Analog Frequency Multiplier
PL660 and PL663 XO Families
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
Crystal
Resonator
Frequency
(F
XIN
)
25~75MHz
CL (xtal)
Mode
Typical
Fundamental or
3rd overtone
Fundamental or
3rd overtone
Fundamental or
3rd overtone
Fundamental or
3rd overtone
Max.
Max.
Max.
ESR(R
E)
C0
C0/C1
Part Number
PL660-08
PL660-09
PL663-07
PL663-08
PL663-09
PL663-17
PL663-18
PL663-19
PL663-28
PL663-29
5 pF
30
Ω
4.5 pF
N.A.
30~80MHz
5 pF
30
Ω
4.5 pF
N.A.
75~140MHz
5 pF
60
Ω
4.0 pF
N.A.
140~200MHz
5 pF
60
Ω
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.
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990, FAX (510) 492-0991
www.phaselink.com
Rev. 3/20/07 Page 4
PLL [ PHASELINK CORPORATION ]
