UMA1021 Datasheet (NXP) - Low-voltage frequency synthesizer for radio telephones

UMA1021, Low-voltage frequency synthesizer for radio telephones

The UMA1021AM BICMOS device integrates a prescaler, programmable dividers, and a phase comparator to implement a phase-locked loop.

QUICK REFERENCE DATA SYMBOL VDD1, VDD2 VCC Itot Itot(pd) fRF fxtal fph(comp) Tamb PARAMETER digital supply voltage total supply current (IDD + ICC) total supply current

UMA1021 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