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I2041AG-08TR 데이터시트(PDF) 1 Page - PulseCore Semiconductor |
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I2041AG-08TR 데이터시트(HTML) 1 Page - PulseCore Semiconductor |
1 / 8 page November 2006 P2041A rev 0.2 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 Versatile EMI Reduction IC Features FCC approved method of EMI attenuation Provides up to 20dB of EMI suppression Generates a low EMI spread spectrum clock of the input frequency Optimized for 25MHz to 60MHz 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 Low Cycle-to-cycle jitter 3.3V or 5.0V operating voltage Low power CMOS design Available in 8 pin SOIC and TSSOP Packages Product Description The P2041A is a selectable spread spectrum frequency modulator designed specifically for PC peripheral and embedded controller markets. The P2041A reduces electromagnetic interference (EMI) at the clock source which provides system wide reduction of EMI of all clock dependent signals. The P2041A allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations. The P2041A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all-digital method. The P2041A 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 result 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 P2041A is targeted towards the embedded controller market and PC peripheral markets including scanners, MFP’s, printers, PDA, IA , and GPS devices. Block Diagram XIN ModOUT VSS Frequency Divider Feedback Divider Modulation Phase Detector Loop Filter VCO Output Divider PLL VDD SSON SR0 SR1 Crystal Oscillator XOUT |
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