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X2782A-08SR

更新时间： 2024-02-15 13:54:14

品牌	Logo	应用领域
ALSC		晶体外围集成电路光电二极管时钟
页数	文件大小	规格书
11页	170K
描述
General Purpose EMI Reduction IC

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数据手册

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X2782A-08SR 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	TSSOP-8	Reach Compliance Code：	unknown
风险等级：	5.84	Is Samacsys：	N
JESD-30 代码：	R-PDSO-G8	长度：	4.4 mm
端子数量：	8	最高工作温度：	125 °C
最低工作温度：	-40 °C	最大输出时钟频率：	156 MHz
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	NOT SPECIFIED	主时钟/晶体标称频率：	78 MHz
认证状态：	Not Qualified	座面最大高度：	1.1 mm
最大供电电压：	3.6 V	最小供电电压：	3 V
标称供电电压：	3.3 V	表面贴装：	YES
技术：	CMOS	温度等级：	AUTOMOTIVE
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3 mm	uPs/uCs/外围集成电路类型：	CLOCK GENERATOR, OTHER
Base Number Matches：	1

X2782A-08SR 数据手册

July 2005

rev 1.5

P2781/82/84

General Purpose EMI Reduction IC

Features

other digital video and imaging applications. The P278xA

reduces electromagnetic interference (EMI) at the clock

source, which provides system wide reduction of EMI of

all clock dependent signals. The P278xA allows

significant system cost savings by reducing the number of

circuit board layers and shielding that are traditionally

required to pass EMI regulations.

Provides up to 15dB of EMI suppression

FCC approved method of EMI attenuation

Generates a 1X, 2X, and 4X low EMI spread

spectrum clock of the input frequency

Input frequency range from 3 to 78MHz

External loop filter for spread % adjustment

Spreading ranges from ±0.25% to ±5.0%

Ultra low cycle-to-cycle jitter

The P278xA uses the most efficient and optimized

modulation profile approved by the FCC. The P278xA

modulates the output of a single PLL in order to “spread”

Zero-cycle slip

the bandwidth of

a synthesized clock and, more

3.3V operating voltage range

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.

10 mA output drives

TTL or CMOS compatible outputs

Ultra-low power CMOS design

P278XA is available in 8 pin SOIC and TSSOP

Packages

Available for industrial and automotive

temperature ranges.

Applications

Product Description

The P278xA is a versatile spread spectrum frequency

modulator designed specifically for digital camera and

The P278xA is targeted towards MFP, xDSL, fax modem,

set-top box, USB controller, DSC, and embedded systems.

VDD

FS1

FS0

Block Diagram

PLL

Modulation

XIN /CLKIN

Frequency

Crystal

Divider

Output

Divider

Oscillator

XOUT

Phase

Detector

VCO

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.

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X2782A-08ST	ALSC	General Purpose EMI Reduction IC	获取价格
X2782A-08TR	ALSC	General Purpose EMI Reduction IC	获取价格
X2782A-08TT	ALSC	General Purpose EMI Reduction IC	获取价格
X2782AF-08SR	ALSC	General Purpose EMI Reduction IC	获取价格
X2782AF-08ST	ALSC	General Purpose EMI Reduction IC	获取价格
X2782AF-08TR	ALSC	General Purpose EMI Reduction IC	获取价格

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