ꢀꢁ ꢂꢃ ꢄꢅ ꢀ ꢆꢇ ꢄ ꢈꢉ ꢀꢁꢊ ꢃꢄ ꢅꢀ ꢆ ꢇꢄ
ꢋ ꢌꢍꢎ ꢅꢏ ꢉꢐ ꢑꢍ ꢁꢎꢒꢋ ꢉ ꢎꢓ ꢀꢍꢋ ꢍ ꢔꢏꢑꢁ ꢄꢁꢕ ꢉꢖ ꢄꢋꢏ ꢀ
ꢗ ꢍꢋ ꢘꢉ ꢓꢎ ꢏꢁꢑꢙꢓ ꢅ ꢅ ꢏꢙꢋꢓ ꢌꢉꢓ ꢒꢋ ꢎꢒ ꢋꢀ
ꢚ
SDAS008A − MARCH 1984 − REVISED MAY 1986
• Package Options Include Plastic Small
Outline Packages, Ceramic Chip Carriers,
and Standard Plastic and Ceramic 300-mil
DIPs
SN54ALS12A . . . J PACKAGE
SN74ALS12A . . . D OR N PACKAGE
(TOP VIEW)
V
1
2
3
4
5
6
7
14
13
12
11
10
9
1A
1B
2A
2B
2C
CC
• Dependable Texas Instruments Quality and
1C
1Y
3C
3B
3A
3Y
Reliability
description
These devices contain three independent 3-input
NAND gates with open-collector outputs. These
gates perform the Boolean functions Y = A•B•C or
Y = A+B+C 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
2Y
GND
8
SN54ALS12A . . . FK PACKAGE
(TOP VIEW)
3
2
1
20 19
18
higher V
levels.
OH
1Y
NC
3C
NC
3B
2A
NC
2B
4
5
6
7
8
17
16
15
14
The SN54ALS12A is characterized for operation
over the full military temperature range of −55°C
to 125°C. The SN74ALS12A is characterized for
operation from 0°C to 70°C.
NC
2C
9 10 11 12 13
FUNCTION TABLE
(each gate)
INPUTS
OUTPUT
NC−No internal connection
A
H
L
B
H
X
L
C
H
X
X
L
Y
L
H
H
H
logic diagram (positive logic)
X
X
X
1A
1B
1C
1Y
†
logic symbol
1
2A
2B
2C
&
1A
1B
1C
2A
2B
2C
3A
2Y
3Y
2
12
6
1Y
13
3
3A
3B
3C
4
2Y
3Y
5
9
8
10
11
3B
3C
†
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.
ꢎꢌ ꢓ ꢕꢒ ꢙ ꢋꢍ ꢓꢁ ꢕ ꢄꢋꢄ ꢛꢜ ꢝ ꢞꢟ ꢠꢡ ꢢꢛꢞ ꢜ ꢛꢣ ꢤꢥ ꢟ ꢟ ꢦꢜꢢ ꢡꢣ ꢞꢝ ꢧꢥꢨ ꢩꢛꢤ ꢡꢢ ꢛꢞꢜ ꢪꢡ ꢢꢦ ꢫ
ꢎꢟ ꢞ ꢪꢥꢤ ꢢ ꢣ ꢤ ꢞꢜ ꢝꢞ ꢟ ꢠ ꢢ ꢞ ꢣ ꢧꢦ ꢤ ꢛꢝ ꢛꢤꢡ ꢢꢛ ꢞꢜꢣ ꢧꢦ ꢟ ꢢꢬ ꢦ ꢢꢦ ꢟ ꢠꢣ ꢞꢝ ꢋꢦꢭ ꢡꢣ ꢍꢜꢣ ꢢꢟ ꢥꢠ ꢦꢜꢢ ꢣ
ꢣ ꢢ ꢡ ꢜꢪ ꢡ ꢟꢪ ꢮ ꢡ ꢟꢟ ꢡ ꢜ ꢢꢯꢫ ꢎꢟ ꢞ ꢪꢥꢤ ꢢꢛꢞꢜ ꢧꢟ ꢞꢤ ꢦꢣ ꢣꢛ ꢜꢰ ꢪꢞꢦ ꢣ ꢜꢞꢢ ꢜꢦ ꢤꢦ ꢣꢣ ꢡꢟ ꢛꢩ ꢯ ꢛꢜꢤ ꢩꢥꢪ ꢦ
ꢢ ꢦ ꢣ ꢢꢛ ꢜꢰ ꢞꢝ ꢡ ꢩꢩ ꢧꢡ ꢟ ꢡ ꢠ ꢦ ꢢ ꢦ ꢟ ꢣ ꢫ
Copyright 1986, Texas Instruments Incorporated
5BASIC
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001