UMA1021中文資料飛利浦?jǐn)?shù)據(jù)手冊PDF規(guī)格書

GENERAL DESCRIPTION

The UMA1021M BICMOS device integrates a prescaler, programmable dividers, and a 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 3 V supplies.

FEATURES

? Low phase noise

? Low current from 3 V supply

? Fully programmable main divider

? 3-line serial interface bus

? Independent fully programmable reference divider, driven from external crystal oscillator

? Dual charge pump outputs

? Hard and soft power-down control.

APPLICATIONS

? 900 MHz and 2 GHz mobile telephones

? Portable battery-powered radio equipment.