UMA1021AM中文资料Low-voltage frequency synthesizer for radio telephones数据手册恩XP规格书

描述 Description

GENERAL DESCRIPTION
The UMA1021AM 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
• Hard and soft power-down control.APPLICATIONS
• 900 MHz and 2 GHz mobile telephones
• Portable battery-powered radio equipment.

特性 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
• Hard and soft power-down control.