Datasheet > 微控制器和处理器 > 时钟发生器> ASM3I2111BG-08SR

ASM3I2111BG-08SR

更新时间： 2024-11-26 22:09:27

品牌	Logo	应用领域
ALSC		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
8页	208K
描述
Peak EMI Reducing Solution

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数据手册

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ASM3I2111BG-08SR 数据手册

May 2005

rev 0.1

ASM3P2111B

Peak EMI Reducing Solution

Features

allows significant system cost savings by reducing the

number of circuit board layers and shielding that are

required to pass EMI regulations. The ASM3P2111B

modulates the output of PLL in order to spread the

bandwidth of a synthesized clock, thereby decreasing 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

clock generators. Lowering EMI by increasing a signal’s

bandwidth is called spread spectrum clock generation.

Generates an EMI optimized clock at the output.

Input frequency: 25 MHz.

Frequency outputs:

60 MHz (unmodulated)

2 x 48 MHz (unmodulated)

66.6 MHz (modulated): -1.7% down spread

Modulation rate: 30 KHz.

Supply voltage range: 3.3V ± 0.3V.

Available in 8-pin SOIC Package.

Commercial and Industrial Temperature range.

RoHS Compliant

Applications

ASM3P2111B is targeted towards EMI management for

high speed digital applications such as PC peripheral

devices, consumer electronics and embedded controller

systems.

Product Description

The ASM3P2111B is

a versatile spread spectrum

frequency modulator that reduces electromagnetic

interference (EMI) at the clock source. The ASM3P2111B

Block Diagram

60 MHz

XIN /CLKIN

XOUT

Crystal

Oscillator

PLL1

48 MHz_1

48 MHz_2

48 MHz_1

PLL2

66.6 MHz

Modulated

Alliance Semiconductor

2575 Augustine Drive • Santa Clara CA • Tel: 408-855-4900 • Fax: 408-855-4999 • www.alsc.com

12 3 4 5 6 7 8

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