Datasheet

AC ELECTRICAL CHARACTERISTICS (C
L
=50pF,Inputt
r
=t
f
=6ns)
Symbol Parameter
Test Conditions Value
Unit
V
CC
(V)
C
L
(pF)
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 50 7 12 15 18
ns
t
PLH
t
PHL
Propagation
Delay Time
4.5 50 20 30 38 45
ns
4.5 150 24 36 45 54
t
PZL
t
PZH
3 State Output
Enable Time
4.5 50 R
L
=1KΩ 19 30 38 45
ns
4.5 150 R
L
=1KΩ 23 36 45 54
t
PLZ
t
PHZ
3 State Output
Disable Time
4.5 50 R
L
=1KΩ 19 30 38 45
ns
f
MAX
Maximum CLock
Frequency
4.5 50 31 50 25 21
ns
t
W(L)
t
W(H)
Minimum Pulse
Width (CLOCK)
4.5 50 8 15 19 22
ns
t
s
Minimum Set-up
Time
4.5 50 7 15 19 22
ns
t
h
Minimum Hold
Time
4.5 50 0 0 0
ns
C
IN
Input Capacitance 5 10 10 10 pF
C
OUT
Out put
Capacitance
10
pF
C
PD
(*) Power Dissipation
Capacitance
HCT564
HCT574
67
63
pF
(*) C
PD
is defined as the value of the IC’sinternal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. I
CC
(opr) = C
PD
•V
CC
•f
IN
+I
CC
(per Flip-Flop)
M54/M74HCT564/574
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