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UMA1020 - Low-voltage dual frequency synthesizer for radio telephones

General Description

The UMA1020AM BICMOS device integrates prescalers, programmable dividers, and phase comparators to implement two phase-locked loops.

The device is designed to operate from 3 NiCd cells, in pocket phones, with low current and nominal 5 V supplies.

Key Features

  • Low current from 3 V supply.
  • Fully programmable RF divider.
  • 3-line serial interface bus.
  • Second synthesizer to control first IF or offset loop frequency.
  • Independent fully programmable reference dividers for each loop, driven from external crystal oscillator.
  • Dual phase detector outputs to allow fast frequency switching.
  • Dual power-down modes.

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Datasheet Details

Part number UMA1020
Manufacturer NXP Semiconductors
File Size 159.84 KB
Description Low-voltage dual frequency synthesizer for radio telephones
Datasheet download datasheet UMA1020 Datasheet

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Full PDF Text Transcription for UMA1020 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for UMA1020. For precise diagrams, tables, and layout, please refer to the original PDF.

INTEGRATED CIRCUITS DATA SHEET UMA1020AM Low-voltage dual frequency synthesizer for radio telephones Product specification Supersedes data of November 1994 File under Inte...

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Product specification Supersedes data of November 1994 File under Integrated Circuits, IC03 1995 Jul 06 Philips Semiconductors Product specification Low-voltage dual frequency synthesizer for radio telephones FEATURES • Low current from 3 V supply • Fully programmable RF divider • 3-line serial interface bus • Second synthesizer to control first IF or offset loop frequency • Independent fully programmable reference dividers for each loop, driven from external crystal oscillator • Dual phase detector outputs to allow fast frequency switching • Dual power-down modes. APPLICATIONS • 1 to 1.7 GHz mobile telephones • Portable ba