Datasheet

CD54AC112, CD74AC112
DUAL J-K NEGATIVE-EDGE-TRIGGERED FLIP-FLOPS
WITH CLEAR AND PRESET
SCHS325 – JANUARY 2003
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 8 9 MHz
t
Pulse duration
CLK high or low 63 55
ns
t
w
Pulse
duration
CLR or PRE low 56 49
ns
t
su
Setup time, before CLK↓ J or K 50 44 ns
t
h
Hold time, after CLK↓ J or K 0 0 ns
t
rec
Recovery time, before CLK↓ CLR↑ or PRE↑ 31 27 ns
timing requirements over recommended operating free-air temperature range, V
CC
= 3.3 V ± 0.3 V
(unless otherwise noted)
–55°C to
125°C
–40°C to
85°C
UNIT
MIN MAX MIN MAX
f
clock
Clock frequency 71 81 MHz
t
Pulse duration
CLK high or low 7 6
ns
t
w
Pulse
duration
CLR or PRE low 6.3 5.5
ns
t
su
Setup time, before CLK↓ J or K 5.6 4.9 ns
t
h
Hold time, after CLK↓ J or K 0 0 ns
t
rec
Recovery time, before CLK↓ CLR↑ or PRE↑ 3.5 3..1 ns
timing requirements over recommended operating free-air temperature0 range, V
CC
= 5 V ± 0.5 V
(unless otherwise noted)
–55°C to
125°C
–40°C to
85°C
UNIT
MIN MAX MIN MAX
f
clock
Clock frequency 100 114 MHz
t
Pulse duration
CLK high or low 5 4.4
ns
t
w
Pulse
duration
CLR or PRE low 4.5 3.9
ns
t
su
Setup time, before CLK↓ J or K 4 3.5 ns
t
h
Hold time, after CLK↓ J or K 0 0 ns
t
rec
Recovery time, before CLK↓ CLR↑ or PRE↑ 2.5 2.2 ns