P2180 Peak Reducing EMI Solution Features • FCC approved method of EMI attenuation. • Provides up to 15dB EMI reduction. • Generates a 1X low EMI spread spectrum clock from the input frequency. • Optimized for frequency range: o P2180: 20MHz to 40MHz • Internal loop filter minimizes external components and board space. • Selectable spread options: Down Spread. • Low inherent cycle-to-cycle jitter. • 3.3V operating voltage. • CMOS/TTL compatible inputs and outputs. • Low-power CMOS design. • Supports notebook VGA and other LCD timing controller applications. • Drop-in replacement to Cypress W180/1. • Available in 8-pin SOIC package. of percentage deviations. Selections Table. Refer Spread Deviation The P2180 reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P2180 allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations. The P2180 modulates the output of a single PLL in order to “spread” the bandwidth of a synthesized clock, thereby decreasing 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 clock generators. Lowering EMI by increasing a signal’s bandwidth is called spread spectrum clock generation. The P2180 uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all-digital method. Product Description The P2180 is a versatile spread spectrum frequency modulator designed specifically for a range of clock frequencies from 20MHz to 40MHz.The P2180 can generate an EMI reduced clock form an OSC or a system generated clock. The P2180 offers various combinations ©2010 SCILLC. All rights reserved. NOVEMBER 2010 – Rev. 2.1 Applications The P2180 is targeted towards EMI management for memory and LVDS interfaces in mobile graphic chipsets and high-speed digital applications such as PC peripheral devices, consumer electronics, and embedded controller systems. Publication Order Number: P2180/D P2180 Block Diagram VDD SRS PLL Modulation XIN XOUT Crystal Oscillator Frequency Divider Phase Detector Feedback Divider Loop Filter VCO Output Divider ModOUT VSS Pin Diagram XIN 1 NC 2 Pin Description Pin# Pin Name 8 P2180X 7 NC VSS 3 6 VDD SRS 4 5 ModOUT Type I NC Description 1 XIN Connect to externally generated clock signal or crystal. 2 NC 3 VSS P 4 SRS I 5 ModOUT O Ground to entire chip. Spread Range Select. Digital logic input used to select frequency deviation Refer Spread Deviation Selections Table. This pin has an internal pull-up resistor. Spread spectrum low EMI output. 6 VDD P Connect to +3.3V. 7 NC No connect. 8 NC No connect. No connect. Rev. 2 | Page 2 of 6 | www.onsemi.com P2180 Input Frequency and Modulation Rate Part Number Input Frequency Range (MHz) Output Frequency Range (MHz) Modulation Rate P2180 20 to 40 20 to 40 Input frequency / 768 Spread Deviation Selections Part Number SRS P2180 A Absolute Maximum Ratings Symbol VDD, VIN TSTG Spread Deviation 0 -1.25% (Down) 1 -1.75% (Down) Parameter Rating Unit Voltage on any pin with respect to Ground -0.5 to +4.6 V Storage temperature -65 to +125 °C Ts Max. Soldering Temperature (10 sec) 260 °C TJ TDV Junction Temperature Static Discharge Voltage (As per JEDEC STD22- A114-B) 150 2 °C 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. Operating Conditions Parameter VDD Description Min Max Unit Supply Voltage 3.0 3.6 V -40 TA Operating Temperature (Ambient Temperature) +85 °C CL Load Capacitance 15 pF CIN Input Capacitance 7 pF Rev. 2 | Page 3 of 6 | www.onsemi.com P2180 DC Electrical Characteristics Unless otherwise noted, VDD = 3.3V and TA =25°C. Symbol Parameter VIL Input low voltage VIH Input high voltage IIL Input low current (input SRS) IIH Input high current IXOL XOUT output low current (@ 0.4V, VDD = 3.3V) IXOH XOUT output high current (@ 2.5V, VDD = 3.3V) VOL Output low voltage (VDD = 3.3V, IOL = 20mA) VOH Output high voltage (VDD = 3.3V, IOH = 20mA) Dynamic supply current normal mode (3.3V and 10pF loading) Static supply current standby mode ICC IDD VDD tON ZOUT Typ -60.0 2.00 Max Unit 0.8 V VDD + 0.3 V -20.0 µA 1.00 µA 12.00 mA 12.00 mA 0.4 2.8 8.6 fIN min Operating voltage Power up time (first locked clock cycle after power up) Clock output impedance AC Electrical Characteristics Symbol Parameter fIN Min GND – 0.3 V V 27.0 fIN max mA 4.5 mA 3.3 V mS Ω Min Typ Max Unit Input frequency 20 40 MHz fOUT Output frequency 20 40 MHz tLH Output rise time (measured at 0.8V to 2.0V) tHL 1 1 0.69 Output fall time (measured at 2.0V to 0.8V) tJC Jitter (cycle-to-cycle) tD Output duty cycle ns 0.66 -200 45 Note: 1. tLH and tHL are measured into a capacitive load of 15pF. Rev. 2 | Page 4 of 6 | www.onsemi.com 50 ns 200 ps 55 % P2180 Package Information 8-Pin SOIC Package H E D A2 A θ C D e A1 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 θ 0° 8° 0.41 1.27 0° 8° Note: Controlling dimensions are millimeters. SOIC: 0.074 grams unit weight. Rev. 2 | Page 5 of 6 | www.onsemi.com P2180 Ordering Information Part number P2180AF-08SR Marking ACF Package Type 8-Pin SOIC, Tape and Reel, Pb Free Temperature 0°C to +70°C A “microdot” placed at the end of last row of marking or just below the last row toward the center of package indicates Pb-free. are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes ON Semiconductor and without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. U.S Patent Pending; Timing-Safe and Active Bead are trademarks of PulseCore Semiconductor, a wholly owned subsidiary of ON Semiconductor. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: [email protected] N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your localSales Representative