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PE83336 Datasheet, PDF (4/14 Pages) Peregrine Semiconductor Corp. – 3.0 GHz Integer-N PLL for Low Phase Noise Applications
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PE83336
Product Specification
Pin No.
(44-lead
CQFJ)
Pin
Name
Interface
Mode
Type
Description
30
fp
ALL
31
VDD-fp
ALL
32
Dout
Serial,
Parallel
Output
(Note 1)
Output
Monitor pin for main divider output. Switching activity can be disabled through
enhancement register programming or by floating or grounding VDD pin 31.
VDD for fp. Can be left floating or connected to GND to disable the fp output.
Data Out. The MSEL signal and the raw prescaler output are available on Dout through
enhancement register programming.
33
VDD
ALL
34
Cext
ALL
(Note 1)
Output
Same as pin 1.
Logical “NAND” of PD_U and PD_D terminated through an on chip, 2 kΩ series resistor.
Connecting Cext to an external capacitor will low pass filter the input to the inverting
amplifier used for driving LD.
35
VDD
ALL
36
PD_D
ALL
37
PD_U
ALL
38
VDD-fc
ALL
39
fc
ALL
40
GND
ALL
(Note 1)
Output
(Note 1)
Output
Same as pin 1.
PD_D is pulse down when fp leads fc.
PD_U is pulse down when fc leads fp.
VDD for fc can be left floating or connected to GND to disable the fc output.
Monitor pin for reference divider output. Switching activity can be disabled through
enhancement register programming or by floating or grounding VDD pin 38.
Ground.
41
GND
ALL
Ground.
42
fr
ALL
43
LD
ALL
Input
Output
Reference frequency input.
Lock detect and open drain logical inversion of CEXT. When the loop is in lock, LD is high
impedance, otherwise LD is a logic low (“0”).
44
Enh
Serial,
Parallel
Input
Enhancement mode. When asserted low (“0”), enhancement register bits are functional.
N/A
NC
ALL
No connection.
Note 1: All VDD pins are connected by diodes and must be supplied with the same positive voltage level.
VDD-fp and VDD-fp are used to power the fp and fc outputs and can alternatively be left floating or connected to GND to disable the fp and fc
outputs.
Note 2: All digital input pins have 70 kΩ pull-down resistors to ground.
Copyright  Peregrine Semiconductor Corp. 2003
Page 4 of 14
File No. 70/0137~01A
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