P1817A

February 2007 rev 1.1 Low-Power Mobile VGA EMI Reduction IC Features • • • • • • • • • • • • • • • FCC approved method of EMI attenuation. Generates a low EMI spread spectrum clock of the input frequency. Optimized for frequency range from 60 to 175MHz. Internal loop filter minimizes external components and board space. 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. 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 P1817A/B 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. 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’. The P1817 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. SSON/SBM pin for Spread Spectrum On/Off and Standby Mode controls. Available in 8-pin SOIC and TSSOP. Applications The P1817 is targeted towards notebook LCD displays, 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 and other displays using an LVDS interface, PC peripheral devices, and embedded systems. Block Diagram Modulation CLKXIN Frequency Divider Feedback Divider PLL Phase Detector Loop Filter VCO Output Divider REF 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. February 2007 rev 1.1 Pin Configuration P1817A/B CLKIN/XIN VSS SR0 SSON/SBM 1 2 8 7 XOUT VDD REF ModOUT P1817A/B 3 4 6 5 Pin Description Pin# 1 2 3 4 5 6 7 8 Pin Name CLKIN VSS SR0 SSON/SBM ModOUT REF VDD XOUT Type I P I I O O P O 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. Ground Connection. Connect to system ground. Digital logic input used to select Spreading Range. Refer Spread Spectrum Selection Table. This pin has an internal pull-up resistor. Spread Spectrum On/Off and standby mode control. Refer Standby Mode Selection Table. This pin has an internal pull-up resistor. Spread spectrum clock output or Reference output. Refer Standby Mode Selection Table. Reference Output. Connect to +3.3V or 5.0V. Connect to crystal. No connect if externally generated clock signal is used. Low-Power Mobile VGA EMI Reduction IC Notice: The information in this document is subject to change without notice. 2 of 10 February 2007 rev 1.1 Standby Mode Selection CLKIN Disabled Disabled Enabled Enabled P1817A/B SSON/SBM 0 1 0 1 Spread Spectrum N/A N/A Off On ModOUT Disabled Disabled Reference Normal PLL Disabled Free Running Disabled Normal Mode Standby Free Running Buffer out Normal Spread Range Selection, VDD = 5V SR1 0 0 1 1 SR0 0 1 0 1 Spreading Range ± 1.50% ± 2.50% ± 0.50% ± 1.00% Modulation Rate (FIN/80) * 34.72 KHz (FIN/80) * 34.72 KHz (FIN/80) * 34.72 KHz (FIN/80) * 34.72 KHz Low-Power Mobile VGA EMI Reduction IC Notice: The information in this document is subject to change without notice. 3 of 10 February 2007 rev 1.1 Schematic for Notebook VGA Application P1817A/B 60MHz to 175MHz pixel clock input from VGA chip 0.1µF FB VDD 1 P1817 CLKIN NC 8 Pin 8 can be tied either high or low, or it can be left unconnected. Tie SR0 and SR1 high/low according to spread range desired. External resistors are not needed to pull these pins high. 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. 2 VDD SR0 7 3 VSS SR1 6 4 ModOUT SSON 5 Note: To set the P1817 to standby mode, disable the input clock (pin 1 CLKIN) and pull SSON (pin 5) low. Refer Standby Mode Selection Table. Low-Power Mobile VGA EMI Reduction IC Notice: The information in this document is subject to change without notice. 