P2041A November 2006 rev 0.2 Versatile EMI Reduction IC Features which provides system wide reduction of EMI of all clock dependent signals. The P2041A allows significant system FCC approved method of EMI attenuation Provides up to 20dB of EMI suppression Generates a low EMI spread spectrum clock of the cost savings by reducing the number of circuit board layers input frequency and shielding that are traditionally required to pass EMI regulations. Optimized for 25MHz to 60MHz input frequency The P2041A uses the most efficient and optimized range modulation Internal loop filter minimizes external components implemented in a proprietary all-digital method. profile approved by the FCC and is and board space 4 selectable spread ranges The P2041A modulates the output of a single PLL in order SSON control pin for spread spectrum enable and to “spread” the bandwidth of a synthesized clock and, more disable options importantly, Low Cycle-to-cycle jitter harmonics. This result in significantly lower system EMI 3.3V or 5.0V operating voltage compared to the typical narrow band signal produced by Low power CMOS design oscillators and most frequency generators. Lowering EMI Available in 8 pin SOIC and TSSOP Packages by increasing a signal’s bandwidth is called “spread decreases the peak amplitudes of its spectrum clock generation”. Product Description The P2041A is a selectable spread spectrum frequency modulator designed specifically for PC peripheral and embedded controller markets. The P2041A reduces electromagnetic interference (EMI) at the clock source Applications The P2041A is targeted towards the embedded controller market and PC peripheral markets including scanners, MFP’s, printers, PDA, IA , and GPS devices. Block Diagram SR0 SR1 SSON VDD PLL Modulation XIN XOUT Crystal Oscillator 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. P2041A November 2006 rev 0.2 Pin Configuration XIN/CLK 11 88 VDD XOUT 22 77 SR0 SR1 33 66 ModOUT VSS 44 55 SSON P2040C P2041A Pin Description Pin# Pin Name Type Description 1 XIN/CLK I 2 XOUT I Connect to crystal. No connect if externally generated clock signal is used. Connect to crystal or externally generated clock signal. 3 SR1 I Digital logic input used to select Spreading Range (see Table 1). This pin has an internal pull-up resistor. 4 VSS P Ground Connection. Connect to system ground. 5 SSON I Digital logic input used to enable Spread Spectrum function (Active Low). Spread Spectrum function enable when low. This pin has an internal pull-low resistor. 6 ModOUT O Spread Spectrum Clock Output. 7 SR0 I Digital logic input used to select Spreading Range (see Table 1). This pin has an internal pull-up resistor. 8 VDD P Connect to +3.3V or +5.0V Spread Range Selection SR1 SR0 Spreading Range Modulation rate 0 0 +/- 1.50% (Fin/40)*34.72 KHz 0 1 +/- 2.50% (Fin/40)*34.72 KHz 1 0 +/- 0.50% (Fin/40)*34.72 KHz 1 1 +/- 1.00% (Fin/40)*34.72 KHz Versatile EMI Reduction IC Notice: The information in this document is subject to change without notice. 2 of 8 P2041A November 2006 rev 0.2 Spread spectrum selection Table 1 illustrates the possible spread spectrum options. The optimal setting should minimize system EMI to the fullest without affecting system performance. The spreading is described as a percentage deviation of the center frequency ( Note: the center frequency is the frequency of the external reference input on XIN/CLK, Pin 1). Example of a typical printer or scanner application that operates on a clock frequency of 40MHz: A spreading selection of SR1=1 and SR0=1 provides a percentage deviation of +/-1.00%* (see Table 1) of Center Frequency. This results in the frequency on ModOUT being swept from 40.40MHz to 39.60MHz at a modulation rate of (40/40)*34.72 = 34.72KHz (see Table 1). This particular example (see Figure below) given here is a common EMI reduction method for scanners and has already been implemented by most of the leading manufacturers. NOTE: Spreading range selection varies from different system manufacturers and their designs. The spreading range of P2041A can be set to +/-2.5% when working with certain scanner model. P2041A Application Schematic for Flat-Bed Scanner VDD 40MHz 1 XIN/CLK VDD 8 2 XOUT SR0 7 3 SR1 ModOUT 6 4 VSS SSON 5 P2041A 0.1µF Modulated 40MHz signal with ± 1.00% Deviation and modulation rate of 34.72KHz. This signal is connected back to the clock crystal Input pin of the system ASIC. NOTE: The above schematic indicates The exact setting of this example: Default setting (no connection on pin 3, 7 and 5) Absolute Maximum Ratings Symbol Parameter Rating Unit VDD, VIN Voltage on any pin with respect to Ground -0.5 to +7.0 V Storage temperature -65 to +125 °C TA Operating temperature -40 to +85 °C Ts Max. Soldering Temperature (10 sec) 260 °C TJ Junction Temperature 150 °C 2 KV TSTG TDV 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. Versatile EMI Reduction IC Notice: The information in this document is subject to change without notice. 