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ASM3I2579AG-06OR

更新时间： 2024-11-17 06:38:07

品牌	Logo	应用领域
PULSECORE		晶体时钟发生器微控制器和处理器外围集成电路光电二极管
页数	文件大小	规格书
12页	176K
描述
Low Power Peak EMI Reducing Solution

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中文翻译

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技术参数
数据手册

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ASM3I2579AG-06OR 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	GREEN, TSOT-23, 6 PIN	Reach Compliance Code：	unknown
风险等级：	5.74	Is Samacsys：	N
其他特性：	ALSO OPERATES AT 3.3V SUPPLY	JESD-30 代码：	R-PDSO-G6
JESD-609代码：	e3	长度：	2.9 mm
端子数量：	6	最高工作温度：	85 °C
最低工作温度：	-40 °C	最大输出时钟频率：	30 MHz
封装主体材料：	PLASTIC/EPOXY	封装代码：	VSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	260	主时钟/晶体标称频率：	30 MHz
认证状态：	Not Qualified	座面最大高度：	1 mm
最大供电电压：	2.625 V	最小供电电压：	2.375 V
标称供电电压：	2.5 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	TIN	端子形式：	GULL WING
端子节距：	0.95 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	1.6 mm
uPs/uCs/外围集成电路类型：	CLOCK GENERATOR, OTHER	Base Number Matches：	1

ASM3I2579AG-06OR 数据手册

January 2007

rev 1.1

ASM3P2579A

Low Power Peak EMI Reducing Solution

Features

The ASM3P2579A uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented by using a proprietary all digital method.

•

Generates an EMI optimized clock signal at the

output.

•

Integrated loop filter components.

Operates with a 3.3 / 2.5V Supply.

Operating current less than 4mA.

Low power CMOS design.

Input frequency range: 12MHz to 30MHz for 2.5V

: 12MHz to 30MHz for 3.3V

Generates a 1X low EMI spread spectrum clock of

the input frequency.

Spread Spectrum Enable Control.

Frequency deviation: ±1% @ 24MHz

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

TSSOP Packages.

The ASM3P2579A 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 ASM3P2579A is targeted towards all portable

devices with very low power requirements like MP3

players and digital still cameras.

Product Description

The ASM3P2579A is

a versatile spread spectrum

Key Specifications

frequency modulator designed specifically for a wide

range of clock frequencies. The ASM3P2579A reduces

electromagnetic interference (EMI) at the clock source,

allowing system wide reduction of EMI of all clock

dependent signals. The ASM3P2579A allows significant

system cost savings by reducing the number of circuit

board layers ferrite beads, shielding that are traditionally

required to pass EMI regulations.

Description

Supply voltages

Cycle-to-Cycle Jitter

Output Duty Cycle

Modulation Rate Equation

Frequency Deviation

Specification

VDD = 3.3V/2.5V

200pS (Max)

45/55% (worst case)

F_IN/640

±1% @ 24MHz

Block Diagram

VDD

SSON

PLL

Modulation

XIN

Crystal

Frequency

Divider

Oscillator

Output

Divider

Phase

Loop

XOUT

VCO

Detector

Filter

Feedback

Divider

ModOUT

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.

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中文翻译

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