OM5156M

INTEGRATED CIRCUITS DATA SHEET OM5156M Low-voltage dual frequency synthesizer for radio telephones Product specification Supersedes data of 1995 Jun 27 File under Integrated Circuits, IC03 1995 Nov 24 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 2 GHz mobile telephones Portable battery-powered radio equipment. GENERAL DESCRIPTION The OM5156M 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, QUICK REFERENCE DATA SYMBOL VCC, VDD ICC + IDD PARAMETER supply voltage principal synthesizer supply current principal and auxiliary synthesizer supply current ICCPD, IDDPD current in power-down mode per supply fVCO fAI fXTAL fPPC fAPC Tamb principal input frequency auxiliary input frequency crystal reference input frequency principal phase comparator frequency auxiliary phase comparator frequency operating ambient temperature CONDITIONS VCC ≥ VDD auxiliary synthesizer in power-down mode principal and auxiliary synthe...