Datasheet USB Audio Decoder LSI Series AAC/WMA/MP3 +SD Memory Card + iPod BU9450xAxxx Series Description Package W(Typ.) x D(Typ.) x H(Max.) BU9450xAxxx series are WAV/AAC/WMA/MP3 decoder LSI which contains USB host, SD card I/F, audio DAC, system controller, regulator for internal CORE power supply. Features USB2.0 Full Speed host I/F function contained. SD card I/F function contained. 2 I C format I/F function contained. 2 Protocol conversion from I C to USB HID or from USB 2 HID to I C. (BU94502AMUV and BU94502AKS2 only) MP3 decode function contained. (Available for MPEG1, 2 and 2.5, Layer 1, 2 and 3) VQFN040V6060 6.00mm x 6.00mm x 1.00mm WMA decode function contained. (Available for WMA9 standard and not available for DRM) AAC decode function contained. (available for MPEG4 AAC-LC and not available for DRM) WAV format file playing function contained. Sample Rate Converter contained. System Controller contained. FAT analysis function contained. Browsing function of File Names, Folder Names on music playing contained. ID3TAG and WMATAG and AACTAG Analysis. Fast forward playing and fast backward playing function contained. Resume function contained. Reading a specified file data is possible from connected memory. LUN is selectable. SQFP-T52 Sound Effect function contained. 12.00mm x 12.00mm x 1.50mm Digital Audio Out function contained. 2 (I S, EIAJ, S/PDIF) Audio DAC contained. Regulator for internal CORE power supply contained. Applications Audio products, etc Line up Part number iPod Package Ordering part number BU94501AMUV VQFN040V6060 Reel of 2000 BU94501AMUV-E2 Not supported BU94501AKS2 SQFP-T52 Tray of 1000 BU94501AKS2 BU94502AMUV VQFN040V6060 Reel of 2000 BU94502AMUV-E2 Supported BU94502AKS2 SQFP-T52 Tray of 1000 BU94502AKS2 Product structureSilicon Monolithic integrated circuit Radiation resistance design is not arranged w ww.rohm.com TSZ02201-0V2V0E600070-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/69 TSZ2211114001 2017.3.21 Rev.004 BU9450xAxxx series Basic circuit application diagram -part1 This LSI builds in regulator for internal CORE power supply (1.5V). DVDD M terminal of 10PIN connect to bypass condenser and dont connect to power supply (3.3V) Please confirm the optimal oscillation circuit parameters applicable to your systems or products with the oscillator manufacturer in advance. VQFN040V6060 package exposes its frame of the backside of package. Note that this part is assumed to use after providing heat dissipation treatment to improve heat dissipation efficiency. Try to occupy as wide as possible with heat dissipation pattern not only on the board surface but also the backside. Figure 1. an example of connection circuit applicationBU9450xAMUV w ww.rohm.com TSZ02201-0V2V0E600070-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/69 TSZ2211115001 2017.3.21 Rev.004