Low-voltage frequency synthesizer for radio telephones

GENERAL DESCRIPTION The UMA1017M BICMOS device integrates prescalers, a programmable divider, and phase comparator to implement a phase-locked loop. The device is designed to operate from 3 NiCd cells, in pocket phones, with low current and nominal 5 V supplies. The synthesizer operates a

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PHI

PHI

Low-voltage frequency synthesizer for radio telephones

GENERAL DESCRIPTION\nThe UMA1017M BICMOS device integrates prescalers, a programmable divider, and phase comparator to implement a phase-locked loop.\nThe device is designed to operate from 3 NiCd cells, in pocket phones, with low current and nominal 5 V supplies.\nThe synthesizer operates at RF inp • Low current from 3 V supply\n• Fully programmable RF divider\n• 3-line serial interface bus\n• Independent fully programmable reference divider, driven from external crystal oscillator\n• Dual phase detector outputs to allow fast frequency switching\n• Dual power-down modes.;

恩XP

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ZETEX