N74ALS20AD
74ALS20A
Dual 4-Input NAND gate
Product specification 1996 Jul 01
INTEGRATED CIRCUITS
IC05 Data Handbook
Philips Semiconductors Product specification
74ALS20ADual 4-input NAND gate
2
1996 Jul 01 853–0859 01670
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS20A 4.5ns 0.65mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION COMMERCIAL RANGE
V
CC
= 5V ±10%,
T
amb
= 0°C to +70°C
DRAWING
NUMBER
14-pin plastic DIP 74ALS20AN SOT27-1
14-pin plastic SO 74ALS20AD SOT108-1
PIN CONFIGURATION
14
13
12
11
10
9
87
6
5
4
3
2
11A
1B
NC
1C
1D
1Y
GND 2Y
2A
2B
NC
2C
2D
V
CC
SC00024
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION
74ALS (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
nA, nB, nC, nD Data inputs 1.0/1.0 20µA/0.1mA
nY Data outputs 20/80 0.4mA/8mA
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
V
CC
= Pin 14
GND = Pin 7
12459101213
1A 1B 1C 1D 2A 2B 2C 2D
1Y 2Y
68
SC00025
IEC/IEEE SYMBOL
SF00068
&
6
8
1
2
4
5
9
10
12
13
LOGIC DIAGRAM
V
CC
= Pin 14
GND = Pin 7
1A
1B
1Y
6
1
2
SC00026
1C
4
1D
5
2A
2B
2Y
8
9
10
2C
12
2D
13
FUNCTION TABLE
INPUTS OUTPUT
nA nB nC nD nY
H H H H L
L X X X H
X L X X H
X X L X H
X X X L H
H = High voltage level
L = Low voltage level
X = Don’t care
Philips Semiconductors Product specification
74ALS20ADual 4-input NAND gate
1996 Jul 01
3
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
PARAMETER RATING UNIT
V
CC
Supply voltage –0.5 to +7.0 V
V
IN
Input voltage –0.5 to +7.0 V
I
IN
Input current –30 to +5 mA
V
OUT
Voltage applied to output in High output state –0.5 to V
CC
V
I
OUT
Current applied to output in Low output state 16 mA
T
amb
Operating free-air temperature range 0 to +70 °C
T
stg
Storage temperature range –65 to +150 °C
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
MIN NOM MAX
UNIT
V
CC
Supply voltage 4.5 5.0 5.5 V
V
IH
High-level input voltage 2.0 V
V
IL
Low-level input voltage 0.8 V
I
Ik
Input clamp current –18 mA
I
OH
High-level output current –0.4 mA
I
OL
Low-level output current 8 mA
T
amb
Operating free-air temperature range 0 +70 °C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
SYMBOL
PARAMETER
TEST
CONDITIONS
1
MIN TYP
2
MAX
UNIT
V
OH
High-level output voltage V
CC
±10%, V
IL
= MAX, V
IH
= MIN, I
OH
= –0.4mA V
CC
– 2 V
p
V
CC
= MIN, V
IL
= MAX,
I
OL
= 4mA 0.25 0.40 V
V
OL
Lo
w-
le
v
el
o
u
tp
u
t
v
oltage
CC
,
IL
,
V
IH
= MIN
I
OL
= 8mA 0.35 0.50 V
V
IK
Input clamp voltage V
CC
= MIN, I
I
= I
IK
–0.73 –1.5 V
I
I
Input current at maximum input voltage V
CC
= MAX, V
I
= 7.0V 0.1 mA
I
IH
High-level input current V
CC
= MAX, V
I
= 2.7V 20 µA
I
IL
Low-level input current V
CC
= MAX, V
I
= 0.5V –0.1 mA
I
O
Output current
3
V
CC
= MAX, V
O
= 2.25V –30 –112 mA
pp
I
CCH
V
I
= 0V 0.3 0.4 mA
I
CC
S
u
ppl
y
c
u
rrent
(total)
I
CCL
V
CC
=
MAX
V
I
= 4.5V 1.0 1.5 mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25°C.
3. The output conditions have been chosen to produce a current that closely approximate one half of the true short-circuit output current, I
OS
.
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