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DM74AS21
Absolute Maximum Ratings(Note 1)
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
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
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C
Typical θ
JA
N Package 84.0°C/W
M Package 114.0°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 −2mA
I
OL
LOW Level Output Current 20 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
= −18 mA −1.2 V
V
OH
HIGH Level I
OH
= −2 mA,
V
CC
− 2V
Output Voltage V
CC
= 4.5V to 5.5V
V
OL
LOW Level V
CC
= 4.5V
0.35 0.5 V
Output Voltage I
OL
= 20 mA
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 −0.5 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 2.9 4.6 mA
Outputs LOW 7.4 12 mA
Symbol Parameter Conditions Min Max Units
t
PLH
Propagation Delay Time V
CC
= 4.5V to 5.5V
16ns
LOW-to-HIGH Level Output R
L
= 500Ω
t
PHL
Propagation Delay Time C
L
= 50 pF
16ns
HIGH-to-LOW Level Output
