P1708C [PULSECORE]

Low Power Notebook LCD Panel EMI Reduction IC; 低功耗笔记本电脑LCD面板的EMI降低IC


型号：	P1708C
厂家：	PulseCore Semiconductor
描述：	Low Power Notebook LCD Panel EMI Reduction IC 低功耗笔记本电脑LCD面板的EMI降低IC 电脑 CD
文件：	总8页 (文件大小：168K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

January 2008

rev 1.3

P1708C

Low Power Notebook LCD Panel EMI Reduction IC

Features

down stream clock and data dependent signals. The

P1708C 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 50 to 110MHz.

Internal loop filter minimizes external components and

board space.

The P1708C 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’.

•

Four selectable spread ranges.

Low inherent cycle-to-cycle jitter.

3.3V operating voltage range.

TTL or CMOS compatible inputs and outputs.

Ultra-low power CMOS design.

•

8.46 mA @3.3V, 54MHz

9.79 mA @3.3V, 65MHz

12.06 mA @3.3V, 81MHz

16.51 mA @3.3V, 108MHz

The P1708C uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented in a proprietary all digital method.

•

Supports notebook VGA and other LCD timing

controller applications.

Pinout compatible to ICS MK1708 and Cypress

CY25560.

SSON/SBM pin for Spread Spectrum On/Off and

Standby Mode controls.

Applications

Available in 8-pin SOIC and TSSOP.

The P1708C is targeted towards notebook LCD displays,

and other displays using an LVDS interface, PC peripheral

devices, and embedded systems.

Product Description

The P1708C is a versatile spread spectrum frequency

modulator designed specifically for input clock frequencies.

The P1708C reduces electromagnetic interference (EMI) at

the clock source, allowing system wide reduction of EMI of

VDD

SR0

SSON

SR1

Block Diagram

PLL

Modulation

CLKIN

Frequency

Divider

Output

Divider

Phase

Detector

Loop

Filter

VCO

Feedback

Divider

ModOUT

VSS

PulseCore Semiconductor Corporation

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

www.pulsecoresemi.com

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

January 2008

rev 1.3

P1708C

Pin Configuration

CLKIN

VDD

SR0

P1708C

VSS

SR1

ModOUT

SSON/SBM

Pin Description

Pin#

Pin Name

Type

Description

Connect to externally generated clock signal. To put the part into standby mode,

disable the input clock signal to this pin and pull SSON/SBM (pin 5) low. Refer

Standby Mode Selection Table.

CLKIN

VDD

VSS

Connect to +3.3V.

Ground Connection. Connect to system ground.

Spread spectrum clock output.

ModOUT

Spread Spectrum On/Off and standby mode control. Refer Standby Mode

Selection Table. This pin has an internal pull-up resistor.

SSON/SBM

SR1

Digital logic input used to select Spreading Range. Refer Spread Spectrum

Selection Table. This pin has an internal pull-up resistor.

Digital logic input used to select Spreading Range. Refer Spread Spectrum

Selection Table. This pin has an internal pull-up resistor.

SR0

No connect.

Standby Mode Selection

Spread

Spectrum

CLKIN

SSON/SBM

ModOUT

PLL

Mode

Disabled

Enabled

N/A

Disabled

Reference

Normal

Disabled

Free Running

Disabled

Standby

Free Running

Buffer out

Normal

N/A

Off

Normal

Low Power Notebook LCD Panel EMI Reduction IC

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

January 2008

rev 1.3

P1708C

Spread Range Selection

SR1

SR0

Spreading Range

± 1.00%

Modulation Rate

(F_IN/40) * 62.49 KHz

± 2.00%

± 0.25%

± 0.75%

Schematic for Notebook VGA Application

P1708C

50MHz to 110MHz pixel clock input

from VGA chip

Pin 8 can be tied either high or low,

or it can be left unconnected.

CLKIN

0.1µF

VDD

VSS

Tie SR0 and SR1 high/low

SR0

SR1

according to spread range desired.

External resistors are not needed to

pull these pins high.

VDD

Pin 5 SSON should be left unconnected to turn on

spread spectrum. Pull this pin low to turn spread

spectrum OFF and enable stand-by mode.

ModOUT

SSON

50MHz – 110MHz Pixel Clock

Input from VGA Chip

Note: To set the P1708C to standby mode, disable the input clock (pin 1 CLKIN) and pull SSON (pin 5) low. Refer Standby Mode Selection

Table.

Absolute Maximum Ratings

Symbol

VDD, V_IN

T_STG

T_A

Parameter

Voltage on any pin with respect to Ground

Storage temperature

Rating

-0.5 to +7.0

-65 to +125

0 to +70

260

Unit

°C

Operating temperature

°C

T_s

Max. Soldering Temperature (10 sec)

Junction Temperature

°C

T_J

150

°C

T_DV

Static Discharge Voltage (As per JEDEC STD22- A114-B)

Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect

device reliability.

