The Homer IC

The Homer IC is a VHF-UHF transmitter, capable of sending ASK or PSK modulated signals, with frequency correction of the RF carrier and channel tuning. It is primarily designed for implementation in Cospas-Sarsat beacons. Its programmable frequency synthesizers and ASK modulator allow the ASIC to be reconfigured to meet other beacon requirements. The ASIC is configured and controlled by an external microcontroller via an SPI bus interface and via two pins for PSK and ASK modulations.


  • COSPAS-SARSAT compatible transmitter (406, 121 MHz)
  • ASK (121 MHz) and PSK (406 MHz) modulation
  • COSPAS-SARSAT channel selection
  • RF carrier temperature drift compensation
  • Optimized for battery operation (2.5 – 5.%V supply voltage range)
  • Low consumption in sleep mode (5:A)
  • Real time clock (RTC)
  • Wake-up by RTC or external interrupts
  • Fully controllable by digital SPI interface
  • Low number of external components
  • QFN48 (6*6) package

HOMER will bring you significant advantages for your BEACON product:

  • Cost reduction
  • Smaller formfactor
  • Reduction of assembly and test cost (production cost)
  • Improvement of production yield
  • Reduction of power consumption
  • Reduced procurement and administration cost
  • No manual tuning