Datasheet

CD54AC74, CD74AC74
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH CLEAR AND PRESET
SCHS231D – SEPTEMBER 1998 – REVISED DECEMBER 2002
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range, V
CC
= 1.5 V (unless
otherwise noted)
–55°C to
125°C
–40°C to
85°C
UNIT
MIN MAX MIN MAX
f
clock
Clock frequency 9 10 MHz
t
Pulse duration
PRE or CLR low 50 44
ns
t
w
Pulse
duration
CLK 56 49
ns
t
Setup time
Data 44 39 ns
t
su
S
e
t
up
ti
me
PRE
or CLR inactive ns
t
h
Hold time Data after CLK↑ 0 0 ns
t
rec
Recovery time, before CLK↑ CLR↑ or PRE↑ 34 30 ns
timing requirements over recommended operating free-air temperature range, V
CC
= 3.3 V ± 0.3 V
(unless otherwise noted) (see Figure 1)
–55°C to
125°C
–40°C to
85°C
UNIT
MIN MAX MIN MAX
f
clock
Clock frequency 79 90 MHz
t
Pulse duration
PRE or CLR low 5.6 4.9
ns
t
w
Pulse
duration
CLK 6.3 5.5
ns
t
Setup time
Data 4.9 4.3 ns
t
su
S
e
t
up
ti
me
PRE
or CLR inactive ns
t
h
Hold time Data after CLK↑ 0 0 ns
t
rec
Recovery time, before CLK↑ CLR↑ or PRE↑ 4.7 4.1 ns
timing requirements over recommended operating free-air temperature range, V
CC
= 5 V ± 0.5 V
(unless otherwise noted) (see Figure 1)
–55°C to
125°C
–40°C to
85°C
UNIT
MIN MAX MIN MAX
f
clock
Clock frequency 110 125 MHz
t
Pulse duration
PRE or CLR low 4 3.5
ns
t
w
Pulse
duration
CLK 4.5 3.9
ns
t
Setup time
Data 3.5 3.1 ns
t
su
S
e
t
up
ti
me
PRE
or CLR inactive ns
t
h
Hold time Data after CLK↑ 0 0 ns
t
rec
Recovery time, before CLK↑ CLR↑ or PRE↑ 2.7 2.4 ns