©1988 Fairchild Semiconductor Corporation www.fairchildsemi.com
74AC273, 74ACT273 Rev. 1.6.0 6
74AC273, 74ACT273 — Octal D-Type Flip-Flop
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 Operating Requirements for AC
Note:
7. Voltage range 3.3 is 3.3V ± 0.3V. Voltage range 5.0 is 5.0V ± 0.5V.
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.
f
MAX
Maximum Clock Frequency 3.3 90 125 75 MHz
5.0 140 175 125
t
PLH
Propagation Delay,
Clock to Output
3.3 4.0 7.0 12.5 3.0 14.0 ns
5.0 3.0 5.5 9.0 2.5 10.0
t
PHL
Propagation Delay,
Clock to Output
3.3 4.0 7.0 13.0 3.5 14.5 ns
5.0 3.0 5.0 10.0 2.5 11.0
t
PHL
Propagation Delay,
MR
to Output
3.3 4.0 7.0 13.0 3.5 14.0 ns
5.0 3.0 5.0 10.0 2.5 10.5
Symbol Parameter V
CC
(V)
(7)
T
A
= +25°C,
C
L
= 50pF
T
A
= –40°C to +85°C,
C
L
= 50pF
UnitsTyp. Guaranteed Minimum
t
S
Setup Time, HIGH or LOW,
Data to CP
3.3 3.5 5.5 6.0 ns
5.0 2.5 4.0 4.5
t
H
Hold Time, HIGH or LOW,
Data to CP
3.3 –2.0 0 0 ns
5.0 –1.0 1.0 1.0
t
W
Clock Pulse Width, HIGH or LOW 3.3 3.5 5.5 6.0 ns
5.0 2.5 4.0 4.5
t
W
MR Pulse Width, HIGH or LOW 3.3 2.0 5.5 6.0 ns
5.0 1.5 4.0 4.5
t
rec
Recovery Time, MR to CP 3.3 1.5 3.5 4.5 ns
5.0 1.0 2.0 3.0