P1708C January 2008 rev 1.3 Low Power Notebook LCD Panel EMI Reduction IC Features down stream clock and data dependent signals. The • FCC approved method of EMI attenuation. P1708C allows significant system cost savings by reducing • Generates a low EMI spread spectrum clock of the the number of circuit board layers ferrite beads, shielding input frequency. and other passive components that are traditionally • Optimized for frequency range from 50 to 110MHz. required to pass EMI regulations. • Internal loop filter minimizes external components and board space. The P1708C modulates the output of a single PLL in order • Four selectable spread ranges. to “spread” the bandwidth of a synthesized clock, and more • Low inherent cycle-to-cycle jitter. importantly, • 3.3V operating voltage range. harmonics. This results in significantly lower system EMI • TTL or CMOS compatible inputs and outputs. compared to the typical narrow band signal produced by • Ultra-low power CMOS design. oscillators and most frequency generators. Lowering EMI • 8.46 mA @3.3V, 54MHz by increasing a signal’s bandwidth is called ‘spread • 9.79 mA @3.3V, 65MHz spectrum clock generation’. • 12.06 mA @3.3V, 81MHz • 16.51 mA @3.3V, 108MHz • • decreases the peak amplitudes of its The P1708C uses the most efficient and optimized Supports notebook VGA and other LCD timing modulation controller applications. implemented in a proprietary all digital method. profile approved by the FCC and is Pinout compatible to ICS MK1708 and Cypress CY25560. • SSON/SBM pin for Spread Spectrum On/Off and Applications Standby Mode controls. • Available in 8-pin SOIC and TSSOP. The P1708C is targeted towards notebook LCD displays, and other displays using an LVDS interface, PC peripheral Product Description The P1708C is a versatile spread spectrum frequency devices, and embedded systems. modulator designed specifically for input clock frequencies. The P1708C reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of SR0 SR1 SSON Block Diagram VDD PLL Modulation CLKIN Frequency Divider Feedback Divider Phase Detector Loop Filter VCO Output 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. P1708C January 2008 rev 1.3 Pin Configuration CLKIN 1 VDD 2 8 NC 7 SR0 P1708C VSS 3 6 SR1 5 ModOUT 4 SSON/SBM Pin Description Pin# Pin Name Type Description 1 CLKIN I 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. 2 VDD P Connect to +3.3V. 3 VSS P Ground Connection. Connect to system ground. 4 ModOUT O Spread spectrum clock output. 5 SSON/SBM I Spread Spectrum On/Off and standby mode control. Refer Standby Mode Selection Table. This pin has an internal pull-up resistor. 6 SR1 I Digital logic input used to select Spreading Range. Refer Spread Spectrum Selection Table. This pin has an internal pull-up resistor. 7 SR0 I Digital logic input used to select Spreading Range. Refer Spread Spectrum Selection Table. This pin has an internal pull-up resistor. 8 NC - No connect. Standby Mode Selection CLKIN SSON/SBM Spread Spectrum ModOUT PLL Mode Disabled 0 N/A Disabled Disabled Standby Disabled 1 N/A Disabled Free Running Free Running Enabled 0 Off Reference Disabled Buffer out Enabled 1 On Normal Normal Normal Low Power Notebook LCD Panel EMI Reduction IC Notice: The information in this document is subject to change without notice. 2 of 8 P1708C January 2008 rev 1.3 Spread Range Selection SR1 SR0 Spreading Range Modulation Rate 0 0 ± 1.00% (FIN/40) * 62.49 KHz 0 1 ± 2.00% (FIN/40) * 62.49 KHz 1 0 ± 0.25% (FIN/40) * 62.49 KHz 1 1 ± 0.75% (FIN/40) * 62.49 KHz Schematic for Notebook VGA Application 50MHz to 110MHz pixel clock input from VGA chip 1 P1708C NC CLKIN 8 Pin 8 can be tied either high or low, or it can be left unconnected. 2 VDD SR0 7 3 VSS SR1 6 Tie SR0 and SR1 high/low according to spread range desired. External resistors are not needed to pull these pins high. 4 ModOUT SSON 5 0.1µF FB 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. 