Data Sheet

3 www.fairchildsemi.com
74VHC541
AC Electrical Characteristics
Note 4: Parameter guaranteed by design. t
OSLH
|t
PLHmax
t
PLHmin
|; t
OSHL
|t
PHLmax
t
PHLmin
|.
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 bit).
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 5.0 7.0 1.0 8.5
ns
C
L
15 pF
t
PHL
Time 7.5 10.5 1.0 12.0 C
L
50 pF
5.0 0.5 3.5 5.0 1.0 6.0
ns
C
L
15 pF
5.07.01.08.0 C
L
50 pF
t
PZL
3-STATE Output 3.3 0.3 6.8 10.5 1.0 12.5
ns
R
L
1 k C
L
15 pF
t
PZH
Enable Time 9.3 14.0 1.0 16.0 C
L
50 pF
5.0 0.5 4.7 7.2 1.0 8.5
ns
C
L
15 pF
6.2 9.2 1.0 10.5 C
L
50 pF
t
PLZ
3-STATE 3.3 0.3 11.2 15.4 1.0 17.5
ns
R
L
1 k C
L
50 pF
t
PHZ
Output 5.0 0.5 6.0 8.8 1.0 10.0 C
L
50 pF
Disable Time
t
OSLH
Output to Output Skew 3.3 0.3 1.5 1.5
ns
(Note 4) C
L
50 pF
t
OSHL
5.0 0.5 1.0 1.0 C
L
50 pF
C
IN
Input Capacitance 4 10 10 pF V
CC
Open
C
OUT
Output Capacitance 6 pF V
CC
5.0V
C
PD
Power Dissipation Capacitance 18 pF (Note 5)