Philips Semiconductors
Product speci鏗乧ation
Dual 4-bit binary ripple counter
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
鈥?4HC/HCT/HCU/HCMOS Logic Family Specifications鈥?
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
(擄C)
74HC
SYMBOL
PARAMETER
74HC/HCT393
TEST CONDITIONS
UNIT V
WAVEFORMS
CC
(V)
ns
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.7
+25
鈭?0
to
+85
max.
155
31
26
55
11
9
175
35
30
95
19
16
100
20
17
100
20
17
5
5
5
5
24
28
鈭?0
to
+125
min. max.
190
38
32
70
14
12
210
42
36
110
22
19
120
24
20
120
24
20
5
5
5
4
20
24
min. typ. max. min.
t
PHL
/ t
PLH
propagation delay
nCP to nQ
0
t
PHL
/ t
PLH
propagation delay
nQ
n
to nQ
n+1
t
PHL
propagation delay
nMR to nQ
n
41
15
12
14
5
4
39
14
11
19
7
6
80
16
14
80
16
14
5
5
5
6
30
35
17
6
5
19
7
6
3
1
1
30
90
107
125
25
21
45
9
8
140
28
24
75
15
13
ns
Fig.7
ns
Fig.8
t
THL
/ t
TLH
output transition time
ns
Fig.7
t
W
clock pulse width
HIGH or LOW
master reset pulse
width; HIGH
removal time
nMR to nCP
maximum clock pulse
frequency
ns
Fig.7
t
W
ns
Fig.8
t
rem
ns
Fig.8
f
max
MHz
Fig.7
December 1990
5