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2021 Microchip Technology Inc. and its subsidiaries

DS20006628A-page 7

SY87700AL

FIGURE 3-1:

Loop Filter Components.

TABLE 3-1:

FREQUENCY SELECTION TABLE

FREQSEL1

FREQSEL2

FREQSEL3

0

1

1

6

125 Mbps to 208 Mbps

1

0

0

8

94 Mbps to 156 Mbps

1

0

1

12

63 Mbps to 104 Mbps

1

1

0

16

47 Mbps to 78 Mbps

1

1

1

24

32 Mbps to 52 Mbps

0

1

0

—

Undefined

0

0

X (Note 2)

—

Undefined

Note 1: SY87700AL operates from 32 MHz to 208 MHz. For higher speed applications, the SY87701AL operates

from 28 MHz to 1300 MHz.

2: X is a Don’t Care.

TABLE 3-2:

REFERENCE FREQUENCY SELECTION

DIVSEL1

DIVSEL2

0

0

8

0

1

10

1

0

16

1

1

20

R5

C3

PLLSP

PLLSN

R6

C4

PLLRP

PLLRN

Note:

Suggested values. Values may vary for different applications.

R5 = 350Ω

C3 = 1.0 µF (X7R Dielectric)

R6 = 680Ω

C4 = 1.0 µF (X7R Dielectric)