Datasheet > 微控制器和处理器 > 时钟发生器> I1817BF-08TR

I1817BF-08TR

更新时间： 2024-01-24 12:16:33

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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技术参数
数据手册

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I1817BF-08TR 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	TSSOP-8	Reach Compliance Code：	unknown
风险等级：	5.79	JESD-30 代码：	R-PDSO-G8
长度：	4.4 mm	端子数量：	8
最高工作温度：	85 °C	最低工作温度：	-20 °C
最大输出时钟频率：	20 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：	20 MHz	认证状态：	Not Qualified
座面最大高度：	1.1 mm	最大供电电压：	5.5 V
最小供电电压：	2.7 V	标称供电电压：	3.3 V
表面贴装：	YES	技术：	CMOS
温度等级：	OTHER	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, VIDEO	Base Number Matches：	1

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.

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与I1817BF-08TR相关器件

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

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