positive logic.
The SN54ALS40A is characterized for operation
over the full military temperature range of − 55°C
to 125°C. The SN74ALS40A 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^†
1
1A
&
2
1B
4
1C
5
1D
9
2A
10
2B
12
2C
13
2D
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.
SN54ALS40A, SN74ALS40A
DUAL 4ĆINPUT POSITIVEĆNAND BUFFERS
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SDAS197 − D2661, APRIL 1984 − REVISED MAY 1986
SN54ALS40A . . . J PACKAGE
SN74ALS40A . . . 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
SN54ALS40A . . . FK PACKAGE
(TOP VIEW)
NC
3 2 1 20 19
4
18
2C
NC ₅
17 ^2C
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
5BASIC
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