BU94604BKV is an AAC+WMA+MP3 decoder IC from ROHM. It contains USB host and SD card I/F, audio DAC, system controller, regulator for internal CORE power supply.
The BU94604BKV is an AAC+WMA+MP3 decoder IC that includes a USB 2.0 full‑speed host, SD‑card interface, audio DAC, system controller, regulator, LED and key‑matrix controllers, and supports stand‑alone or slave operation. It offers functions such as FAT analysis, ID3/WMATAG/AACTAG parsing, sample‑rate conversion, and digital audio outputs (I²S, S/PDIF).
Key specifications include a 3.0‑3.6 V analog/I‑O supply, a VQFP64 0.5 mm pitch package, storage temperature range –55 °C to 125 °C, operating temperature –40 °C to 85 °C, and a maximum power dissipation of 750 mW. Electrical characteristics list USB and SD current consumption, voltage levels, and audio DAC performance (THD 0.02 %).
| Supply voltage (Analog, I/O) | 3.0~3.6 V |
|---|---|
| Storage temperature range | -55~125 °C |
| Operating temperature range | -40~85 °C |
| Power dissipation | 750 mW |
| USB1 current (VDD1 USB1) | 65~80 mA |
| Audio DAC THD | 0.02 % |
| Package | VQFP64, 0.5 mm pitch |
It decodes AAC, WMA (non‑DRM), and MP3 (MPEG‑1, 2, 2.5, layers 1‑3).
The device is supplied in a VQFP64 package with a 0.5 mm pin pitch.
The IC operates from –40 °C to 85 °C.
The absolute maximum analog/I‑O supply voltage is up to 4.5 V.