P2010A November 2003 rev F Low Frequency EMI Reduction IC Features FCC approved method of EMI attenuation Provides up to 20 dB of EMI suppression Generates a low EMI spread spectrum clock of the input frequency Optimized for 10 MHz to 35MHz input frequency range Internal loop filter minimizes external components and board space 4 selectable spread ranges SSON control pin for spread spectrum enable and disable options ® Characterizes to work with EMI-Lator , EMC simulation program. Low cycle-to-cycle jitter Wide operating range (3V to 5V) 16 mA output drives TTL or CMOS compatible outputs Low power CMOS design Available in 8 pin SOIC and TSSOP Product Description The P2010 is a selectable spread spectrum frequency modulator designed specifically for PC peripheral and embedded controller markets. The P2010 reduces electromagnetic interference (EMI) at the clock source which provides system wide reduction of EMI of all clock dependent signals. The P2010 allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations. The P2010 uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all-digital method. The P2010 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”. Applications The P2010 is targeted towards the embedded controller market and PC peripheral markets including scanners, facsimile, MFP’s, printers, PDA, IA, and GPS devices. Block Diagram Alliance Semiconductor 2575, Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com Notice: The information in this document is subject to change without notice. P2010A November 2003 rev F Pin Configuration Pin Description Pin# Pin Name Type Description 1 XIN/CLK I Connect to crystal or externally generated clock signal. 2 XOUT I 3 FS0 I 4 VSS P 5 SSON I 6 ModOUT O 7 SR0 I 8 VDD P Connect to crystal. No connect if externally generated clock signal is used. Digital logic input used to select Input Frequency Range (see Table 1). This pin has an internal pull-up resistor. Ground Connection. Connect to system ground. Digital logic input used to enable Spread Spectrum function (Active Low). Spread Spectrum function enable when low. This pin has an internal pulllow resistor. Spread Spectrum Clock Output. Digital logic input used to select Spreading Range (see Table 1). This pin has an internal pull-up resistor. Connect to +3.3V or +5.0V Table 1 - Spread Range Selection FS0 SR0 Spreading Range Input Frequency Modulation rate 1 0 +/- 1.50% 10 MHz to 20 MHz (Fin/10)*20.83 KHz 1 1 +/- 2.50% 10 MHz to 20 MHz (Fin/10)*20.83 KHz 0 0 +/- 1.25% 20 MHz to 35 MHz (Fin/10)*20.83 KHz 0 1 +/- 2.00% 20 MHz to 35 MHz (Fin/10)*20.83 KHz Low Frequency EMI Reduction IC Notice: The information in this document is subject to change without notice. 2 of 9 P2010A November 2003 rev F 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 CLKIN, Pin 1). Example of a typical printer or scanner application that operates on a clock frequency of 16 MHz: A spreading selection of FS0=1 and SR0=1 provides a percentage deviation of +/-2.50%* (see Table 1) of Fcen. This results in the frequency on ModOUT being swept from 16.40 MHz to 15.60 MHz at a modulation rate of 33.33 KHz (see Table 1). This particular example (see Figure below) given here is a common EMI reduction method for scanner, printer, or embedded applications and has already been adopted by most of the leading manufacturers. NOTE: Spreading range selection varies from different system manufacturers and their designs. P2010 Application Schematic for Flat-Bed Scanner Low Frequency EMI Reduction IC Notice: The information in this document is subject to change without notice. 3 of 9 P2010A November 2003 rev F EMC Software Simulation By using Alliance Semiconductor’s proprietary EMC simulation software – EMI-lator®, radiated system level EMI analysis can be made easier to allow a quantitative assessment on Alliance’s EMI reduction products. The simulation engine of this EMC software has already been characterized to correlate with the electrical characteristics of Alliance EMI reduction IC’s. The figure below is an example of the simulation result. Please visit our web site at www.alsc.comfor information on how to obtain a free copy and demonstration of EMI-lator®. Simulation Result from EMI-lator® Low Frequency EMI Reduction IC Notice: The information in this document is subject to change without notice. 