Analog Frequency Multiplier

PL660 and PL663 XO Families

47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990, FAX (510) 492-0991

www.phaselink.com

Rev. 3/20/07 Page 4

BOARD LAYOUT CONSIDERATIONS AND CRYSTAL SPECIFICATIONS

BOARD LAYOUT CONSIDERATIONS

To minimize parasitic effects and improve performance, do the following:

•

Place the crystal as close as possible to the IC.

•

Make the board traces that are connected to the crystal pins symmetrical. The board trace

symmetry is very important, as it reduces the negative parasitic effects to produce clean

frequency multiplication with low jitter.

CRYSTAL SPECIFICATIONS

CL (xtal)

C0

C0/C1

Part Number

Crystal

Resonator

Frequency

Mode

Typical

Max.

Max.

Max.

PL660-08

PL660-09

25~75MHz

Fundamental or

3rd overtone

5 pF

4.5 pF

N.A.

PL663-07

PL663-08

PL663-09

30~80MHz

Fundamental or

3rd overtone

5 pF

4.5 pF

N.A.

PL663-17

PL663-18

PL663-19

75~140MHz

Fundamental or

3rd overtone

5 pF

4.0 pF

N.A.

PL663-28

PL663-29

140~200MHz

Fundamental or

3rd overtone

5 pF

4.0 pF

N.A.

Note: Non-specified parameters can be chosen as standard values from crystal suppliers.

CL ratings larger than 5pF require a crystal frequency adjustment.

Request detailed crystal specifications from PhaseLink.