CD74HC297 Datasheet, PDF (5/15 Pages) Texas Instruments – High-Speed CMOS Logic Digital Phase-Locked-Loop

CD54HC297, CD74HC297, CD74HCT297
Prerequisite For Switching Function
25^oC
-40^oC TO 85^oC
-55^oC TO 125^oC
PARAMETER
HC TYPES
Maximum Clock Frequency
K_CP
SYMBOL V_CC (V)
MIN
MAX
MIN
MAX
MIN
MAX UNITS
f_MAX
2
6
-
5
-
4
-
MHz
4.5
30
-
24
-
20
-
MHz
6
35
-
28
-
24
-
MHz
Maximum Clock Frequency
f_MAX
2
4
-
3
-
2
-
MHz
I/D_CP
4.5
20
-
16
-
13
-
MHz
6
24
-
19
-
15
-
MHz
Clock Pulse Width
K_CP
Clock Pulse Width
I/D_CP
Set-up Time
D/U, EN_CTR to K_CP
t_w
2
80
-
100
-
120
-
ns
4.5
16
-
20
-
24
-
ns
6
14
-
17
-
20
-
ns
t_W
2
125
-
155
-
190
-
ns
4.5
25
-
31
-
38
-
ns
6
21
-
26
-
32
-
ns
t_SU
2
100
-
125
-
150
-
ns
4.5
20
-
25
-
30
-
ns
6
17
-
21
-
26
-
ns
Hold Time
D/U, EN_CTR to K_CP
t_H
2
0
-
0
-
0
-
ns
4.5
0
-
0
-
0
-
ns
6
0
-
0
-
0
-
ns
HCT TYPES
Maximum Clock Frequency
f_MAX
4.5
30
-
24
-
20
-
MHz
K_CP
Maximum Clock Frequency
f_MAX
4.5
20
-
16
-
13
-
MHz
I/D_CP
Clock Pulse Width
K_CP
t_w
4.5
16
-
20
-
24
-
ns
Clock Pulse Width
I/D_CP
t_w
4.5
25
-
31
-
38
-
ns
Set-up Time
D/U, EN_CTR to K_CP
t_SU
4.5
20
-
25
-
30
-
ns
Hold Time
D/U, EN_CTR to K_CP
t_H
4.5
0
-
0
-
0
-
ns
Switching Specifications Input t_r, t_f = 6ns
PARAMETER
HC TYPES
Propagation Delay,
I/D_CP to I/D_OUT
TEST
SYMBOL CONDITIONS V_CC (V)
t_PLH, t_PHL C_L = 50pF
2
4.5
25^oC
TYP MAX
-
175
-
35
-40^oC TO 85^oC -55^oC TO 125^oC
MAX
MAX
UNITS
220
265
ns
44
53
ns
6
-
30
34
43
ns
5