ON Semiconductor – LC823450: Advanced audio-processing SoC saves space and power


LC823450: encodes/decodes MP3 files in hardware

ON Semiconductor has released its latest high-resolution audio-processing System-on-Chip (SoC), which enables designers to reduce the size and prolong the
battery run-time of mobile devices, wearable accessories and voice recorders.

The new LC823450 is based on a highly efficient ARM® Cortex®-M3 processor core and ON Semiconductor’s 32-bit/192kHz audio-processing engine. The audio engine implements MP3 encoding and decoding and wireless-audio support in hardware, which both boosts performance and reduces power usage.

In addition, a large selection of royalty- and licence-free DSP code samples are available, which help to accelerate software design and keep development costs to a minimum. These samples include advanced functions such as noise cancellation, and SLive (Low-frequency Intelligence Virtual Excitation) for enhanced playback of low frequencies.

With 1.6Mbytes of on-chip SRAM, the new LC823450 has ample memory for audio processing and application tasks without needing a companion memory chip. Designers can also take advantage of a number of integrated audio peripherals, such as an ADC, a phase-locked loop and a Class D amplifier. In addition, industry-standard interfaces such as SPI, I2C, SDCard and UART enable product designers to provide for connectivity to other system functions. The LC823450 is available in two package styles: a 5.5mm x 5.3mm chip-scale package, and a TQFP measuring 14mm x 14mm.


  • I2S interface
  • DSP code for FLAC codec
  • Hi-Speed USB2.0 device/host interface
  • Oscillation controller to dynamically change clock frequency


  • Digital voice recorders
  • Wireless headsets
  • Other portable audio devices
  • High-resolution audio players