Data Sheet

5 www.fairchildsemi.com
74AC138 • 74ACT138
AC Electrical Characteristics for ACT
Note 8: Voltage Range 5.0 is 5.0V ± 0.5V
Capacitance
V
CC
T
A
= +25°CT
A
= −40°C to +85°C
Symbol Parameter (V)
C
L
= 50 pF C
L
= 50 pF
Units
(Note 8) Min Typ Max Min Max
t
PLH
Propagation Delay
5.0 1.5 7.0 10.5 1.5 11.5 ns
A
n
to O
n
t
PHL
Propagation Delay
5.0 1.5 6.5
10.5
1.5 11.5 ns
A
n
to O
n
t
PLH
Propagation Delay
5.0 2.5 8.0 11.5 2.0 12.5 ns
E
1
or E
2
to O
n
t
PHL
Propagation Delay
5.0 2.0 7.5 11.5 2.0 12.5 ns
E
1
or E
2
to O
n
t
PLH
Propagation Delay
5.0 2.5 8.0 12.0 2.0 13.0 ns
E
3
to On
t
PHL
Propagation Delay
5.0 2.0 6.5 10.5 1.5 11.5 ns
E
3
to On
Symbol Parameter Typ Units Conditions
C
IN
Input Capacitance 4.5 pF V
CC
= OPEN
C
PD
Power Dissipation Capacitance 60.0 pF V
CC
= 5.0V