ASM3I2769AG-08SR PULSECORE [PulseCore Semiconductor], ASM3I2769AG-08SR Datasheet

ASM3I2769AG-08SR

Manufacturer Part Number

ASM3I2769AG-08SR

Description

Low Power Peak EMI Reducing Solution

Manufacturer

PULSECORE [PulseCore Semiconductor]

Datasheet

1.ASM3I2769AG-08SR.pdf (12 pages)

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XOUT

January 2007

rev 1.9

Features

Product Description

The ASM3P2769A is a versatile spread spectrum

frequency modulator designed specifically for a wide

range of clock frequencies. The ASM3P2769A reduces

electromagnetic interference (EMI) at the clock source,

allowing system wide reduction of EMI of

dependent signals. The ASM3P2769A allows significant

system cost savings by reducing the number of circuit

board layers ferrite beads, shielding that are traditionally

required to pass EMI regulations.

Block Diagram

XIN

•

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

Generates an EMI optimized clock signal at the

Integrated loop filter components.

Operates with a 3.3V / 2.5V Supply

Operating current less than 4mA.

Low power CMOS design.

Input frequency range: 6MHz to 12MHz for 2.5V.

Generates a 1X low EMI spread spectrum clock of

Frequency deviation: ±1% @ 10MHz

Available in 6 pin TSOT-23, 8 pin SOIC and

8 pin TSSOP Packages.

output.

the input frequency.

Oscillator

Crystal

: 6MHz to 13MHz for 3.3V.

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

Frequency

Low Power Peak EMI Reducing Solution

Feedback

Divider

PulseCore Semiconductor Corporation

VDD

VSS

www.pulsecoresemi.com

all clock

Modulation

Detector

Phase

The ASM3P2769A uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented by using a proprietary all digital method.

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 ASM3P2769A is targeted towards all portable

devices with very low power requirements like MP3

players and digital still cameras.

Key Specifications

Supply voltages

Cycle-to-Cycle Jitter

Output Duty Cycle

Modulation Rate Equation

Frequency Deviation

The ASM3P2769A modulates the output of a single PLL

Loop

Filter

Description

VCO

PLL

VDD = 3.3V / 2.5V

200pS (Max)

45/55%

±1% @ 10MHz

ASM3P2769A

/256

Specification

Divider

Output

ModOUT

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ASM3I2769AG-08SR Summary of contents

Page 1

January 2007 rev 1.9 Low Power Peak EMI Reducing Solution Features • Generates an EMI optimized clock signal at the output. • Integrated loop filter components. • Operates with a 3.3V / 2.5V Supply • Operating current less than 4mA. ...

Page 2

January 2007 rev 1. 9 Pin Configuration (6-pin TSOT-23 Package) Pin Description Pin# Pin Name Type Power-down control pin. Pull low to enable power-down mode. Connect to VDD if not used. 2 XOUT O Crystal connection. If ...

Page 3

January 2007 rev 1. 9 Pin Configuration (8-pin SOIC and TSSOP Packages) Pin Description Pin# Pin Name Type Crystal connection or external reference frequency input. This pin has dual functions XIN/CLKIN I can be connected either to an ...

Page 4

January 2007 rev 1. 9 Absolute Maximum Ratings Symbol VDD, V Voltage on any pin with respect to Ground IN T Storage temperature STG T Operating temperature A T Max. Soldering Temperature (10 sec Junction Temperature J Static ...

Page 5

January 2007 rev Electrical Characteristics for 3.3V Supply (Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated). Symbol Parameter V Input low voltage IL V Input high voltage IH I Input low current ...

Page 6

January 2007 rev 1. 9 Typical Crystal Oscillator Circuit Typical Crystal Specifications Fundamental AT cut parallel resonant crystal Nominal frequency Frequency tolerance Operating temperature range Storage temperature Load capacitance Shunt capacitance ESR Low Power Peak EMI Reducing Solution Notice: The ...

Page 7

January 2007 rev 1. 9 Package Information Symbol θ Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 6-pin TSOT-23 Package ...

Page 8

January 2007 rev Symbol θ Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 8-Pin SOIC ...

Page 9

January 2007 rev Symbol θ Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 8-Pin TSSOP ...

Page 10

... F6LL ASM3I2769AG-08TT 3I2769AG ASM3I2769AG-08TR 3I2769AG ASM3I2769AG-08ST 3I2769AG ASM3I2769AG-08SR 3I2769AG Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. Package Type 6-Pin TSOT-23, TAPE & REEL, Pb Free 8-Pin TSSOP, TUBE, Pb Free 8-Pin TSSOP, TAPE & REEL, Pb Free 8-Pin SOIC, TUBE, Pb Free 8-Pin SOIC, TAPE & ...

Page 11

January 2007 rev 1. 9 Device Ordering Information Licensed under U.S Patent Nos 5,488,627 and 5,631,921 Low Power Peak EMI Reducing Solution Notice: The ...

Page 12

January 2007 rev 1. 9 PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 © ...

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