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MK5811AS Datasheet(PDF) 1 Page - Integrated Circuit Systems |
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MK5811AS Datasheet(HTML) 1 Page - Integrated Circuit Systems |
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1 / 7 page  MK5811A MDS 5811A A 1 Revision 091205 Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com Low EMI Clock Generator Description The MK5811A device generates a low EMI output clock from a clock or crystal input. The device is designed to dither a high emissions clock to lower EMI in consumer applications. Using ICS’ proprietary mix of analog and digital Phase Locked Loop (PLL) technology, the device spreads the frequency spectrum of the output and reduces the frequency amplitude peaks by several dB. The MK5811A offers both centered and down spread from a high-speed clock input. For different multiplier configurations, use the MK5812 (2x) or MK5814 (4x). ICS offers many other clocks for computers and computer peripherals. Consult ICS when you need to remove crystals and oscillators from your board. Features • Packaged in 8-pin SOIC • Available in Pb (lead) free package • Provides a spread spectrum output clock • Supports flat panel controllers • Accepts a clock or crystal input (provides same frequency dithered output) • Input frequency range of 4 to 32 MHz • Output frequency range of 4 to 32 MHz • 1X frequency multiplication • Center and down spread • Peak reduction by 8 dB to 16 dB typical on 3rd through 19th odd harmonics • Low EMI feature can be disabled • Includes power down • Operating voltage of 3.3 V • Advanced, low-power CMOS process Block Diagram PLL Clock Synthesis and Spread Spectrum Circuitry S1:0 Spread Direction FRSEL SSCLK 2 GND VDD Clock Buffer/ Crystal Ocsillator X1/CLK X2 The crystal requires external capacitors for accurate tuning of the clock |
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