November 2006

P2010A

rev 0.2

Notice: The information in this document is subject to change without notice.

PulseCore Semiconductor Corporation

1715 S. Bascom Ave Suite 200, Campbell, CA 95008

• Tel: 408-879-9077 • Fax: 408-879-9018

www.pulsecoresemi.com

Low Frequency EMI Reduction IC

Features

•

FCC approved method of EMI attenuation

•

Provides up to 20dB of EMI suppression

•

Generates a low EMI spread spectrum clock of the

input frequency

•

Optimized for 10MHz to 35MHz input frequency

range

•

Internal loop filter minimizes external components

and board space

•

4 selectable spread ranges

•

SSON control pin for spread spectrum enable and

disable options

•

Low Cycle-to-cycle jitter

•

Wide operating range (3V to 5V)

•

16mA output drives

•

TTL or CMOS compatible outputs

•

Low power CMOS design

•

Available in 8 pin SOIC and TSSOP Packages

Product Description

The P2010A is a selectable spread spectrum frequency

modulator designed specifically for PC peripheral and

embedded controller markets. The P2010A reduces

electromagnetic interference (EMI) at the clock source

which provides system wide reduction of EMI of all clock

dependent signals. The P2010A allows significant system

cost savings by reducing the number of circuit board layers

and shielding that are traditionally required to pass EMI

regulations.

The P2010A uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented in a proprietary all-digital method.

The P2010A modulates the output of a single PLL in order

to “spread” the bandwidth of a synthesized clock and, more

importantly, decreases the peak amplitudes of its

harmonics. This results in significantly lower system EMI

compared to the typical narrow band signal produced by

oscillators and most frequency generators. Lowering EMI

by increasing a signal’s bandwidth is called “spread

spectrum clock generation”.

Applications

The P2010A is targeted towards the embedded controller

market and PC peripheral markets including scanners,

facsimile, MFP’s, printers, PDA, IA, and GPS devices

.

Block Diagram

XOUT

XIN

ModOUT

VSS

Frequency

Divider

Feedback

Divider

Modulation

Phase

Detector

Loop

Filter

VCO

Output

Divider

PLL

VDD

SSON

FS0

SR1

Crystal

Oscillator