ASM3I2531AF-08SR PULSECORE [PulseCore Semiconductor], ASM3I2531AF-08SR Datasheet

ASM3I2531AF-08SR

Manufacturer Part Number

ASM3I2531AF-08SR

Description

Low Frequency EMI Reduction

Manufacturer

PULSECORE [PulseCore Semiconductor]

Datasheet

1.ASM3I2531AF-08SR.pdf (8 pages)

Current page: 1 of 8
Download datasheet (348Kb)

February 2007

rev 1.4

Features

Product Description

The ASM3P2531A is a versatile spread spectrum

frequency modulator designed specifically for a wide

range of clock frequencies. It reduces electromagnetic

interference (EMI) at the clock source allowing system-

wide reduction of EMI of downstream clock and data

Block Diagram

CLKIN

•

1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018

FCC approved method of EMI attenuation.

Generates a low EMI spread spectrum of the

input clock frequency.

Optimized for input frequency range between

27MHz – 55MHz.

Internal loop filter minimizes external

components and board space.

Frequency Deviation: ±1.7%.

Low inherent Cycle-to-cycle jitter.

3.3 V ± 0.3V Operating Voltage.

Ultra low power CMOS design:3.0 mA @ 3.3 V.

Supports notebook VGA and other LCD timing

controller applications.

Available in 8-pin SOIC and TSSOP Packages.

Oscillator

Crystal

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

Feedback

Frequency

PulseCore Semiconductor Corporation

Divider

Low Frequency EMI Reduction

www.pulsecoresemi.com

Modulation

Detector

STOP

Phase

dependent signals. It allows significant system cost

savings by reducing the number of circuit board layers

and

regulations.

The ASM3P2531A modulates the output of a single PLL

in order to spread the bandwidth of a synthesized clock,

thereby decreasing the peak amplitudes of its harmonics.

This result in significantly lower system EMI compared to

the typical narrow band signal produced by oscillators

and most clock generators. Lowering EMI by increasing

a signal’s bandwidth is called spread spectrum clock

generation.

The ASM3P2531A uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented by using a proprietary all-digital method.

Applications

The ASM3P2531A is targeted toward the notebook VGA

chip and other displays using an LVDS interface, PC

peripheral devices, and embedded systems.

shielding

Loop

Filter

traditionally

VCO

PLL

required

ASM3P2531A

Output

Divider

pass

EMI

ModOUT

Related parts for ASM3I2531AF-08SR

Related keywords

ASM3I2531AF-08SR datasheet
ASM3I2531AF-08SR data sheet
ASM3I2531AF-08SR pdf datasheet
ASM3I2531AF-08SR component
ASM3I2531AF-08SR part
ASM3I2531AF-08SR distributor
ASM3I2531AF-08SR RoHS
ASM3I2531AF-08SR datasheet download