3 of 8 P2041A November 2006 rev 0.2 DC Electrical Characteristics (Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated) Symbol Parameter Min Typ Max VSS –0.3 - 0.8 - - 1.5 ( For 3.3V Supply Voltage) 2.0 - VDD + 0.3 ( For 5V Supply Voltage) 3.5 - - - - -35 - - -100 - - 35 - - 100 IXOL Input Low Current ( For 3.3V Supply Voltage) (pull-up resistor on inputs ( For 5V Supply Voltage) SR0, SR1) Input High Current ( For 3.3V Supply Voltage) (pull-down resistor on input ( For 5V Supply Voltage) SSON ) XOUT Output Low Current (VXOL @ 0.4V, VDD = 3.3V) - 3 - IXOH XOUT Output High Current ( VXOH@ 2.5V, VDD = 3.3V) - 3 - VOL Output Low Voltage (VDD=3.3V, IOL = 20 mA) - - 0.4 (VDD=5V, IOL = 20 mA) - - 0.5 VOH Output High Voltage (VDD=3.3V, IOH = 20 mA) 2.5 - - (VDD=5V, IOH = 20 mA) 4.5 - - IDD Static Supply Current - 1.0 - ICC Dynamic Supply Current 3.3V and 15pF loading - - 22 5V and 15pF loading - - 35 2.7 3.3 5.5 V Min Typ Max Unit 25 40 60 MHz 0.7 1.0 1.3 nS 0.6 0.8 1.0 nS - 360 - pS 45 50 55 % VIL Input low Voltage VIH Input low Voltage IIL IIH VDD ( For 3.3V Supply Voltage) ( For 5V Supply Voltage) Operating Voltage Unit V V µA µA mA mA V V mA mA AC Electrical Characteristics Symbol fIN Parameter Input Frequency tJC Output rise time ( Measured at 0.8V to 2.0V ) Output fall time ( Measured at 2.0 to 0.8V ) Jitter (Cycle to cycle) tD Output duty cycle tLH* tHL* *tLH and tHL are measured into a capacitive load of 15pF Versatile EMI Reduction IC Notice: The information in this document is subject to change without notice. 4 of 8 P2041A November 2006 rev 0.2 Package Information 8-lead (150-mil) 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° Versatile EMI Reduction IC Notice: The information in this document is subject to change without notice. 5 of 8 P2041A November 2006 rev 0.2 8-lead TSSOP (4.40-MM Body) 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° Versatile EMI Reduction IC Notice: The information in this document is subject to change without notice. 6 of 8 P2041A November 2006 rev 0.2 Ordering Information Part number Marking Package Configuration Temperature Range P2041AF-08ST P2041AF 8-Pin SOIC, Tube, Pb Free Commercial P2041AF-08SR P2041AF 8-Pin SOIC, Tape and Reel, Pb Free Commercial P2041AF-08TT P2041AF 8-Pin TSSOP, Tube, Pb Free Commercial P2041AF-08TR P2041AF 8-Pin TSSOP, Tape and Reel, Pb Free Commercial P2041AG-08ST P2041AG 8-Pin SOIC, Tube, Green Commercial P2041AG-08SR P2041AG 8-Pin SOIC, Tape and Reel, Green Commercial P2041AG-08TT P2041AG 8-Pin TSSOP, Tube, Green Commercial P2041AG-08TR P2041AG 8-Pin TSSOP, Tape and Reel, Green Commercial I2041AF-08ST I2041AF 8-Pin SOIC, Tube, Pb Free Industrial I2041AF-08SR I2041AF 8-Pin SOIC, Tape and Reel, Pb Free Industrial I2041AF-08TT I2041AF 8-Pin TSSOP, Tube, Pb Free Industrial I2041AF-08TR I2041AF 8-Pin TSSOP, Tape and Reel, Pb Free Industrial I2041AG-08ST I2041AG 8-Pin SOIC, Tube, Green Industrial I2041AG-08SR I2041AG 8-Pin SOIC, Tape and Reel, Green Industrial I2041AG-08TT I2041AG 8-Pin TSSOP, Tube, Green Industrial I2041AG-08TR I2041AG 8-Pin TSSOP, Tape and Reel, Green Industrial Device Ordering Information P 2 0 4 1 A 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 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 US patent Nos 5,488,627 and 5,631,920. Versatile EMI Reduction IC Notice: The information in this document is subject to change without notice. 7 of 8 P2041A November 2006 rev 0.2 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 Part Number: P2041A Document Version: 0.2 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 © 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. Versatile EMI Reduction IC Notice: The information in this document is subject to change without notice. 8 of 8