Datasheet > ASM3P2274A-06-OR

ASM3P2274A-06-OR

更新时间： 2024-11-12 04:08:43

品牌	Logo	应用领域
PULSECORE		光电二极管
页数	文件大小	规格书
8页	313K
描述
Clock Generator, 120MHz, CMOS, PDSO6, TSOT-23, 6 PIN

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ASM3P2274A-06-OR 数据手册

November 2005

rev 0.3

ASM3P2274A

Low Power 4X Multiplier EMI Reduction IC

Features

The ASM3P2274A uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented by using a proprietary all digital method.

Generates a 4X EMI optimized clock signal at the

output.

Integrated loop filter components.

Operates with a 3.3 / 2.5V Supply.

Low power CMOS design.

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

: 12MHz to 30MHz for 3.3V.

Frequency deviation: -1.5% (Typ) @66MHz Output

Frequency.

Available in 6-pin TSOT-23 Package.

The ASM3P2274A 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’.

Product Description

Applications

The ASM3P2274 is

a versatile Spread Spectrum

The ASM3P2274A is targeted towards all portable

devices with very low power requirements like MP3

players,MFP, LCD Panel Module and digital still cameras.

Frequency Modulator designed specifically for a wide

range of clock frequencies. It provides a 4x Spread

Spectrum Modulated output from an input clock source.

The ASM3P2274A reduces electromagnetic interference

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

of EMI of all clock dependent signals. The ASM3P2274A

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

Specification

VDD = 3.3V / 2.5V

Supply voltages

Cycle-to-Cycle Jitter

Output Duty Cycle

360pS (Typ)

45/55%

Modulation Rate Equation

Frequency Deviation

F_IN/640

-1.5% (Typ) @ 66MHz Output

Block Diagram

VDD

PLL

Modulation

XIN/CLKIN

XOUT

Crystal

Frequency

Divider

Oscillator

Output

Divider

Phase

Loop

Filter

VCO

Detector

Feedback

Divider

ModOUT

VSS

Alliance Semiconductor

2575 Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com

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

12 3 4 5 6 7 8

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与ASM3P2274A-06-OR相关器件

型号	品牌	获取价格	描述	数据表
ASM3P2274AF-06OR	ONSEMI	获取价格	4X Multiplier EMI Reduction IC
ASM3P2274AF-06-OR	PULSECORE	获取价格	Clock Generator, 120MHz, CMOS, PDSO6, ROHS COMPLIANT, TSOT-23, 6 PIN
ASM3P2274AG-06-OR	PULSECORE	获取价格	Low Power 4X Multiplier EMI Reduction IC
ASM3P2474A	ONSEMI	获取价格	Peak EMI Reducing Solution
ASM3P2474A	PULSECORE	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2474A	ALSC	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2474AF-06OR	ONSEMI	获取价格	Peak EMI Reducing Solution
ASM3P2474AF-06OR	PULSECORE	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2474AF-06OR	ALSC	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2474AF-08SR	PULSECORE	获取价格	Low Power Peak EMI Reducing Solution

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