Datasheet

AC ELECTRICAL CHARACTERISTICS (C
L
=50pF,Inputt
r
=t
f
=6ns)
Symbol Parameter
Test Conditions Value
Unit
V
CC
(V)
T
A
=25
o
C
54HC and 74HC
-40 to 85
o
C
74HC
-55 to 125
o
C
54HC
Min. Typ. Max. Min. Max. Min. Max.
t
TLH
t
THL
Output Transition
Time
4.5 8151922ns
t
PLH
t
PHL
Propagation
Delay Time
4.5 13 21 26 32 ns
C
IN
Input Capacitance 5 10 10 10 pF
C
PD
(*) Power Dissipation
Capacitance
38 pF
(*) C
PD
isdefined as the value ofthe IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit).Average operting current can be obtained by the followingequation. I
CC
(opr) = C
PD
•V
CC
•f
IN
+I
CC
/4 (per Gate)
SWITCHING CHARACTERISTICS TEST CIRCUIT
INPUTWAVEFORMIS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICSTEST.
TEST CIRCUIT I
CC
(Opr.)
M54/M74HCT08
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