Datasheet

©1988 Fairchild Semiconductor Corporation www.fairchildsemi.com
74AC245, 74ACT245 Rev. 1.5.0 6
74AC245, 74ACT245 — Octal Bidirectional Transceiver with 3-STATE Inputs/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,
A
n
to B
n
or B
n
to A
n
3.3 1.5 5.0 8.5 1.0 9.0 ns
5.0 1.5 3.5 6.5 1.0 7.0
t
PHL
Propagation Delay,
A
n
to B
n
or B
n
to A
n
3.3 1.5 5.0 8.5 1.0 9.0 ns
5.0 1.5 3.5 6.0 1.0 7.0
t
PZH
Output Enable Time 3.3 2.5 7.0 11.5 2.0 12.5 ns
5.0 1.5 5.0 8.5 1.0 9.0
t
PZL
Output Enable Time 3.3 2.5 7.5 12.0 2.0 13.5 ns
5.0 1.5 5.5 9.0 1.0 9.5
t
PHZ
Output Disable Time 3.3 2.0 6.5 12.0 1.0 12.5 ns
5.0 1.5 5.5 9.0 1.0 10.0
t
PLZ
Output Disable Time 3.3 2.0 7.0 11.5 1.5 13.0 ns
5.0 1.5 5.5 9.0 1.0 10.0
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,
A
n
to B
n
or B
n
to A
n
5.0 1.5 4.0 7.5 1.5 8.0 ns
t
PHL
Propagation Delay,
A
n
to B
n
or B
n
to A
n
5.0 1.5 4.0 8.0 1.0 9.0 ns
t
PZH
Output Enable Time 5.0 1.5 5.0 10.0 1.5 11.0 ns
t
PZL
Output Enable Time 5.0 1.5 5.5 10.0 1.5 12.0 ns
t
PHZ
Output Disable Time 5.0 1.5 5.5 10.0 1.0 11.0 ns
t
PLZ
Output Disable Time 5.0 2.0 5.0 10.0 1.5 11.0 ns
Symbol Parameter Conditions Typ. Units
C
IN
Input Capacitance V
CC
= OPEN 4.5 pF
C
I/O
Input/Output Capacitance V
CC
= 5.0V 15.0 pF
C
PD
Power Dissipation Capacitance V
CC
= 5.0V 45.0 pF