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, VIN TSTG Parameter Rating Unit Voltage on any pin with respect to Ground -0.5 to +7.0 V Storage temperature -65 to +125 °C 0 to +70 °C TA Operating temperature Ts Max. Soldering Temperature (10 sec) 260 °C TJ Junction Temperature 150 °C TDV Static Discharge Voltage (As per JEDEC STD22- A114-B) 2 KV 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 Notice: The information in this document is subject to change without notice. 3 of 8 P1708C January 2008 rev 1.3 DC Electrical Characteristics Symbol Parameter Min Typ Max Unit VIL Input low voltage GND – 0.3 0.8 V VIH Input high voltage 2.0 VDD + 0.3 V IIL Input low current (pull-up resistors on inputs SR0, SR1 and SSON/SBM) -35 µA IIH Input high current 35 µA IXOL XOUT output low current @ 0.4V, VDD = 3.3V 3 mA IXOH XOUT output high current @ 2.5V, VDD = 3.3V 3 mA VOL Output low voltage VDD = 3.3V, IOL = 20mA VOH Output high voltage VDD = 3.3V, IOH = 20mA 2.5 ICC Dynamic supply current normal mode 3.3V and 10pF loading 7.90 IDD Static supply current standby mode VDD Operating voltage tON Power up time (first locked clock cycle after power up) ZOUT 0.4 V V 9.79 17.53 fIN -max mA 0.6 2.7 mA 3.3 Clock output impedance 3.7 V 0.18 mS 50 Ω AC Electrical Characteristics Symbol Max Unit Input frequency 50 110 MHz fOUT Output frequency 50 110 MHz tLH* Output rise time Measured at 0.8V to 2.0V 0.7 0.9 1.1 ns tHL* Output fall time Measured at 0.8V to 2.0V 0.6 0.8 1.0 ns tJC Jitter (cycle to cycle) 360 ps tD Output duty cycle 55 % fIN Parameter Min 45 Typ 50 *tLH and tHL are measured into a capacitive load of 15pF Low Power Notebook LCD Panel EMI Reduction IC Notice: The information in this document is subject to change without notice. 4 of 8 P1708C January 2008 rev 1.3 Package Information 8-Pin SOIC Package H E D A2 A C A1 D θ e L B Dimensions Symbol Inches Min Max Millimeters Min Max A1 0.004 0.010 0.10 0.25 A 0.053 0.069 1.35 1.75 A2 0.049 0.059 1.25 1.50 B 0.012 0.020 0.31 0.51 C 0.007 0.010 0.18 0.25 D 0.193 BSC 4.90 BSC E 0.154 BSC 3.91 BSC e 0.050 BSC 1.27 BSC H 0.236 BSC 6.00 BSC L 0.016 0.050 0.41 1.27 θ 0° 8° 0° 8° Note: Controlling dimensions are millimeters. SOIC: 0.074 grams unit weight. Low Power Notebook LCD Panel EMI Reduction IC Notice: The information in this document is subject to change without notice. 5 of 8 P1708C January 2008 rev 1.3 8-Pin TSSOP H E D A2 A C θ e A1 L B Dimensions Symbol Inches Min Millimeters Max A Min Max 0.043 1.10 A1 0.002 0.006 0.05 0.15 A2 0.033 0.037 0.85 0.95 B 0.008 0.012 0.19 0.30 c 0.004 0.008 0.09 0.20 D 0.114 0.122 2.90 3.10 E 0.169 0.177 4.30 4.50 e 0.026 BSC 0.65 BSC H 0.252 BSC 6.40 BSC L 0.020 0.028 0.50 0.70 θ 0° 8° 0° 8° Low Power Notebook LCD Panel EMI Reduction IC Notice: The information in this document is subject to change without notice. 6 of 8 P1708C January 2008 rev 1.3 Ordering Codes Part number Marking Package Type Temperature P1708CF-08ST P1708CF 8-Pin SOIC, Tube, Pb Free Commercial P1708CF-08SR P1708CF 8-Pin SOIC, Tape and Reel, Pb Free Commercial P1708CF-08TT P1708CF 8-Pin TSSOP, Tube, Pb Free Commercial P1708CF-08TR P1708CF 8-Pin TSSOP, Tape and Reel, Pb Free Commercial P1708CG-08ST P1708CG 8-Pin SOIC, Tube, Green Commercial P1708CG-08SR P1708CG 8-Pin SOIC, Tape and Reel, Green Commercial P1708CG-08TT P1708CG 8-Pin TSSOP, Tube, Green Commercial P1708CG-08TR P1708CG 8-Pin TSSOP, Tape and Reel, Green Commercial 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 Notice: The information in this document is subject to change without notice. 7 of 8 P1708C January 2008 rev 1.3 PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Copyright © PulseCore Semiconductor All Rights Reserved Preliminary Information Part Number: P1708C Document Version: 1.3 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 © Copyright 2006 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. 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 Notice: The information in this document is subject to change without notice. 8 of 8