Philips 74als20a DATASHEETS
INTEGRATED CIRCUITS
74ALS20A
Dual 4-Input NAND gate
Product specification 1996 Jul 01
IC05 Data Handbook
Philips Semiconductors Product specification
74ALS20ADual 4-input NAND gate
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL
SUPPLY CURRENT
74ALS20A 4.5ns 0.65mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION COMMERCIAL RANGE
V
= 5V ±10%,
CC
T
= 0°C to +70°C
amb
(TOTAL)
DRAWING
NUMBER
PIN CONFIGURATION
11A
2
1B
3
NC
4
1C
5
1D
6
1Y
GND 2Y
14
V
CC
13
2D
12
2C
11
NC
10
2B
9
2A
87
14-pin plastic DIP 74ALS20AN SOT27-1
14-pin plastic SO 74ALS20AD SOT108-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION
74ALS (U.L.)
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
12459101213
1A 1B 1C 1D 2A 2B 2C 2D
IEC/IEEE SYMBOL
1
2
4
5
&
LOAD VALUE
HIGH/LOW
SC00024
6
VCC = Pin 14
GND = Pin 7
LOGIC DIAGRAM
VCC = Pin 14
GND = Pin 7
1Y 2Y
68
SC00025
FUNCTION TABLE
9
10
12
13
8
SF00068
INPUTS OUTPUT
1
1A
2
1B
4
1C
5
1D
9
2A
10
2B
12
2C
13
2D
6
1Y
8
2Y
SC00026
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
1996 Jul 01 853–0859 01670
2
Philips Semiconductors Product specification
SYMBOL
PARAMETER
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
1
UNIT
VOLLow-level output voltage
CC
,
IL
,
ICCSupply current (total)
V
MAX
74ALS20ADual 4-input NAND gate
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
V
V
V
I
OUT
I
OUT
T
amb
T
Supply voltage –0.5 to +7.0 V
CC
Input voltage –0.5 to +7.0 V
IN
Input current –30 to +5 mA
IN
Voltage applied to output in High output state –0.5 to V
Current applied to output in Low output state 16 mA
Operating free-air temperature range 0 to +70 °C
Storage temperature range –65 to +150 °C
stg
RECOMMENDED OPERATING CONDITIONS
V
V
V
I
I
OH
I
OL
T
amb
Supply voltage 4.5 5.0 5.5 V
CC
High-level input voltage 2.0 V
IH
Low-level input voltage 0.8 V
IL
Input clamp current –18 mA
Ik
High-level output current –0.4 mA
Low-level output current 8 mA
Operating free-air temperature range 0 +70 °C
PARAMETER RATING UNIT
CC
V
LIMITS
MIN NOM MAX
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
MIN TYP2MAX
V
V
I
I
I
High-level output voltage VCC±10%, VIL = MAX, VIH = MIN, IOH = –0.4mA V
OH
I
= 4mA 0.25 0.40 V
p
Input clamp voltage VCC = MIN, II = I
IK
I
Input current at maximum input voltage VCC = MAX, VI = 7.0V 0.1 mA
I
High-level input current VCC = MAX, VI = 2.7V 20 µA
IH
Low-level input current VCC = MAX, VI = 0.5V –0.1 mA
IL
O
Output current
3
pp
VCC = MIN, VIL = MAX,
VIH = MIN
IK
VCC = MAX, VO = 2.25V –30 –112 mA
I
CCH
I
CCL
CC
=
OL
I
= 8mA 0.35 0.50 V
OL
VI = 0V 0.3 0.4 mA
VI = 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
3. The output conditions have been chosen to produce a current that closely approximate one half of the true short-circuit output current, I
= 5V, T
CC
amb
= 25°C.
– 2 V
CC
–0.73 –1.5 V
OS
.
1996 Jul 01
3
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