Datasheet
SN74HC74-Q1
DUAL D-TYPE POSITIVE-EDGE-TRIGGERED FLIP-FLOP
WITH CLEAR AND PRESET
SCLS577A − MARCH 2004 − REVISED APRIL 2008
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
T
A
= 25°C
MIN
MAX
UNIT
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX
MIN MAX UNIT
2 V 1.9 1.998 1.9
I
OH
= −20 µA
4.5 V 4.4 4.499 4.4
V
OH
V
I
= V
IH
or V
IL
I
OH
20
µA
6 V 5.9 5.999 5.9
V
V
OH
V
I
V
IH
or
V
IL
I
OH
= −4 mA 4.5 V 3.98 4.3 3.7
V
I
OH
= −5.2 mA 6 V 5.48 5.8 5.2
2 V 0.002 0.1 0.1
I
OL
= 20 µA
4.5 V 0.001 0.1 0.1
V
OL
V
I
= V
IH
or V
IL
I
OL
20
µA
6 V 0.001 0.1 0.1
V
V
OL
V
I
V
IH
or
V
IL
I
OL
= 4 mA 4.5 V 0.17 0.26 0.4
V
I
OL
= 5.2 mA 6 V 0.15 0.26 0.4
I
I
V
I
= V
CC
or 0 6 V ±0.1 ±100 ±1000 nA
I
CC
V
I
= V
CC
or 0, I
O
= 0 6 V 4 80 µA
C
i
2 V to 6 V 3 10 10 pF
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
V
T
A
= 25°C
MIN
MAX
UNIT
V
CC
MIN MAX
MIN MAX UNIT
2 V 6 4.2
f
clock
Clock frequency
4.5 V
31 21
MHz
f
clock
Clock
frequency
6 V 0 36 0 25
MHz
2 V 100 150
PRE or CLR low
4.5 V 20 30
t
Pulse duration
PRE
or
CLR
low
6 V 17 25
ns
t
w
Pulse duration
2 V 80 120
ns
CLK high or low
4.5 V 16 24
CLK
high
or
low
6 V 14 20
2 V 100 150
Data
4.5 V 20 30
t
Setup time before CLK↑
Data
6 V 17 25
ns
t
su
Setup time before CLK↑
2 V 25 40
ns
PRE or CLR inactive
4.5 V 5 8
PRE
or
CLR
inactive
6 V 4 7
2 V 0 0
t
h
Hold time, data after CLK↑
4.5 V
0 0
ns
h
,
6 V 0 0