DM74ALS21A Dual 4-Input AND Gate
©1986 Fairchild Semiconductor Corporation www.fairchildsemi.com
DM74ALS21A Rev. 1.2 2
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Electrical Characteristics
Over recommended operating free air temperature range. All typical values are measured at V
CC
=
5V, T
A
=
25°C.
Switching Characteristics
Over recommended operating free air temperature range.
Symbol Parameter Rating
V
CC
Supply Voltage 7V
V
I
Input Voltage 7V
T
A
Operating Free Air Temperature Range 0°C to +70°C
T
STG
Storage Temperature Range –65°C to +150°C
θ
JA
Typical Thermal Resistance 116.0°C/W
Symbol Parameter Min. Nom. Max. Units
V
CC
Supply Voltage 4.5 5 5.5 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
I
OH
HIGH Level Output Current –0.4 mA
I
OL
LOW Level Output Current 8 mA
T
A
Free Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min. Typ. Max. Units
V
IK
Input Clamp Voltage V
CC
=
4.5V, I
I
=
–18mA –1.5 V
V
OH
HIGH Level Output Voltage I
OH
=
–0.4mA, V
CC
=
4.5V to 5.5V V
CC
– 2 V
V
OL
LOW Level Output Voltage V
CC
=
4.5V, I
OL
=
8mA 0.35 0.5 V
I
I
Input Current @ Max Input Voltage V
CC
=
5.5V, V
IH
=
7V 0.1 mA
I
IH
HIGH Level Input Current V
CC
=
5.5V, V
IH
=
2.7V 20 µA
I
IL
LOW Level Input Current V
CC
=
5.5V, V
IL
=
0.4V –0.1 mA
I
O
Output Drive Current V
CC
=
5.5V, V
O
=
2.25V –30 –112 mA
I
CC
Supply Current V
CC
=
5.5V Outputs HIGH 0.85 1.4 mA
Outputs LOW 1.4 2.3
Symbol Parameter Conditions Min. Max. Units
t
PLH
Propagation Delay Time, LOW-to-HIGH
Level Output
V
CC
=
4.5V to 5.5V,
R
L
=
500
Ω
,
C
L
=
50pF
415ns
t
PHL
Propagation Delay Time, HIGH-to-LOW
Level Output
210ns
