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P2005SG-08TR Datasheet(PDF) 1 Page - PulseCore Semiconductor |
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P2005SG-08TR Datasheet(HTML) 1 Page - PulseCore Semiconductor |
1 / 8 page November 2006 P2005A/S rev 1.3 Notice: The information in this document is subject to change without notice. PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018 www.pulsecoresemi.com Low Frequency EMI Reduction IC Features • FCC approved method of EMI attenuation. • Provides up to 15dB of EMI suppression. • Generates a 1X or ½X low EMI spread spectrum clock of the input frequency. • Input frequency range: 8MHz to 32MHz. • Internal loop filter minimizes external components and board space. • Frequency deviation: • P2005A: ± 1% to ± 3% • P2005S: ± 0.6% to ± 1.8% • SSON# control pin for spread spectrum enable and disable options. • Low cycle-to-cycle jitter. • 3.3V or 5V operating voltage range. • Ultra-low power CMOS design. • Available in 8-pin SOIC and TSSOP. Product Description The P2005A/S is a versatile spread spectrum frequency modulator designed specifically for input clock frequencies from 8MHz to 32MHz. Refer Output Frequency Selection Table. The P2005A/S can generate an EMI reduced clock from crystal, ceramic resonator, or system clock. The P2005A/S offers various percentage BlockDiagram deviations ranging form ±0.6% to ±3.0%. Refer Frequency Deviation Selections Table. The P2005A/S reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P2005A/S 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 P2005A/S uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method. The P2005A/S 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 P2005A/S is targeted towards EMI management for high-speed digital applications such as PC peripheral devices, consumer electronics and embedded controller systems. VSS XIN Frequency Divider Feedback Divider Modulation Phase Detector Loop Filter VCO Output Divider MODOUT PLL VDD SSON# DIV2 SR0 Crystal Oscillator XOUT |
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