Philips Semiconductors
Product specification
8-bit synchronous binary down counter
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
+25
−40
to
+85
−40
to
+125
min.
max.
450
90
77
265
53
45
475
95
81
415
83
71
110
22
19
250
50
43
190
38
32
190
38
32
75
15
13
110
22
19
74HC/HCT40103
TEST CONDITIONS
UNIT V
WAVEFORMS
CC
(V)
ns
2.0
4.5
6.0
ns
2.0
4.5
6.0
ns
2.0
4.5
6.0
ns
2.0
4.5
6.0
ns
2.0
4.5
6.0
ns
2.0
4.5
6.0
ns
2.0
4.5
6.0
ns
2.0
4.5
6.0
ns
2.0
4.5
6.0
ns
2.0
4.5
6.0
Fig.11
Fig.10
Fig.9
Fig.9
Fig.7
Figs 7 and 8
Fig.9
Fig.9
Fig.8
Fig.7
min. typ. max. min. max.
t
PHL
/ t
PLH
propagation delay
CP to TC
96
35
28
t
PHL
/ t
PLH
propagation delay
TE to TC
50
18
14
t
PHL
/ t
PLH
propagation delay
PL to TC
102
37
30
t
PHL
propagation delay
MR to TC
83
30
24
t
THL
/ t
TLH
output transition time
19
7
6
t
W
clock pulse width
HIGH or LOW
165
33
28
t
W
master reset pulse width
LOW
125
25
21
t
W
preset enable pulse width
PL; LOW
125
25
21
t
rem
removal time
MR to CP or PL to CP
50
10
9
t
su
set-up time
PE to CP
75
15
13
1998 Jul 08
22
8
6
39
14
11
33
12
10
14
5
4
22
8
6
6
300
60
51
175
35
30
315
63
53
275
55
47
75
15
13
205
41
35
155
31
26
155
31
26
65
13
11
95
19
16
375
75
64
220
44
37
395
79
40
345
69
59
95
19
16
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
