USB Audio Decoder ICs - BU94502AMUV

ROHM's USB Audio Decoder ICs integrate a USB 2.0 host, SD memory card controller, AAC decoder, WMA decoder, MP3 decoder, Audio DAC amp, and a system controller all on a single chip, allowing easy playback of music stored in USB flash memory using an audio player. They can be easily added to virtually any audio device (i.e. CD player, mini-component stereo, portable player, car stereo) for greater functionality.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BU94502AMUV-E2 Active VQFN40 2000 2000 Taping Yes
Vcc(Min.)[V] 3.0
Vcc(Max.)[V] 3.6
Digital Audio I/F I2S SPDIF
USB USB2.0 Full Speed
SD MMC SD / miniSD / microSD / SDHC
iPod iPod 5G/iPod nano/iPod classic/iPod touch/iPhone/iPad
Display information Number(Folder, File), Reproduction time, Name(Folder, File), Tag(Artist, Album, Title)
MP3 MPEG 1, 2, 2.5 LAYER 1, 2, 3
WMA WMA9 Standard
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ・The iPod(I²C) mode which can control a USB device using an I²C-bus <=>USB protocol
        conversion function is supported.
    ・iPod(I²C) mode can be chosen in the slave mode (the following, MODE2) which operates
        by command operation from a master microcomputer using the built-in I²C
    ・The audio signal by ISOCHRONOUS IN transfer function is outputted through a sampling
        rate converter automatically.
    ・Audio line-out, the audio serial 3 line (I2S, EIAJ) output, and the digital audio interface
        (SPDIF) output are supported.
    ・It corresponds to automatic enumeration mode.
    ・The iPod(UART) mode which can control a USB device using an UART-bus <=>USB
        protocol conversion function is supported.
Other New/Updated Products Relating to Audio & Video
PART NUMBER Product Name Package Datasheet Distribution Inventory
BU94502CKS2 AAC/WMA/MP3 + SD Memory Card + iPod SQFP-T52   Buy Sample
BU94502CMUV AAC/WMA/MP3 + SD Memory Card + iPod VQFN040V6060   Buy Sample
BU94601KV USB Audio Decoder ICs VQFP64   Buy Sample
BU94603KV USB Audio Decoder ICs VQFP64   Buy Sample
BU94604BKV USB Audio Decoder ICs VQFP64   Buy Sample
BU94605AKV USB Audio Decoder ICs VQFP80   Buy Sample
New Products:
Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.