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PE83336_14 Datasheet, PDF (4/12 Pages) Peregrine Semiconductor – 3000 MHz UltraCMOS® Integer-N PLL
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PE83336
Product Specification
Table 1. Pin Descriptions (continued)
Pin No.
(44-lead
CQFJ)
Pin
Name
Interface
Mode
Type
Description
30
fp
ALL
Output
Monitor pin for main divider output. Switching activity can be disabled through enhancement
register programming or by floating or grounding VDD pin 31.
31
VDD-fp
ALL
(Note 1) VDD for fp. Can be left floating or connected to GND to disable the fp output.
32
Dout
Serial,
Parallel
Output
Data Out. The MSEL signal and the raw prescaler output are available on Dout through
enhancement register programming.
33
VDD
ALL
(Note 1) Same as pin 1.
34
Cext
ALL
Output
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
43
LD
44
Enh
N/A
NC
ALL
ALL
Serial,
Parallel
ALL
Input
Output
Input
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”).
Enhancement mode. When asserted low (“0”), enhancement register bits are functional.
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.
©2010-2012 Peregrine Semiconductor Corp. All rights reserved.
Page 4 of 12
Document No. 70-0137-05 │ UltraCMOS® RFIC Solutions
Peregrine products are protected under one or more of the following U.S. Patents: http://patents.psemi.com
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