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I1817BF-08TR

更新时间： 2024-11-08 22:22:31

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 ISM频段
页数	文件大小	规格书
10页	303K
描述
Low-Power Mobile VGA EMI Reduction IC

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中文翻译

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数据手册

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I1817BF-08TR 数据手册

October 2003

rev 1.0

P1817A/B

Low-Power Mobile VGA EMI Reduction IC

Features

down stream clock and data dependent signals. The P1817

allows significant system cost savings by reducing the

number of circuit board layers ferrite beads, shielding and

other passive components that are traditionally required to

pass EMI regulations.

ꢀ

FCC approved method of EMI attenuation.

Generates a low EMI spread spectrum clock of the

input frequency.

ꢀ

Optimized for frequency range from:

P1817A – 20 to 30MHz. Operation

P1817B – 10 to 20MHz Operation

The P1817 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’.

Internal loop filter minimizes external components

and board space.

ꢀ

Two selectable spread ranges.

Low inherent cycle-to-cycle jitter.

3.3V or 5V operating voltage range.

TTL or CMOS compatible outputs.

Ultra-low power CMOS design.

ꢀ

3.17mA @3.3V, 10MHz | 6.20mA@5.0V, 10MHz

4.28mA @3.3V, 14MHz | 7.50mA @5.0V, 14MHz

5.50mA @3.3V, 20MHz | 9.50mA @5.0V, 20MHz

Supports notebook VGA and other LCD timing

controller applications.

The P1817 uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented in a proprietary all digital method.

ꢀ

SSON pin for Spread Spectrum On/Off and

Standby Mode controls.

Applications

Available in 8-pin SOIC and TSSOP.

The P1817 is targeted towards notebook VGA chip and

other displays using an LVDS interface, PC peripheral

devices, and embedded systems.

Product Description

The P1817 is a versatile spread spectrum frequency

modulator designed specifically for input clock frequencies.

The P1817 reduces electromagnetic interference (EMI) at

the clock source, allowing system wide reduction of EMI of

SR0

SSON

VDD

Block Diagram

PLL

Modulation

XIN

Crystal

Oscillator

Frequency

Divider

Output

Divider

Phase

Detector

Loop

Filter

VCO

XOUT

Feedback

Divider

ModOUT

Ref

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...10

中文翻译

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与I1817BF-08TR相关器件

型号	品牌	获取价格	描述	数据表
I1818A-08SR	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC
I1818A-08ST	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC
I1818A-08TR	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC
I1818A-08TT	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC
I1818B-08SR	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC
I1818B-08ST	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC
I1818B-08TR	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC
I1818B-08TT	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC
I1818C-08SR	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC
I1818C-08ST	ALSC	获取价格	Low Power Mobile VGA EMI Reduction IC

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