4 of 10 February 2007 rev 1.1 Absolute Maximum Ratings Symbol VDD, VIN TSTG TA TDV P1817A/B Parameter Voltage on any pin with respect to GND Storage temperature Operating temperature Static Discharge Voltage (As per JEDEC STD22- A114-B) Rating -0.5 to +4.6 -65 to +125 0 to 70 2 Unit V °C °C KV Note: These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability. DC Electrical Characteristics Symbol VIL VIH IIL IIH IXOL IXOH VOL VOH ICC IDD VDD tON ZOUT Input low voltage Input high voltage Input low current (pull-up resistors on inputs SR0, SR1 and SSON/SBM) Input high current XOUT output low current @ 0.4V, VDD = 3.3V XOUT output high current @ 2.5V, VDD = 3.3V Output low voltage VDD = 3.3V, IOL = 20mA Output high voltage VDD = 3.3V, IOH = 20mA Dynamic supply current normal mode 3.3V and 10pF loading Static supply current standby mode Operating voltage Power up time (first locked clock cycle after power up) Clock output impedance Parameter Min GND – 0.3 2.0 2.5 8.46 2.7 - Typ 3 3 12 0.6 3.3 0.18 50 Max 0.8 VDD + 0.3 -35 35 0.4 17.78 3.7 - Unit V V µA µA mA mA V V mA mA V mS Ω Low-Power Mobile VGA EMI Reduction IC Notice: The information in this document is subject to change without notice. 5 of 10 February 2007 rev 1.1 AC Electrical Characteristics Symbol fIN fOUT tLH* tHL* tJC tD Input frequency Output frequency Output rise time Measured at 0.8V to 2.0V Output fall time Measured at 0.8V to 2.0V Jitter (cycle to cycle) Output duty cycle P1817A/B Parameter Min 60 60 0.7 0.6 45 Typ 0.9 0.8 50 Max 175 175 1.1 1.0 360 55 Unit MHz MHz nS nS pS % *tLH and tHL are measured into a capacitive load of 15pF Low-Power Mobile VGA EMI Reduction IC Notice: The information in this document is subject to change without notice. 6 of 10 February 2007 rev 1.1 Package Information P1817A/B 8-lead (150-mil) SOIC Package E H D A2 A θ e B A 1 C L D Dimensions Symbol Min A1 A A2 B C D E e H L θ Inches Max 0.010 0.069 0.059 0.020 0.010 0.004 0.053 0.049 0.012 0.007 Millimeters Min Max 0.10 1.35 1.25 0.31 0.18 4.90 BSC 3.91 BSC 1.27 BSC 6.00 BSC 0.41 0° 1.27 8° 0.25 1.75 1.50 0.51 0.25 0.193 BSC 0.154 BSC 0.050 BSC 0.236 BSC 0.016 0° 0.050 8° Low-Power Mobile VGA EMI Reduction IC Notice: The information in this document is subject to change without notice. 7 of 10 February 2007 rev 1.1 P1817A/B 8-lead Thin Shrunk Small Outline Package (4.40-MM Body) H E D A2 A θ e B A1 L C Dimensions Symbol Min A A1 A2 B c D E e H L θ 0.020 0° 0.002 0.033 0.008 0.004 0.114 0.169 0.026 BSC 0.252 BSC 0.028 8° 0.50 0° Inches Max 0.043 0.006 0.037 0.012 0.008 0.122 0.177 0.05 0.85 0.19 0.09 2.90 4.30 Millimeters Min Max 1.10 0.15 0.95 0.30 0.20 3.10 4.50 0.65 BSC 6.40 BSC 0.70 8° Low-Power Mobile VGA EMI Reduction IC Notice: The information in this document is subject to change without notice. 8 of 10 February 2007 rev 1.1 Ordering Codes Part Number P1817A-08ST P1817AF-08SR I1817A-08TT I1817AF-08TR P1817A/B Marking P1817A P1817AF P1817A P1817BF Package Type 8-pin SOIC, tube 8-pin SOIC, tape & reel 8-pin TSSOP, tube 8-pin TSSOP, tape and reel Pb Free No Yes No Yes Temperature Commercial Commercial Industrial Industrial Device Ordering Information P1817AF-08ST OR - SOT23/T/R TT – TSSOP, TUBE TR - TSSOP, T/R VT – TVSOP, TUBE VR – TVSOP, T/R ST – SOIC, TUBE SR - SOIC, T/R QR – QFN, T/R QT - QFN, TUBE BT - BGA, TUBE BR – BGA, T/R Pin Count F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE, LEAD FREE, and RoHS DEVICE NUMBER Flow: P = Commercial Temperature Range (0°C to 70°C) I = Industrial Temperature Range (-45°C to 85°C) Low-Power Mobile VGA EMI Reduction IC Notice: The information in this document is subject to change without notice. 9 of 10 February 2007 rev 1.1 P1817A/B 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: P1817 Document Version: v1.1 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. 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 Mobile VGA EMI Reduction IC Notice: The information in this document is subject to change without notice. 10 of 10