BU9458KV-E2

Overview

The BU9458KV-E2 is a silicon monolithic integrated circuit designed as a USB host AAC+WMA+MP3 decoder LSI. It integrates a USB 2.0 Full Speed host interface, SD card I/F, audio DAC, system controller, and an internal core power supply regulator. The device supports FAT analysis and decodes MP3 (MPEG1/2/2.5 Layer 1-3), WMA9 (non-DRM), and MPEG4 AAC-LC (non-DRM) formats. Key electrical parameters include a supply voltage range of 3.0V to 3.6V for analog and I/O sections, with typical circuit currents of 65mA during USB playback and 35mA during SD card playback. The component operates within a temperature range of -40°C to +85°C and is housed in a VQFP64 package with a 0.5mm pitch.

Feature Summary

• Integrates USB 2.0 Full Speed host interface and SD card interface for direct media playback from external storage devices.
• Includes built-in decoding capabilities for MP3, WMA, and AAC audio formats along with FAT file system analysis.
• Features an integrated audio DAC with digital audio output options via I2S and S/PDIF interfaces.
• Contains a system controller with LED control, key matrix scanning, and sample rate conversion functions.

Applications

• Audio products requiring portable media playback
• USB host-based audio decoders
• SD card based audio players

Procurement Notes

Verify the current lifecycle status before design implementation, as this component may be discontinued or restricted. Confirm that the VQFP64 package dimensions and pinout match your PCB layout requirements. Ensure compliance with RoHS directives if applicable to your manufacturing region. Check for any specific handling precautions regarding moisture sensitivity levels during assembly processes.

Selection Notes

Select this component when a single-chip solution is required for decoding multiple audio formats including MP3, WMA, and AAC. It is suitable for designs needing both USB host and SD card connectivity without external protocol controllers. Consider the 3.3V operating voltage and the integrated regulator when designing the power supply network. Verify that the application does not require DRM support, as this IC explicitly excludes it.

Part Context

This part belongs to ROHM Semiconductor's line of multimedia decoder LSIs. It combines audio processing with peripheral interfaces to reduce system complexity. The VQFP64 package allows for compact board designs while providing sufficient I/O for various control and data lines. It serves as a specialized solution for consumer audio electronics requiring format versatility.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Designers should consult ROHM directly for potential obsolescence management or alternative recommendations if this specific model is no longer suitable for new production.

FAQ

Does the BU9458KV-E2 support DRM-protected content?

No, the device supports WMA9 and MPEG4 AAC-LC standards but explicitly does not support DRM (Digital Rights Management) protected files.

What is the maximum operating temperature for this IC?

The operating temperature range is specified from -40°C to +85°C.

Can this IC function as a standalone player?

Yes, it contains a system controller and supports Stand Alone mode, allowing it to operate independently of an external processor.