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P2008AG-08ST Datasheet(PDF) 1 Page - PulseCore Semiconductor |
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P2008AG-08ST Datasheet(HTML) 1 Page - PulseCore Semiconductor |
1 / 8 page November 2006 P2008A rev 1.4 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 General Purpose EMI Reduction IC Features • FCC approved method of EMI attenuation. • Provides up to 15dB of EMI suppression. • Generates a 1X or ½ X low EMI spread spectrum clock of the input frequency. • Input frequency range: 4MHz to 32MHz. • Internal loop filter minimizes external components and board space. • Spreading ranges from ±0.8% to ±3.2%. • SSON# control pin for spread spectrum enable and disable options. • Low Cycle-to-Cycle jitter. • 3.3V Operating Voltage. • Ultra-low power CMOS design. • Available in 8-pin SOIC and TSSOP Packages. Product Description The P2008A is a versatile spread spectrum frequency modulator designed specifically for digital camera and other digital video and imaging applications. The P2008A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P2008A 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 P2008A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method. The P2008A 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 P2008A is targeted towards cable, xDSL, fax modem, set-top box, USB controller, DSC, and other embedded systems. Block Diagram VSS VDD XIN/CLKIN Frequenc y Feedbac k Modulation Phase Detector Loop Filter VCO Output Divider ModOUT PLL SSON# DIV2 SR0 Crystal Oscillator XOUT |
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