Document No. 70-0026-03 │ www.psemi.com
Page 1 of 15
©2003-2005 Peregrine Semiconductor Corp. All rights reserved.
Peregrine’s PE3236 is a high performance integer-N PLL
capable of frequency synthesis up to 2.2 GHz. The
superior phase noise performance of the PE3236 is ideal
for applications such as LMDS / MMDS / WLL basestations
and demanding terrestrial systems.

The PE3236 features a 10/11 dual modulus prescaler,
counters and a phase comparator as shown in Figure 1.
Counter values are programmable through either a serial or
parallel interface and can also be directly hard wired. This
programming flexibility, combined with the dual latch
architecture enabling ping-pong loading of the main divide
counter, makes these PLLs well suited as the core for
fractional-N or sigma-delta implementation.

The PE3236 is optimized for terrestrial applications. It is
manufactured on Peregrine’s UltraCMOS™ process, a
patented variation of silicon-on-insulator (SOI) technology
on a sapphire substrate, offering the performance of GaAs
with the economy and integration of conventional CMOS.
Product Specification
2200 MHz UltraCMOS™ Integer-N PLL
for Low Phase Noise Applications
Product Description
PE3236
Features
• 2.2 GHz operation
• ÷10/11 dual modulus prescaler
• Internal phase detector
• Serial, parallel or hardwired
programmable
• Low power— 22 mA at 3 V
• Q3236 PLL replacement
• Ultra-low phase noise
• Available in 44-lead PLCC package
Figure 1. Block Diagram
F
in
F
in
Prescaler
10 / 11
20
Main
Counter
20
Secon-
dary
20-bit
Latch
20
Primary
20-bit
Latch
Pre_en
M(6:0)
A(3:0)
R(3:0)
16
20
R Counter
f
r
Phase
Detector
6
6
f
c
f
p
8
D(7:0)
13
Sdata
PD_U
PD_D