Datasheet

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SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range,
V
CC
= 5 V" 0.5 V (unless otherwise noted) (see Figure 1)
T
A
= 25°C SN54AC74 SN74AC74
UNIT
MIN MAX MIN MAX MIN MAX
UNIT
f
clock
Clock frequency 140 95 125 MHz
t
w
Pulse duration
PRE or CLR low 4.5 5.5 5
ns
t
w
Pulse duration
CLK
4.5 5.5 5
ns
t
su
Setup time, data before CLK↑
Data 3 4 3
ns
t
su
Setup time, data before CLK↑
PRE
or CLR inactive 0 0.5 0
ns
t
h
Hold time, data after CLK↑ 0.5 0.5 0.5 ns
switching characteristics over recommended operating free-air temperature range,
V
CC
= 3.3 V " 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
T
A
= 25°C SN54AC74 SN74AC74
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN TYP MAX MIN MAX MIN MAX
UNIT
f
max
100 125 70 95 MHz
t
PLH
PRE or CLR
Q or Q
3.5 8 12 1 13 2.5 13
ns
t
PHL
PRE or CLR Q or Q
4 10.5 12 1 14 3.5 13.5
ns
t
PLH
CLK
Q or Q
4.5 8 13.5 1 17.5 4 16
ns
t
PHL
CLK
Q or Q
3.5 8 14 1 13.5 3.5 14.5
ns
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V " 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
T
A
= 25°C SN54AC74 SN74AC74
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN TYP MAX MIN MAX MIN MAX
UNIT
f
max
140 160 95 125 MHz
t
PLH
PRE or CLR
Q or Q
2.5 6 9 1 9.5 2 10
ns
t
PHL
PRE or CLR Q or Q
3 8 9.5 1 10.5 2.5 10.5
ns
t
PLH
CLK
Q or Q
3.5 6 10 1 12 3 10.5
ns
t
PHL
CLK
Q or Q
2.5 6 10 1 10 2.5 10.5
ns
operating characteristics, V
CC
= 3.3 V, T
A
= 25°C
PARAMETER
TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance C
L
= 50 pF, f = 1 MHz 45 pF