Philips Semiconductors
Product specification
Octal D-type flip-flop with reset;
positive-edge trigger
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I
CC
category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HC
SYMBOL PARAMETER
min.
t
PHL
/ t
PLH
propagation delay
CP to Q
n
propagation delay
MR to Q
n
output transition time
+25
typ.
41
15
13
44
16
14
19
7
6
80
16
14
14
5
4
17
6
5
−6
−2
−2
11
4
3
−6
−2
−2
20.6
103
122
max.
150
30
26
150
30
26
75
15
13
100
20
17
75
15
13
65
13
11
75
15
13
3
3
3
4.8
24
28
−40
to
+85
min.
max.
185
37
31
185
37
31
95
19
15
120
24
20
90
18
15
75
15
13
90
18
15
3
3
3
4.0
20
24
−40
to
+125
min.
max.
225
45
38
225
45
38
110
22
19
ns
74HC/HCT273
TEST CONDITIONS
UNIT V
WAVEFORMS
CC
(V)
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
Fig.6
t
PHL
ns
Fig.7
t
THL
/ t
TLH
ns
Fig.6
t
W
clock pulse width
HIGH or LOW
ns
Fig.6
t
W
master reset pulse width 60
LOW
12
10
removal time
MR to CP
set-up time
D
n
to CP
hold time
D
n
to CP
maximum clock pulse
frequency
50
10
9
60
12
10
3
3
3
6.0
30
35
ns
Fig.7
t
rem
ns
Fig.7
t
su
ns
Fig.8
t
h
ns
Fig.8
f
max
MHz
Fig.6
September 1993
5
PHILIPS [ NXP SEMICONDUCTORS ]
