Philips Semiconductors
Product specification
Octal D-type flip-flop; positive edge-trigger;
3-state
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
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
3-state output enable
time OE to Q
n
3-state output disable
time OE to Q
n
output transition time
+25
typ.
47
17
14
44
16
13
39
14
11
14
5
4
80
16
14
60
12
10
5
5
5
6.0
30
35
14
5
4
6
2
2
0
0
0
37
112
133
max.
150
30
26
140
28
24
125
25
21
60
12
10
100
20
17
75
15
13
5
5
5
4.8
24
28
−40
to
+85
min.
max.
190
35
33
175
35
30
155
31
26
75
15
13
120
24
20
90
18
15
5
5
5
4.0
20
24
−40
to
+125
min.
max.
225
45
38
210
42
36
190
38
32
90
18
15
ns
74HC/HCT574
TEST CONDITIONS
UNIT V
CC
WAVEFORMS
(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
Fig.6
t
PZH
/ t
PZL
ns
Fig.7
t
PHZ
/ t
PLZ
ns
Fig.7
t
THL
/ t
TLH
ns
Fig.6
t
W
clock pulse width
HIGH or LOW
set-up time
D
n
to CP
hold time
D
n
to CP
maximum clock pulse
frequency
ns
Fig.6
t
su
ns
Fig.8
t
h
ns
Fig.8
f
max
MHz
Fig.6
December 1990
5
PHILIPS [ NXP SEMICONDUCTORS ]
