BU94605AKV is WAV/AAC/WMA/MP3 decoder IC which contains program download function from external serial Flash ROM and contains USB host, SD card I/F, CD-ROM I/F, audio DAC, system controller, regulator for internal CORE power supply.
The BU94605AKV is a USB audio decoder IC that integrates a USB 2.0 full‑speed host, SD‑card and CD‑ROM interfaces, an audio DAC, system controller and internal regulators. It supports decoding of WAV, AAC, WMA and MP3 audio formats and includes functions such as FAT file‑system analysis, ID3/WMATAG handling, and various playback controls.
The document lists absolute maximum ratings, electrical characteristics, a block diagram, detailed pin descriptions, and I/O signal specifications. Key parameters such as supply voltage ranges, operating temperature, power dissipation, and audio performance metrics are provided for designers.
| Supply voltage (Analog, I/O) – absolute max | -0.3 ~ 4.5 V |
|---|---|
| Operating temperature range | -40 ~ 85 °C |
| Power dissipation | 900 mW |
| Circuit current (USB) typical | 60 ~ 90 mA |
| Audio DAC THD | 0.005 % |
| Audio DAC dynamic range | 90 dB |
The IC includes a USB 2.0 Full‑Speed host interface.
RESETX is the system reset input terminal.
The absolute maximum rating is –0.3 V to 4.5 V.