PE3239EK PEREGRINE [Peregrine Semiconductor Corp.], PE3239EK Datasheet - Page 7

• Manufacturer Part Number: PE3239EK
• Description: 2.2 GHz Integer-N PLL for Low Phase Noise Applications
• Manufacturer: PEREGRINE [Peregrine Semiconductor Corp.]

PE3239
Product Specification
Functional Description
The PE3239 consists of a prescaler, counters, a
phase detector, charge pump and control logic.
The dual modulus prescaler divides the VCO
frequency by either 10 or 11, depending on the
value of the modulus select. Counters “R” and “M”
divide the reference and prescaler output,
respectively, by integer values stored in a 20-bit
register.
the modulus select logic.
Figure 6. Functional Block Diagram
Document No. 70-0047-02 │ www.psemi.com
Control
An additional counter (“A”) is used in
Sdata
Pins
F
F
in
in
f
r
Control
Logic
Prescaler
Modulus
Select
10/11
R(5:0)
M(8:0)
A(3:0)
M Counter
R Counter
(6-bit)
(9-bit)
f
f
The phase-frequency detector generates up and
down frequency control signals which direct the
charge pump operation. The control logic includes
a selectable chip interface. Data is written into the
internal registers via the three wire serial bus.
There are also various operational and test modes
and a lock detect output.
c
p
Detector
Phase
©2006 Peregrine Semiconductor Corp. All rights reserved.
PD_U
PD_D
Charge
Pump
CP
LD
Cext
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