TI SN74ALS12A

SDAS008A − MARCH 1984 − REVISED MAY 1986
•
•
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SN54ALS12A . . . J PACKAGE
SN74ALS12A . . . D OR N PACKAGE
(TOP VIEW)
1A
1B
2A
2B
2C
2Y
GND
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
higher VOH levels.
C
H
H
H
L
L
X
X
H
X
L
X
H
X
X
L
H
1B
1C
2A
2B
2C
3A
3B
3C
1
12
4
11
5
10
6
9
7
8
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
1Y
NC
3C
NC
3B
2Y
GND
NC
3Y
3A
4
NC −No internal connection
Y
logic diagram (positive logic)
logic symbol†
1A
3
VCC
1C
1Y
3C
3B
3A
3Y
1B
1A
NC
VCC
1C
2A
NC
2B
NC
2C
OUTPUT
B
13
(TOP VIEW)
FUNCTION TABLE
(each gate)
INPUTS
14
2
SN54ALS12A . . . FK PACKAGE
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.
A
1
&
2
12
1Y
1A
1B
1C
1Y
2A
2B
2C
2Y
3A
3B
3C
3Y
13
3
4
6
2Y
5
9
10
8
3Y
11
† 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.
Copyright  1986, Texas Instruments Incorporated
5BASIC
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•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
•
1
SDAS008A − MARCH 1984 − REVISED MAY 1986
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Off-state output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Operating free-air temperature range: SN54ALS12A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C
SN74ALS12A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
recommended operating conditions
SN54ALS12A
SN74ALS12A
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
UNIT
VCC
VIH
Supply voltage
VIL
VOH
Low-level input voltage
0.7
0.8
High-level output voltage
5.5
5.5
IOL
TA
Low-level output current
4
8
mA
70
°C
High-level input voltage
2
Operating free-air temperature
2
−55
125
V
V
0
V
V
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOL
IOH
II
IIH
IIL
ICCH
ICCL
SN54ALS12A
TYP† MAX
TEST CONDITIONS
SN74ALS12A
TYP†
MAX
MIN
MIN
VCC = 4.5 V,
VCC = 4.5 V,
II = − 18 mA
IOL = 4 mA
VCC = 4.5 V,
VCC = 4.5 V,
IOL = 8 mA
VOH = 5.5 V
0.1
0.1
mA
VCC = 5.5 V,
VCC = 5.5 V,
VI = 7 V
VI = 2.7 V
0.1
0.1
mA
20
20
µA
VCC = 5.5 V,
VCC = 5.5 V,
VI = 0.4 V
VI = 0 V
−0.1
−0.1
mA
0.32
0.6
0.32
0.6
mA
VI = 4.5 V
1.2
2.2
1.2
2.2
mA
VCC = 5.5 V,
† All typical values are at VCC = 5 V, TA = 25°C
−1.5
0.25
−1.5
UNIT
0.4
0.25
0.4
0.35
0.5
V
V
switching characteristics (see Note 1)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
PARAMETER
tPLH
tPHL
FROM
TO
(INPUT)
(OUTPUT)
RL = 2 k Ω,
TA = MIN to MAX
SN54ALS12A SN74ALS12A
MIN
MAX
MIN
MAX
Any
Y
23
59
23
54
ns
Any
Y
5
26
5
18
ns
NOTE 1: Load circuit and voltage waveforms are shown in Section 1 of ALS/AS Logic Data Book, 1986.
2
UNIT
•
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POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
•
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