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DM74ALS645A
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 Free Air Temperature Range
Note 2: For I/O ports, I
IH
and I
IL
parameters include the 3-STATE output current (I
OZL
and I
OZH
).
Switching Characteristics
Over Recommended Operating Free Air Temperature Range
Supply Voltage 7V
Input Voltage;
Control Inputs 7V
I/O Ports 5.5V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C
Typical θ
JA
N Package 53.0°C/W
M Package 72.0°C/W
Symbol Parameter Min Typ 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 −15 mA
I
OL
LOW Level Output Current 24 mA
T
A
Operating Free Air Temperature Range 0 70 °C
Symbol Parameter Test Conditions Min Typ Max Units
V
IC
Input Clamp Voltage V
CC
= Min, I
I
= −18 mA −1.5 V
V
OH
HIGH Level Output Voltage V
CC
= 4.5 to 5.5V I
OH
= −0.4 mA V
CC
− 2
V
CC
= Max I
OH
= − 3 mA 2.4 3.2 V
I
OH
= Max 2
V
OL
LOW Level Output Voltage V
CC
= Min I
OL
= 12 mA 0.25 0.4
V
I
OL
= 24 mA 0.35 0.5
I
I
Input Current at V
CC
= Max I/O Ports, V
I
= 5.5V 100
µA
Maximum Input Voltage Control Inputs, V
I
= 7V 100
I
IH
HIGH Level Input Current V
CC
= Max, V
I
= 2.7V (Note 2) 20 µA
I
IL
LOW Level Input Current V
CC
= Max, V
I
= 0.4V (Note 2) −100 µA
I
O
Output Drive Current V
CC
= Max, V
O
= 2.25V −30 −112 mA
I
CC
Supply Current V
CC
= Max Outputs HIGH 30 45
Outputs LOW 36 55 mA
Outputs Disabled 38 58
Symbol Parameter
From To
Conditions Min Max Units
(Input) (Output)
t
PLH
Propagation Delay Time
A or B B or A
V
CC
= 4.5 to 5.5V,
310ns
LOW-to-HIGH Level Output C
L
= 50 pF,
t
PHL
Propagation Delay Time
A or B B or A
R1 = R2 = 500Ω
310ns
HIGH-to-LOW Level Output
t
PZH
Output Enable Time to HIGH Level Output G A or B 5 20 ns
t
PZL
Output Enable Time to LOW Level Output G A or B 5 20 ns
t
PHZ
Output Disable Time from HIGH Level Output G A or B 2 10 ns
t
PLZ
Output Disable Time from LOW Level Output G A or B 4 15 ns
