Datasheet

www.fairchildsemi.com 4
MM74HCT245
AC Electrical Characteristics
V
CC
5.0V, t
r
t
f
6 ns, T
A
25 C (unless otherwise specified)
AC Electrical Characteristics
V
CC
5.0V 10%, t
r
t
f
6 ns (unless otherwise specified)
Note 5: C
PD
determines the no load power consumption, P
D
C
PD
V
CC
2 f I
CC
V
CC
, and the no load dynamic current consumption,
I
S
C
PD
V
CC
f I
CC
.
Symbol Parameter Conditions Typ
Guaranteed
Units
Limit
t
PHL
, t
PLH
Maximum Output C
L
45 pF 16 20 ns
Propagation Delay
t
PZL
, t
PZH
Maximum Output C
L
45 pF 29 40 ns
Enable Time R
L
1 k
t
PLZ
, t
PHZ
Maximum Output C
L
5 pF 20 25 ns
Disable Time R
L
1 k
Symbol Parameter Conditions
T
A
25 CT
A
40 to 85 CT
A
55 to 125 C
Units
Typ Guaranteed Limits
t
PHL
, t
PLH
Maximum Output C
L
50 pF 17 23 29 34 ns
Propagation Delay C
L
150 pF 24 30 38 45 ns
t
PZL
Maximum Output R
L
1 k 31 42 53 63 ns
Enable Time C
L
50 pF
t
PZH
Maximum Output R
L
1 k 23 33 41 49 ns
Enable Time C
L
50 pF
t
PHZ
, t
PLZ
Maximum Output R
L
1 k 21 30 38 45 ns
Disable Time C
L
50 pF
t
THL
, t
TLH
Maximum Output C
L
50 pF 8 12 15 18 ns
Rise and Fall Time
C
IN
Maximum Input 10 15 15 15 pF
Capacitance
C
OUT
Maximum Output/Input 20 25 25 25 pF
Capacitance
C
PD
Power Dissipation G V
CC
(Note 5) 7 pF
Capacitance G
GND 100 pF