Data Sheet

©2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
74AC240, 74ACT240 Rev. 1.2.0 6
74AC240, 74ACT240 — Octal Buffer/Line Driver with 3-STATE Outputs
AC Electrical Characteristics for AC
Note:
6. Voltage range 3.3 is 3.3V ± 0.3V. Voltage range 5.0 is 5.0V ± 0.5V.
AC Electrical Characteristics for ACT
Note:
7. Voltage range 5.0 is 5.0V ± 0.5V.
Capacitance
Symbol Parameter V
CC
(V)
(6)
T
A
= +25°C,
C
L
= 50pF
T
A
= −40°C to +85°C,
C
L
= 50pF
UnitsMin. Typ. Max. Min. Max.
t
PLH
Propagation Delay
Data to Output
3.3 1.5 6.0 8.0 1.0 9.0 ns
5.0 1.5 4.5 6.5 1.0 7.0
t
PHL
Propagation Delay
Data to Output
3.3 1.5 5.5 8.0 1.0 8.5 ns
5.0 1.5 4.5 6.0 1.0 6.5
t
PZH
Output Enable Time 3.3 1.5 6.0 10.5 1.0 11.0 ns
5.0 1.5 5.0 7.0 1.0 8.0
t
PZL
Output Enable Time 3.3 1.5 7.0 10.0 1.0 11.0 ns
5.0 1.5 5.5 8.0 1.0 8.5
t
PHZ
Output Disable Time 3.3 1.5 7.0 10.0 1.0 10.5 ns
5.0 1.5 6.5 9.0 1.0 9.5
t
PLZ
Output Disable Time 3.3 1.5 7.5 10.5 1.0 11.5 ns
5.0 1.5 6.5 9.0 1.0 9.5
Symbol Parameter V
CC
(V)
(7)
T
A
= +25°C,
C
L
= 50pF
T
A
= −40°C to +85°C,
C
L
= 50pF
UnitsMin. Typ. Max. Min. Max.
t
PLH
Propagation Delay,
Data to Output
5.0 1.5 6.0 8.5 1.5 9.5 ns
t
PHL
Propagation Delay,
Data to Output
5.0 1.5 5.5 7.5 1.5 8.5 ns
t
PZH
Output Enable Time 5.0 1.5 7.0 8.5 1.0 9.5 ns
t
PZL
Output Enable Time 5.0 2.0 7.0 9.5 1.5 10.5 ns
t
PHZ
Output Disable Time 5.0 2.0 8.0 9.5 2.0 10.5 ns
t
PLZ
Output Disable Time 5.0 2.5 6.5 10.0 2.0 10.5 ns
Symbol Parameter Conditions Typ. Units
C
IN
Input Capacitance V
CC
= OPEN 4.5 pF
C
PD
Power Dissipation Capacitance V
CC
= 5.0V 45.0 pF