USB Audio Decoder ICs - BU94502AKS2

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
Constitution Materials List
BU94502AKS2-E2 Active SQFP-T52 1000 1000 Taping inquiry 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.
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Thermal Resistance