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

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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

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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.