Datasheet

December 1990 5
Philips Semiconductors Product specification
Octal D-type flip-flop; positive edge-trigger;
3-state
74HC/HCT574
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
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
WAVEFORMS+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PHL
/ t
PLH
propagation delay
CP to Q
n
47
17
14
150
30
26
190
35
33
225
45
38
ns 2.0
4.5
6.0
Fig.6
t
PZH
/ t
PZL
3-state output enable
time OE to Q
n
44
16
13
140
28
24
175
35
30
210
42
36
ns 2.0
4.5
6.0
Fig.7
t
PHZ
/ t
PLZ
3-state output disable
time OE to Q
n
39
14
11
125
25
21
155
31
26
190
38
32
ns 2.0
4.5
6.0
Fig.7
t
THL
/ t
TLH
output transition time 14
5
4
60
12
10
75
15
13
90
18
15
ns 2.0
4.5
6.0
Fig.6
t
W
clock pulse width
HIGH or LOW
80
16
14
14
5
4
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.6
t
su
set-up time
D
n
to CP
60
12
10
6
2
2
75
15
13
90
18
15
ns 2.0
4.5
6.0
Fig.8
t
h
hold time
D
n
to CP
5
5
5
0
0
0
5
5
5
5
5
5
ns 2.0
4.5
6.0
Fig.8
f
max
maximum clock pulse
frequency
6.0
30
35
37
112
133
4.8
24
28
4.0
20
24
MHz 2.0
4.5
6.0
Fig.6