4 of 9 P2010A November 2003 rev F Absolute Maximum Ratings Symbol VDD, VIN Parameter Voltage on any pin with respect to GND Rating Unit -0.5 to + 7.0 V TSTG Storage temperature -65 to +125 °C TA Operating temperature 0 to +70 °C DC Electrical Characteristics Symbol VIL VIH IIL IIH VOL VOH IDD ICC VDD tON ZOUT Parameter Min Typ Max Unit Input Low Voltage GND – - 0.8 V Input High Voltage 2.0 - VDD + 0.3 V Input Low Current (pull-up resistor on inputs SR0, 1) - - -35 µA Input High Current (pull-down resistor on input SSON) - - 35 µA Output Low Voltage (VDD=3.3V, IOL = 20 mA) - - 0.4 V Output High Voltage (VDD=3.3V, IOH = 20 mA) 2.5 - - V Static Supply Current - 0.6 - mA Dynamic Supply Current (3.3V and 15pF loading) 4 6 8 mA 2.7 3.3 5.5 V Operating Voltage Power Up Time (First locked clock cycle after power up) Clock Output Impedance 0.18 ms 50 Ω AC Electrical Characteristics Symbol Min 10 Typ 20 Max 30 Unit MHz 0.7 0.9 1.1 ns 0.6 0.8 1.0 ns tJC Output rise time (Measured at 0.8V to 2.0V) Output fall time (Measured at 0.8V to 2.0V) Jitter (cycle to cycle) - - 360 ps tD Output duty cycle 45 50 55 % fIN tLH* tHL* Parameter Input Frequency when *tLH and tHL are measured into a capacitive load of 15pF Low Frequency EMI Reduction IC Notice: The information in this document is subject to change without notice. 5 of 9 P2010A November 2003 rev F Package Information Mechanical Package Outline 8-Pin SOIC Symbol Dimensions in inches Dimensions in millimeters Min Nor Max Min Nor Max A 0.057 0.064 0.071 1.45 1.63 1.80 A1 0.004 0.007 0.010 0.10 0.18 0.25 A2 0.053 0.061 0.069 1.35 1.55 1.75 B 0.012 0.016 0.020 0.31 0.41 0.51 C 0.004 0.006 0.01 0.10 0.15 0.25 D 0.186 0.194 0.202 4.72 4.92 5.12 E 0.148 0.156 0.164 3.75 3.95 4.15 e 0.050 BSC 1.27 BSC H 0.224 0.236 0.248 5.70 6.00 6.30 L 0.012 0.020 0.028 0.30 0.50 0.70 a 0° 5° 8° 0° 5° 8° Note: Controlling dimensions are millimeters Low Frequency EMI Reduction IC Notice: The information in this document is subject to change without notice. 6 of 9 P2010A November 2003 rev F Mechanical Package Outline 8-Pin TSSOP Dimensions in inches Symbol Min Nor A Max Dimensions in millimeters Min Nor 0.047 A1 0.002 A2 0.031 B Max 1.10 0.006 0.05 0.041 0.80 0.007 0.012 0.19 0.30 C 0.004 0.008 0.09 0.20 D 0.114 0.118 0.122 2.90 3.00 3.10 E 0.169 0.173 0.177 4.30 4.40 4.50 e 0.039 0.026 BSC 0.15 1.00 1.05 0.65 BSC H 0.244 0.252 0.260 6.20 6.40 6.60 L 0.018 0.024 0.030 0.45 0.60 0.75 a 0° 5° 8° 0° 5° 8° Note: Controlling dimensions are millimeters Low Frequency EMI Reduction IC Notice: The information in this document is subject to change without notice. 7 of 9 P2010A November 2003 rev F Ordering Codes Part Number Marking Package Type P2010A-08ST P2010A 8 PIN SOIC, TUBE P2010A-08SR P2010A 8 PIN SOIC, TAPE & REEL P2010A-08TT P2010A 8 PIN TSSOP, TUBE P2010A-08TR P2010A 8 PIN TSSOP, TAPE & REEL Qty per reel Temperature (°C) 0 TO 70 2,500 0 TO 70 0 TO 70 2,500 0 TO 70 Device Ordering Information X 2 0 1 0 A X - 0 8 X X Package: ST – SOIC, TUBE SR - SOIC, T/R TT – TSSOP, TUBE TR - TSSOP, T/R Pin Count F = Pb FREE DEVICE NUMBER Flow: P = Commercial Temperature Range (0°C to 70°C) I = Industrial Temperature Range (-25°C to 85°C) A = Automotive Temperature Range (-40°C to 125°C) Licensed under US patent Nos 5,488,627 and 5,631,920. Preliminary datasheet. Specification subject to change without notice. Low Frequency EMI Reduction IC Notice: The information in this document is subject to change without notice. 8 of 9 P2010A November 2003 rev F Alliance Semiconductor Corporation 2595, Augustine Drive, Santa Clara, CA 95054 Tel# 408-855-4900 Fax: 408-855-4999 www.alsc.com Copyright © Alliance Semiconductor All Rights Reserved Part Number: P2010A Document Version: F © Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Alliance reserves the right to make changes to this document and its products at any time without notice. Alliance assumes no responsibility for any errors that may appear in this document. The data contained herein represents Alliance's best data and/or estimates at the time of issuance. Alliance 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. Alliance 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 Alliance 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 Alliance's Terms and Conditions of Sale (which are available from Alliance). All sales of Alliance products are made exclusively according to Alliance's Terms and Conditions of Sale. The purchase of products from Alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of Alliance or third parties. Alliance 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 Alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use. Low Frequency EMI Reduction IC Notice: The information in this document is subject to change without notice. 9 of 9