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I2040CF-08TR データシート(PDF) 1 Page - Alliance Semiconductor Corporation |
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I2040CF-08TR データシート(HTML) 1 Page - Alliance Semiconductor Corporation |
1 / 9 page September 2005 P2040C rev 1.4 Notice: The information in this document is subject to change without notice. Alliance Semiconductor 2575 Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com LCD Panel EMI Reduction IC Features FCC approved method of EMI attenuation. Provides up to 15dB of EMI suppression Generates a low EMI spread spectrum clock of the input frequency 50MHz to 170MHz input frequency range Optimized for 54MHz, 65MHz, 81MHz, 140MHz, and 162MHz pixel clock frequencies Internal loop filter minimizes external components and board space 8 selectable spread ranges, up to ± 2.2% SSON# control pin for spread spectrum enable and disable options 2 selectable modulation rates Low Cycle-to-cycle jitter 3.3V Operating Voltage Ultra low power CMOS design Supports most mobile graphic accelerator and LCD timing controller specifications Available in 8 pin SOIC and TSSOP Packages Product Description The P2040C is a selectable spread spectrum frequency modulator designed specifically for digital flat panel applications. The P2040C reduces electromagnetic interference (EMI) at the clock source which provides system wide reduction of EMI of all clock dependent signals. The P2040C allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations. The P2040C uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all-digital method. The P2040C 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 a 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 P2040C is targeted towards digital flat panel applications for Notebook PCs, Palm-size PCs, Office Automation Equipments and LCD Monitors. Block Diagram CLKIN ModOUT VSS Frequency Divider Feedback Divider Modulation Phase Detector Loop Filter VCO Output Divider PLL VDD SSON# SR0 SR1 MRA |
同様の部品番号 - I2040CF-08TR |
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同様の説明 - I2040CF-08TR |
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