AES-Transponder with Ultra Low Power 8-bit Microcontroller and RF transmitter

The Smartrac TAGMICRO-TX is designed for battery operated immobilizer and remote keyless entry applications. The transponder part is protocol and instruction-set compatible with the existing SMARTRAC stand-alone transponder and works even without a battery. Additional commands for μC communication are also implemented. A powerful UHF-transmitter circuit is built in enabling a single chip application.


The μC offers brownout, power-check & glitch detection functions to ensure reliable operation at under voltage conditions. Each of the 16 I/Os are freely programmable. A trimmable RC oscillator of up to 10MHz frequency allows stable operation without need for external resonator. Featuring an 8-bit RISC architecture specially designed for very low power consumption, TAGMICRO-TX executes up to 5 MIPS without compromising battery-lifetime. The battery management feature allows batteries to be recharged by a 125 kHz magnetic field.


Operating temperature

-40°C to +85°C


Small package MLF32; 5 x 5mm


Battery charging function

Tools & Services

- Easy to use DoC functions, full peripheral integration, C-Compiler
- Windows-based software programs with engineering support


  • Ultra low power consumption
  • Reliable operation
  • Outstanding support