Datasheet

www.fairchildsemi.com 4
74VHC574
AC Electrical Characteristics
Note 4: Parameter guaranteed by design. t
OSLH
|t
PLH max
t
PLH min
|; t
OSHL
|t
PHL max
t
PHL min
|
Note 5: C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average
operating current can be obtained by the equation: I
CC
(opr.) C
PD
* V
CC
* f
IN
I
CC
/8 (per F/F). The total C
PD
when n pcs. of the Octal D Flip-Flop operates
can be calculated by the equation: C
PD
(total) 20 8n.
AC Operating Requirements
Symbol Parameter
V
CC
(V)
T
A
25 CT
A
40 C to 85 C
Units Conditions
Min Typ Max Min Max
t
PLH
Propagation Delay 3.3 0.3 8.5 13.2 1.0 15.5
ns
C
L
15 pF
t
PHL
Time (CP to O
n
) 11.0 16.7 1.0 19.0 C
L
50 pF
5.0 0.5 5.6 8.6 1.0 10.0
ns
C
L
15 pF
7.1 10.6 1.0 12.0 C
L
50 pF
t
PZL
3-STATE Output 3.3 0.3 8.2 12.8 1.0 15.0
ns
R
L
1 k C
L
15 pF
t
PZH
Enable Time 10.7 16.3 1.0 18.5 C
L
50 pF
5.0 0.5 5.9 9.0 1.0 10.5
ns
C
L
15 pF
7.4 11.0 1.0 12.5 C
L
50 pF
t
PLZ
3-STATE Output 3.3 0.3 11.0 15.0 1.0 17.0
ns
R
L
1 k C
L
50 pF
t
PHZ
Disable Time 5.0 0.5 7.1 10.1 1.0 11.5 C
L
50 pF
t
OSLH
Output to 3.3 0.3 1.5 1.5
ns
(Note 4) C
L
50 pF
t
OSHL
Output Skew 5.0 0.5 1.0 1.0 C
L
50 pF
f
MAX
Maximum Clock 3.3 0.3 80 125 65
MHz
C
L
15 pF
Frequency 50 75 45 C
L
50 pF
5.0 0.5 130 180 110 C
L
15 pF
85 115 75 C
L
50 pF
C
IN
Input 4 10 10 pF V
CC
Open
Capacitance
C
OUT
Output 6 pF V
CC
5.0V
Capacitance
C
PD
Power Dissipation 28 pF (Note 5)
Capacitance
Symbol Parameter
V
CC
(V)
T
A
25 CT
A
40 C to 85 C
Units
Min Typ Max Min Max
t
W
(H) Minimum Pulse Width (CP) 3.3 0.3 5.0 5.0
ns
t
W
(L) 5.0 0.5 5.0 5.0
t
S
Minimum Set-Up Time 3.3 0.3 3.5 3.5
ns
5.0 0.5 3.5 3.5
t
H
Minimum Hold Time 3.3 0.3 1.5 1.5
5.0 0.5 1.5 1.5