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ASM3P2187AG-08TR Datasheet(PDF) 1 Page - PulseCore Semiconductor |
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ASM3P2187AG-08TR Datasheet(HTML) 1 Page - PulseCore Semiconductor |
1 / 9 page May 2008 ASM3P2187A/B 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 Spread Spectrum Clock Generator for Mobile Applications Features • Generates a 4X EMI optimized clock signal at the Output. • Input frequency : 12.5MHz to 20MHz • Output frequency : 50MHz to 80MHz • SSON/PDB option • Selectable Centre Spread : ± 0.5%, ± 1.0% • Low power CMOS design • Supply Voltage : 3.3V ± 0.3V • Industrial Temperature range • 8-pin TSSOP Package • Drop-in replacement for MB88155-412 Device Product Description The ASM3P2187A/B is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2187A/B reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of all clock dependent signals. The ASM3P2187A/B allows significant system cost savings by reducing the number of circuit board layers ferrite beads, shielding that are traditionally required to pass EMI regulations. ASM3P2187A device has an option of Spread ON/OFF and ASM3P2187B device has Powerdown option Application The ASM3P2187A/B is targeted towards mobile phones, mobile audio players and PDAs. Block Diagram VSS CLKIN/XIN SEL REFOUT Frequency Divider Feedback Divider Modulation Phase Detector Loop Filter VCO Output Divider PLL VDD SSON/PDB XOUT Crystal Oscillator ModOUT |
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