THERMALSHUTDOWNmodefordeviceprotectionathightemperatures·Batteryvoltagesensor·IntegratedRFTran***itterforI***Band315/434MHz·Selectableoutputpower5or8dBm（transformedinto50Ohmload）·ConfigurableRFtran***issiondataratesupto10kbit/sManchestercoded（20kchips/s）·ASK/FSKmodulationcapability·Frequencydeviationupto50kHzinFSKmode·FullyintegratedVCOａndPLLSynthesizer·Onchipcrystaloscillatortuning·LFReceiverwithveryhighinputsensitivity·LFReceiverdatarate3.9kbit/s·8051instructionsetcompatiblemicrocontroller（cycle-optimized）·6kByteFLASHmemory（forapplicationcode）·12kByteROM（forROMlibraryfuncti***）·256BytesRAM)