ASM3I2879AF-08ST datasheet, PDF

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ASM3I2879AF-08ST: DescriptionLow Power Peak Reducing EMI Solution; CategoryThe embedded processor and controller Microcontrollers and processors; File Size171KB，12 Pages; ManufacturerPulseCore Semiconductor Corporation; Environmental Compliance

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ASM3I2879AF-08ST Overview

Low Power Peak Reducing EMI Solution

ASM3I2879AF-08ST Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	PulseCore Semiconductor Corporation
package instruction	ROHS COMPLIANT, SOIC-8
Reach Compliance Code	unknow
Other features	ALSO OPERATES WITH 3.3V SUPPLY
JESD-30 code	R-PDSO-G8
length	4.9 mm
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output clock frequency	30 MHz
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Master clock/crystal nominal frequency	30 MHz
Certification status	Not Qualified
Maximum seat height	1.75 mm
Maximum supply voltage	2.625 V
Minimum supply voltage	2.375 V
Nominal supply voltage	2.5 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	3.91 mm
uPs/uCs/peripheral integrated circuit type	CLOCK GENERATOR, OTHER

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January 2007

rev 1.5

Low Power Peak Reducing EMI 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.

Low power CMOS design.

Input frequency range: 13MHz to 30MHz for 2.5V

: 13MHz to 30MHz for 3.3V

Generates a 1X low EMI spread spectrum clock of

the input frequency.

Frequency deviation: ±1% @ 24MHz

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

TSSOP packages.

ASM3P2879A

The ASM3P2879A uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented by using a proprietary all digital method.

The ASM3P2879A 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 ASM3P2879A is targeted towards all portable

devices with very low power requirements like MP3

players, Notebooks and digital still cameras.

Product Description

The ASM3P2879A is a versatile spread spectrum

frequency modulator designed specifically for a wide

range of clock frequencies. The ASM3P2879A reduces

electromagnetic interference (EMI) at the clock source,

allowing system wide reduction of EMI of

all clock

dependent signals. The ASM3P2879A allows significant

system cost savings by reducing the number of circuit

board layers ferrite beads, shielding that are traditionally

required to pass EMI regulations.

Key Specifications

Description

Supply voltages

Cycle-to-Cycle Jitter

Output Duty Cycle

Modulation Rate Equation

Frequency Deviation

Specification

VDD = 2.5V / 3.3V

200pS (Max)

45/55%

/640

±1% @ 24MHz

Block Diagram

VDD

XIN

Crystal

Oscillator

Frequency

Divider

Feedback

Divider

Modulation

PLL

XOUT

Phase

Detector

Loop

Filter

VCO

Output

Divider

ModOUT

REFOUT

VSS

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.

ASM3I2879AF-08ST Related Products

	ASM3I2879AF-08ST	ASM3I2879AF-08TR	ASM3I2879AF-08TT	ASM3I2879AG-08SR	ASM3I2879AG-08ST	ASM3I2879AG-08TR	ASM3I2879AG-08TT	ASM3P2879A
Description	Low Power Peak Reducing EMI Solution	Low Power Peak Reducing EMI Solution	Low Power Peak Reducing EMI Solution	Low Power Peak Reducing EMI Solution	Low Power Peak Reducing EMI Solution	Low Power Peak Reducing EMI Solution	Low Power Peak Reducing EMI Solution	Low Power Peak Reducing EMI Solution
Is it Rohs certified?	conform to	conform to	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	PulseCore Semiconductor Corporation	PulseCore Semiconductor Corporation	-
package instruction	ROHS COMPLIANT, SOIC-8	ROHS COMPLIANT, TSSOP-8	ROHS COMPLIANT, TSSOP-8	GREEN, SOIC-8	GREEN, SOIC-8	GREEN, TSSOP-8	GREEN, TSSOP-8	-
Reach Compliance Code	unknow	unknow	unknow	unknow	unknow	unknow	unknow	-
Other features	ALSO OPERATES WITH 3.3V SUPPLY	ALSO OPERATES WITH 3.3V SUPPLY	ALSO OPERATES WITH 3.3V SUPPLY	ALSO OPERATES WITH 3.3V SUPPLY	ALSO OPERATES WITH 3.3V SUPPLY	ALSO OPERATES WITH 3.3V SUPPLY	ALSO OPERATES WITH 3.3V SUPPLY	-
JESD-30 code	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	-
length	4.9 mm	4.4 mm	4.4 mm	4.9 mm	4.9 mm	4.4 mm	4.4 mm	-
Number of terminals	8	8	8	8	8	8	8	-
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	-
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-
Maximum output clock frequency	30 MHz	30 MHz	30 MHz	30 MHz	30 MHz	30 MHz	30 MHz	-
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-
encapsulated code	SOP	TSSOP	TSSOP	SOP	SOP	TSSOP	TSSOP	-
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	-
Package form	SMALL OUTLINE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	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	NOT SPECIFIED	NOT SPECIFIED	-
Master clock/crystal nominal frequency	30 MHz	30 MHz	30 MHz	30 MHz	30 MHz	30 MHz	30 MHz	-
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	-
Maximum seat height	1.75 mm	1.1 mm	1.1 mm	1.75 mm	1.75 mm	1.1 mm	1.1 mm	-
Maximum supply voltage	2.625 V	2.625 V	2.625 V	2.625 V	2.625 V	2.625 V	2.625 V	-
Minimum supply voltage	2.375 V	2.375 V	2.375 V	2.375 V	2.375 V	2.375 V	2.375 V	-
Nominal supply voltage	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	-
surface mount	YES	YES	YES	YES	YES	YES	YES	-
technology	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	-
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	-
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	-
Terminal pitch	1.27 mm	0.65 mm	0.65 mm	1.27 mm	1.27 mm	0.65 mm	0.65 mm	-
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	-
Maximum time at peak reflow temperature	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	-
width	3.91 mm	3 mm	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	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	-

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