BU94502AMUV-E2

Overview

The BU94502AMUV-E2 is a silicon monolithic integrated circuit designed as a USB Audio Decoder LSI. It integrates a USB 2.0 Full Speed host interface, SD card I/F, audio DAC, system controller, and an internal regulator for the core power supply. The device supports WAV, AAC, WMA, and MP3 decoding formats. It operates with a supply voltage range of 3.0 V to 3.6 V and features a 1-bit audio DAC with digital soft mute capabilities. The component utilizes a VQFN040V6060 package measuring 6.00 mm x 6.00 mm x 1.00 mm.

Feature Summary

• Integrates USB 2.0 Full Speed host interface supporting USB mass storage class and iPod automatic enumeration.
• Includes built-in decoders for MP3 (MPEG 1/2/2.5 Layer 1-3), WMA (Windows Media Audio 9 standard), AAC (MPEG4 AAC-LC), and WAV formats.
• Features protocol conversion between I2C and USB HID interfaces for communication with master microcomputers.
• Contains a sample rate converter that converts supported sample rates to 44.1 kHz using polyphase calculation.

Applications

• Audio products requiring USB host connectivity
• Portable media players utilizing SD memory cards
• Digital audio systems integrating iPod compatibility

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm the specific ordering suffix matches the required package type and reel quantity. Ensure compliance with RoHS directives and check for any licensing requirements related to Apple Inc. protocols if iPod functionality is utilized in the final design.

Selection Notes

Select this model when iPod support and USB host functionality are required alongside SD card access. Compare against the BU94501 series if iPod features are unnecessary. Ensure the application board provides adequate heat dissipation patterns for the exposed pad in the VQFN package. Verify that the master microcontroller supports the necessary I2C communication speeds.

Part Context

This component belongs to the BU9450xAxxx series of USB Audio Decoder LSIs manufactured by ROHM Semiconductor. The series includes variants like the BU94501AMUV which lacks iPod support. The AMUV designation indicates the VQFN package style, distinguishing it from the AKS2 SQFP variant within the same functional family.

Replacement Considerations

BU94501AMUV-E2 serves as a substitute if iPod support is not required. BU94502AKS2-E2 offers identical functionality but in an SQFP-T52M package. Verify pinout compatibility and thermal management requirements when switching between package types.