p1819dg-08tt PulseCore Semiconductor, p1819dg-08tt Datasheet

p1819dg-08tt

Manufacturer Part Number

p1819dg-08tt

Description

Notebook Lcd Panel Emi Reduction Ic

Manufacturer

PulseCore Semiconductor

Datasheet

1.P1819DG-08TT.pdf (8 pages)

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XIN/CLKIN

March 2007

rev 1.9

Features

Product Description

The P1819 is a Versatile Spread Spectrum Frequency

Modulator designed specifically for input clock frequencies

from 20 to 40MHz. (Refer Input Frequency and Modulation

Rate

interference (EMI) at the clock source, allowing system

wide reduction of EMI of

dependent signals. The P1819 allows significant system

cost savings by reducing the number of circuit board layers

Block Diagram

XOUT

•

REF

1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018

FCC approved method of EMI attenuation.

Provides up to 15dB EMI reduction.

Generates a low EMI Spread Spectrum clock and a

non-spread reference clock of the input frequency.

Optimized for Frequency range from 20 to 40MHz.

Internal loop filter minimizes external components

and board space.

Selectable spread options: Down and Center.

Low Inherent Cycle-to-Cycle jitter.

Eight spread % selections: ±0.625% to –3.5%.

ModRate is compliant with ATI M7x VGA spec.

3.3V ± 0.3V Operating Voltage range.

Low power CMOS design.

Supports notebook VGA and other LCD timing

controller applications.

Power Down function for mobile application.

Available in Commercial temperature range.

Available in 8-pin SOIC and TSSOP Packages.

Table).

Oscillator

Crystal

The

P1819

down stream clock and data

reduces

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

Notebook LCD Panel EMI Reduction IC

Frequency

Feedback

Divider

PulseCore Semiconductor Corporation

electromagnetic

www.pulsecoresemi.com

D_C/NC PD#

Modulation

Detector

Phase

SRS

ferrite beads, shielding and other passive components that

are traditionally required to pass EMI regulations.

The P1819 modulates the output of a single PLL in order to

“spread” the bandwidth of a synthesized clock, and more

importantly,

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’.

The P1819 is available in different spread deviation, refer

to “Spread Deviation Selection” Table.

The P1819 uses the most efficient and optimized

modulation

implemented in a proprietary all digital method.

Applications

The P1819 is targeted towards EMI management for

memory and LVDS interfaces in mobile graphic chipsets

and high-speed digital applications such as PC peripheral

devices, consumer electronics, and embedded controller

systems.

Loop

Filter

profile

decreases

VDD

VSS

approved

VCO

the

PLL

peak

the

amplitudes

Divider

Output

FCC

P1819

and

ModOUT

its

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p1819dg-08tt Summary of contents

Page 1

... PC peripheral devices, consumer electronics, and embedded controller electromagnetic systems. D_C/NC PD# SRS Modulation Frequency Divider Phase Loop Detector Filter Feedback Divider PulseCore Semiconductor Corporation www.pulsecoresemi.com P1819 decreases the peak amplitudes of profile approved by the FCC and VDD ...

Page 2

March 2007 rev 1.9 Pin Configuration 1 XIN/ CLKIN VSS 2 P1819 A/B/C/D SRS 3 ModOUT 4 Pin Description Pin# Pin Name 1819A/B/C/D 1819E/F/G/H XIN / CLKIN ...

Page 3

March 2007 rev 1.9 Spread Deviation Selection Part Number P1819A P1819B P1819C P1819D P1819E P1819F P1819G P1819H P1819Q Absolute Maximum Ratings Symbol Voltage on any pin with respect to Ground Storage temperature STG T ...

Page 4

March 2007 rev 1.9 DC Electrical Characteristics (Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated) Symbol Parameter V Input Low voltage IL V Input High voltage IH I Input Low current (inputs D_C, PD#, SRS) ...

Page 5

March 2007 rev 1.9 Package Information Symbol θ Note: Controlling dimensions are millimeters SOIC – 0.074 grams unit weight Note Book LCD Panel EMI Reduction IC Notice: ...

Page 6

March 2007 rev 1 Symbol Min A A1 0.002 A2 0.033 B 0.008 c 0.004 D 0.114 E 0.169 0.020 θ Note: Controlling dimensions are millimeters TSSOP – 0.0325 grams unit weight Note Book ...

Page 7

March 2007 rev 1.9 Ordering Codes Part Number Marking P1819XF-08ST P1819XF P1819XF-08SR P1819XF P1819XF-08TT P1819XF P1819XF-08TR P1819XF P1819XG-08ST P1819XG P1819XG-08SR P1819XG P1819XG-08TT P1819XG P1819XG-08TR P1819XG Products are available for industrial temperature range operation. Please contact factory for more information. Note: ...

Page 8

... Fax: 408-879-9018 www.pulsecoresemi.com Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 © Copyright 2007 PulseCore Semiconductor Corporation. All rights reserved. Our logo and name are trademarks or registered trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their respective companies ...

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