ASM3P2107A datasheet, PDF - EEWORLD Datasheet

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ASM3P2107A: DescriptionPeak EMI Reducing Solution; File Size297KB，7 Pages; ManufacturerPulseCore Semiconductor Corporation

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ASM3P2107A Overview

Peak EMI Reducing Solution

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November 2006

rev 0.4

Peak EMI Reducing Solution

Features

•

ASM3P2107A

savings by reducing the number of circuit board layers

ferrite beads, shielding and other passive components

that are traditionally required to pass EMI regulations.

The ASM3P2107A uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented in a proprietary all digital method.

The ASM3P2107A 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’.

FCC approved method of EMI attenuation.

Generates a 1X low EMI spread spectrum clock of

the input frequency.

Input frequency range: 12MHz to 22MHz.

Internal loop filter minimizes external components

and board space.

Frequency deviation: - 0.8%( Typ) @20MHz.

Low cycle-to-cycle jitter.

5.0V ± 5% operating voltage range.

TTL or CMOS compatible outputs.

Available in 8-pin TSSOP and SOIC package

Product Description

The ASM3P2107A is a versatile spread spectrum

frequency modulator designed specifically for input clock

frequencies from 12MHz to 22MHz. The ASM3P2107A

can generate an EMI reduced clock from crystal, ceramic

resonator, or system clock.

The ASM3P2107A reduces electromagnetic interference

(EMI) at the clock source, allowing system wide reduction

of EMI of

down stream clock and data dependent

signals. The ASM3P2107A allows significant system cost

Applications

The ASM3P2107A is targeted towards EMI management

for high speed digital applications such as PC peripheral

devices, consumer electronics and embedded controller

systems.

Block Diagram

Modulation

XIN

XOUT

Crystal

Oscillator

Frequency

Divider

Feedback

Divider

Phase

Detector

Loop

Filter

PLL

VCO

Output

Divider

CLOCKOUT

GND

PulseCore Semiconductor Corporation

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

•

Tel: 408-879-9077

•

Fax: 408-879-9018

www.pulsecoresemi.com

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

ASM3P2107A Related Products

	ASM3P2107A	ASM3P2107AF-08-TR	ASM3P2107AG-08-SR	ASM3P2107AG-08-ST	ASM3P2107AG-08-TR	ASM3P2107AG-08-TT
Description	Peak EMI Reducing Solution	Peak EMI Reducing Solution	Peak EMI Reducing Solution	Peak EMI Reducing Solution	Peak EMI Reducing Solution	Peak EMI Reducing Solution
Is it Rohs certified?	-	conform to	conform to	conform to	conform to	conform to
Maker	-	PulseCore Semiconductor Corporation	PulseCore Semiconductor Corporation	PulseCore Semiconductor Corporation	PulseCore Semiconductor Corporation	PulseCore Semiconductor Corporation
package instruction	-	ROHS COMPLIANT, TSSOP-8	GREEN, SOIC-8	GREEN, SOIC-8	GREEN, TSSOP-8	GREEN, TSSOP-8
Reach Compliance Code	-	unknow	unknow	unknow	unknow	unknow
JESD-30 code	-	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8
length	-	4.4 mm	4.9 mm	4.9 mm	4.4 mm	4.4 mm
Number of terminals	-	8	8	8	8	8
Maximum operating temperature	-	70 °C	70 °C	70 °C	70 °C	70 °C
Maximum output clock frequency	-	22 MHz	22 MHz	22 MHz	22 MHz	22 MHz
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	TSSOP	SOP	SOP	TSSOP	TSSOP
Package shape	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	-	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
Master clock/crystal nominal frequency	-	22 MHz	22 MHz	22 MHz	22 MHz	22 MHz
Certification status	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	1.1 mm	1.75 mm	1.75 mm	1.1 mm	1.1 mm
Maximum supply voltage	-	5.25 V	5.25 V	5.25 V	5.25 V	5.25 V
Minimum supply voltage	-	4.75 V	4.75 V	4.75 V	4.75 V	4.75 V
Nominal supply voltage	-	5 V	5 V	5 V	5 V	5 V
surface mount	-	YES	YES	YES	YES	YES
technology	-	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	-	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL
Terminal form	-	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	-	0.65 mm	1.27 mm	1.27 mm	0.65 mm	0.65 mm
Terminal location	-	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
width	-	3 mm	3.91 mm	3.91 mm	3 mm	3 mm
uPs/uCs/peripheral integrated circuit type	-	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER

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