7 www.fairchildsemi.com
MM74HC4538
AC Electrical Characteristics (Continued)
Note 6: C
PD
determines the no load dynamic consumption, P
D
= C
PD
V
CC
2
f+I
CC
V
CC
, and the no load dynamic current consumption, I
S
= V
CC
f + I
CC
.
Symbol Parameter Conditions
V
CC
T
A
=25°CT
A
=−40 to 85°CT
A
= −55 to 125°C
Units
Typ Guaranteed Limits
t
WQ
Output Pulse Width C
X
= 1000 pF Min 3.0V 10.5 9.4 µs
R
X
= 10 kΩ 5.0V 10.0 9.3 µs
Max 3.0V 10.5 11.6 µs
5.0V 10.0 10.7 µs
t
WQ
Output Pulse Width C
X
= 0.1µF Min 5.0V 0.63 0.602 0.595 ms
R
X
= 10k Max 5.0V 0.77 0.798 0.805 ms
C
IN
Maximum Input 25 pF
Capacitance (Pins 2 & 14)
C
IN
Maximum Input 5 10 10 10 pF
Capacitance (other inputs)
C
PD
Power Dissipation (per one shot) 150 pF
Capacitance (Note 6)
∆t
WQ
Pulse Width Match
Between Circuits in ±1%
Same Package
