VS1011 - MP3 Decoder Circuit

Block diagram


The VS1011 is VLSI Solution's basic MP3 decoder chip. It has a reliable and high-quality MP3 and WAV decoding engine combined with a stereo D/A converter and earphone amplifier. Although intended as slave processor, the VS1011 also has a standalone mode that can be used to create a simple standalone MP3 player. Available in two difference packages, this IC is truly customer-proven: over ten million units have been delivered!


  • Decodes MP3 (MPEG 1.0 & 2.0 audio layer III (CBR, VBR, ABR));
    MP1 & MP2 (MPEG 1.0 & 2.0 audio layers I & II) optional;
  • Full 320 kbit/s MP3 with 12.0 MHz external clock
  • Streaming support for MP1/2/3 and WAV
  • Bass and treble controls
  • Operates with single 12 - 13 MHz or 24 - 26 MHz external clock
  • Internal clock doubler
  • Low-power operation
  • High-quality stereo DAC with no phase error between channels
  • Stereo earphone driver capable of driving a 30­ ohm load
  • Separate 2.5...3.6 V operating voltages for analog and digital
  • Serial control and data interfaces
  • Can be used as a slave co-processor
  • 5.5 KiB On-chip RAM for user code / data
  • SPI flash boot for special applications
  • New functions may be added with software and 4 GPIO pins

Product variations and order codes

Device ID (order code) Package
VS1011E-L LQFP-48
VS1011E-S SOIC-28


LQFP48 7x7x1.4mm
SOIC28 10 x 17.5 x 2.5 mm