e
e
e
e e
15 pF, t t 6 ns
r f
AC Electrical Characteristics V
5V, T
25 C, C
§
CC
A
L
Symbol
Parameter
Conditions
Typ
43
30
29
18
27
10
Guaranteed Limit
Units
MHz
ns
f
t
t
t
t
t
t
Maximum Operating Frequency
30
35
34
32
38
20
30
MAX
, t
PHL PLH
Maximum Propagation Delay, Clock to RC
Maximum Propagation Delay, Clock to Q
Maximum Propagation Delay, ENT to RC
, t
PHL PLH
ns
, t
PHL PLH
ns
Maximum Propagation Delay, Clear to Q or RC
Minimum Removal Time, Clear to Clock
ns
PHL
REM
S
ns
Minimum Set Up Time Clear, Load,
Enable or Data to Clock
ns
t
t
Minimum Hold Time, Data from Clock
5
ns
ns
H
Minimum Pulse Width Clock,
Clear, or Load
16
W
e
e
t
f
e
e
AC Electrical Characteristics C 50 pF, t
6 ns (unless otherwise specified)
L
r
74HC
40 to 85 C
54HC
55 to 125 C
T
A
25 C
§
eb
eb
T
A
T
§
Guaranteed Limits
§
Symbol
Parameter
Conditions
V
CC
Units
A
Typ
f
t
t
t
t
t
t
t
t
t
t
t
t
t
Maximum Operating
Frequency
2.0V
4.5V
6.0V
10
40
45
5
27
32
4
21
25
4
18
21
MHz
MHz
MHz
MAX
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PHL
REM
S
Maximum Propagation
Delay, Clock to RC
2.0V
4.5V
6.0V
100
32
28
215
43
37
271
54
46
320
64
54
ns
ns
ns
Maximum Propagation
Delay, Clock to RC
2.0V
4.5V
6.0V
88
18
15
175
35
30
220
44
37
260
52
44
ns
ns
ns
Maximum Propagation
Delay, Clock to Q
2.0V
4.5V
6.0V
95
30
26
205
41
35
258
52
44
305
61
52
ns
ns
ns
Maximum Propagation
Delay, Clock to Q
2.0V
4.5V
6.0V
85
17
14
170
34
29
214
43
36
253
51
43
ns
ns
ns
Maximum Propagation
Delay, ENT to RC
2.0V
4.5V
6.0V
90
28
24
195
39
33
246
49
42
291
58
49
ns
ns
ns
Maximum Propagation
Delay, ENT to RC
2.0V
4.5V
6.0V
80
16
14
160
32
27
202
40
34
238
48
41
ns
ns
ns
Maximum Propagation
Delay, Clear to RC
2.0V
4.5V
6.0V
100
32
28
220
44
37
275
55
47
325
66
55
ns
ns
ns
Maximum Propagation
Delay, Clear to Q
2.0V
4.5V
6.0V
100
32
28
210
42
36
260
52
45
315
63
54
ns
ns
ns
Minimum Removal Time
Clear to Clock
2.0V
4.5V
6.0V
125
25
21
158
32
27
186
37
32
ns
ns
ns
Minimum Setup
Time Clear or Data
to Clock
2.0V
4.5V
6.0V
150
30
26
190
38
32
225
45
38
ns
ns
ns
Minimum Setup
Time Load
to Clock
2.0V
4.5V
6.0V
135
27
23
170
34
29
200
41
35
ns
ns
ns
S
Minimum Setup
Time Enable
to Clock
2.0V
4.5V
6.0V
175
35
30
220
44
37
260
52
44
ns
ns
ns
S
Minimum Hold Time
Data from Clock
2.0V
4.5V
6.0V
50
10
9
63
13
11
75
15
13
ns
ns
ns
H
3
NSC [ National Semiconductor ]
