Both the ICS525-01 and ICS525-02 meet your requirements.

ICS525-01 frequency calculator results
 

Results for:
desired input frequency = 20.0 MHz
desired output frequency = 50.0 MHz
desired output frequency accuracy = 100 ppm
Vdd= 3.3V
operating temperature = 0 to 70 deg C

Solutions for the ICS525-01:

Out freq error ppm VCO divider ref divider VDW RDW OD duty cycle spec

best accuracy

50.000000

0.0

15

3

7

1

4

45 - 55%

lowest jitter

50.000000

0.0

15

3

7

1

4

45 - 55%

lowest Idd

50.000000

0.0

15

6

7

4

2

45 - 55%

Set the input pins on the ICS525-01 according to this table:

S2

S1

S0

R6

R5

R4

R3

R2

R1

R0

V8

V7

V6

V5

V4

V3

V2

V1

V0

Out freq error ppm pin 5

4

3

2

1

28

27

26

25

24

18

17

16

15

14

13

12

11

10

best accuracy

50.000000

0.0

0

1

1

0

0

0

0

0

0

1

0

0

0

0

0

0

1

1

1

lowest jitter

50.000000

0.0

0

1

1

0

0

0

0

0

0

1

0

0

0

0

0

0

1

1

1

lowest Idd

50.000000

0.0

0

0

1

0

0

0

0

1

0

0

0

0

0

0

0

0

1

1

1


Press the "Back" button on your web browser to revise your inputs.
[Clear Input Form]

ICS525-02 frequency calculator results
 

Results for:
desired input frequency = 20.0 MHz
desired output frequency = 50.0 MHz
desired output frequency accuracy = 100 ppm
Vdd= 3.3V
operating temperature = 0 to 70 deg C

Solutions for the ICS525-02:

Out freq error ppm VCO divider ref divider VDW RDW OD duty cycle spec

best accuracy

50.000000

0.0

10

2

2

0

4

45 - 55%

lowest jitter

50.000000

0.0

10

2

2

0

4

45 - 55%

lowest Idd

50.000000

0.0

10

8

2

6

1

35 - 65%

Set the input pins on the ICS525-02 according to this table:

S2

S1

S0

R6

R5

R4

R3

R2

R1

R0

V8

V7

V6

V5

V4

V3

V2

V1

V0

Out freq error ppm pin 5

4

3

2

1

28

27

26

25

24

18

17

16

15

14

13

12

11

10

best accuracy

50.000000

0.0

0

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

lowest jitter

50.000000

0.0

0

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

lowest Idd

50.000000

0.0

1

1

0

0

0

0

0

1

1

0

0

0

0

0

0

0

0

1

0


Press the "Back" button on your web browser to revise your inputs.
[Clear Input Form]

Choosing Between the ICS525-01 and ICS525-02
The differences between the ICS525-01 and -02 are primarily cost and performance. The -01 is the lower cost part ; the -02 the higher performance.
The ICS525-02 will operate to higher frequencies and typically has one third lower jitter than the -01 at 3.3V.
If this calculator produces acceptable solutions for both the -01 and -02, then the choice is based on price/performance. Where low cost is critical, use the -01 and where lower jitter is required, use the -02.