Radio series


The KT0933 is KT Micro’s 3rd generation of proprietary fully integrated AM/FM receiver chip that upgrades the performance, improve the user experience and ease integration and manufacturing efforts. The new features include improved flatness of sensitivity on the whole band, independent status indicator, improved EMI/EMC and higher FM stereo separation.
Thanks to the patented tuning technology, the receiver maintains good signal reception even with short antennas. The chip consumes merely 29mA current and can be powered by 2 AAA batteries. Another useful feature is that the volume and channel information can be preserved in standby mode without external memories. KT0933 supports a wide range of reference clocks from 30KHz to 40MHz, hence can share system clocks with a varieties of MCUs further reducing the system BOM cost. The KT0933 have different user interface schemes like other parts in the KT093x family,
With high audio performance, fully integrated features and low BOM cost, KT0933 is ideal for various applications and products that require flexible programmability for rich features.
Main Features
Worldwide full band FM/AM support
      FM: 32MHz-110MHz
      AM: 500KHz-1750KHz
Fully integrated frequency synthesizer with no external components
High Sensitivity
      1.6uVEMF for FM
      16uVEMF for AM
High Fidelity
      SNR (FM/AM): 60dB/55dB(without weighting filter)
      THD: 0.3%
Low Supply Current
      29mA (operating)
      <45uA (standby)
Advanced features
      Automatic antenna tuning
      Adjustable AM channel filters (1.2/2.4/3.6/4.8/6KHz)
      Enhanced FM Automatic Frequency Control (AFC) Capability (up to 200KHz)
      Flexible Automatic Gain Control (AGC)
      Embedded AM/FM SNR meter
      Embedded ST indicator
      Integrated stereo headphone driver
      2-wire control interface for MCU
      Advanced Softmute
      Flexible stereo Blend
Low supply voltage
       2.1V to 3.6V, can be supplied by 2 AAA batteries
Support both 32.768KHz and 38KHz crystal
True Continuous Reference Clock supported
      From 30KHz      to 40MHz with 3V voltage tolerance
Compatible with EN55020
Small form factor SSOP16L package
RoHS Compliant
Main applications
Desktop and portable radio, mini/portable audio systems, clock radio, campus radio, PMP docking station, car audio system, toy and gift.