Low Power Notebook LCD Panel EMI Reduction IC

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

January 2008

rev 1.3

P1708C

DC Electrical Characteristics

Symbol

Parameter

Min

GND – 0.3

2.0

Typ

Max

Unit

V_IL

V_IH

I_IL

Input low voltage

Input high voltage

0.8

V_DD+ 0.3

-35

Input low current (pull-up resistors on inputs SR0, SR1 and

SSON/SBM)

µA

I_IH

Input high current

µA

I_XOL

I_XOH

V_OL

V_OH

I_CC

X_OUToutput low current @ 0.4V, V_DD= 3.3V

X_OUToutput high current @ 2.5V, V_DD= 3.3V

Output low voltage V_DD= 3.3V, I_OL= 20mA

Output high voltage V_DD= 3.3V, I_OH= 20mA

0.4

2.5

Dynamic supply current normal mode

3.3V and 10pF loading

17.53

f_IN-max

7.90

9.79

I_DD

V_DD

t_ON

Static supply current standby mode

Operating voltage

0.6

3.3

2.7

3.7

Power up time (first locked clock cycle after power up)

Clock output impedance

0.18

Ω

Z_OUT

AC Electrical Characteristics

Symbol

Parameter

Min

Typ

Max

Unit

f_IN

Input frequency

Output frequency

110

MHz

f_OUT

Output rise time

Measured at 0.8V to 2.0V

t_LH*

t_HL*

0.7

0.6

0.9

0.8

1.1

1.0

Output fall time

Measured at 0.8V to 2.0V

t_JC

t_D

Jitter (cycle to cycle)

Output duty cycle

360

*t_LHand t_HLare measured into a capacitive load of 15pF

Low Power Notebook LCD Panel EMI Reduction IC

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

January 2008

rev 1.3

P1708C

Package Information

8-Pin SOIC Package

Dimensions

Symbol

Inches

Millimeters

Min

Max

0.010

0.069

0.059

0.020

0.010

Min

0.10

1.35

1.25

0.31

0.18

Max

0.25

1.75

1.50

0.51

0.25

0.004

0.053

0.049

0.012

0.007

0.193 BSC

0.154 BSC

0.050 BSC

0.236 BSC

4.90 BSC

3.91 BSC

1.27 BSC

6.00 BSC

0.016

0°

0.050

8°

0.41

0°

1.27

8°

Note: Controlling dimensions are millimeters.

SOIC: 0.074 grams unit weight.

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

January 2008

rev 1.3

P1708C

8-Pin TSSOP

Dimensions

Symbol

Inches

Millimeters

Min

Max

Min

Max

0.043

0.006

0.037

0.012

0.008

0.122

0.177

1.10

0.002

0.033

0.008

0.004

0.114

0.169

0.05

0.85

0.19

0.09

2.90

4.30

0.15

0.95

0.30

0.20

3.10

4.50

0.026 BSC

0.252 BSC

0.65 BSC

6.40 BSC

0.020

0°

0.028

8°

0.50

0°

0.70

8°

Low Power Notebook LCD Panel EMI Reduction IC

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

January 2008

rev 1.3

P1708C

Ordering Codes

Part number

P1708CF-08ST

P1708CF-08SR

P1708CF-08TT

P1708CF-08TR

P1708CG-08ST

P1708CG-08SR

P1708CG-08TT

P1708CG-08TR

Marking

P1708CF

P1708CG

Package Type

8-Pin SOIC, Tube, Pb Free

Temperature

Commercial

8-Pin SOIC, Tape and Reel, Pb Free

8-Pin TSSOP, Tube, Pb Free

8-Pin TSSOP, Tape and Reel, Pb Free

8-Pin SOIC, Tube, Green

8-Pin SOIC, Tape and Reel, Green

8-Pin TSSOP, Tube, Green

8-Pin TSSOP, Tape and Reel, Green

Device Ordering Information

P 1 7 0 8 C F - 0 8 S T

SR - SOIC, T/R

TT – TSSOP, TUBE

TR - TSSOP, T/R

ST – SOIC, TUBE

PIN COUNT

F = LEAD FREE AND RoHS COMPLIANT PART

G = GREEN PACKAGE, LEAD FREE, and RoHS

Deviation (%) and Spread option Identifier

DEVICE NUMBER

P = Commercial Temperature Range (0°C to 70°C)

I = Industrial Temperature Range (-40°C to 85°C)

Licensed under U.S Patent Nos 5,488,627 and 5,631,921

Low Power Notebook LCD Panel EMI Reduction IC

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

January 2008

rev 1.3

P1708C

PulseCore Semiconductor Corporation

1715 S. Bascom Ave Suite 200

Campbell, CA 95008

Tel: 408-879-9077

Fax: 408-879-9018

Preliminary Information

Part Number: P1708C

Document Version: 1.3

www.pulsecoresemi.com

Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003

Many PulseCore Semiconductor products are protected by issued patents or by applications for patent

registered trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their

respective companies. PulseCore reserves the right to make changes to this document and its products at any time without

notice. PulseCore assumes no responsibility for any errors that may appear in this document. The data contained herein

represents PulseCore’s best data and/or estimates at the time of issuance. PulseCore reserves the right to change or correct

this data at any time, without notice. If the product described herein is under development, significant changes to these

specifications are possible. The information in this product data sheet is intended to be general descriptive information for

potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or

customer. PulseCore does not assume any responsibility or liability arising out of the application or use of any product

described herein, and disclaims any express or implied warranties related to the sale and/or use of PulseCore products

including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual

property rights, except as express agreed to in PulseCore’s Terms and Conditions of Sale (which are available from

PulseCore). All sales of PulseCore products are made exclusively according to PulseCore’s Terms and Conditions of Sale.

The purchase of products from PulseCore does not convey a license under any patent rights, copyrights; mask works rights,

trademarks, or any other intellectual property rights of PulseCore or third parties. PulseCore does not authorize its products

for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result

in significant injury to the user, and the inclusion of PulseCore products in such life-supporting systems implies that the

manufacturer assumes all risk of such use and agrees to indemnify PulseCore against all claims arising from such use.

Low Power Notebook LCD Panel EMI Reduction IC

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

P1708C [PULSECORE]

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