BU94604KV-E2

Overview

The BU94604KV-E2 is a silicon monolithic integrated circuit designed as an AAC/WMA/MP3 decoder LSI. It integrates a USB host interface, SD card I/F, audio DAC, system controller, and internal regulator. The device supports USB 2.0 Full Speed (12 Mbps) communication and includes protocol conversion between I2C and USB HID. It features FAT analysis for file management and decodes MP3, WMA, and AAC formats. The unit operates on a 3.0 V to 3.6 V supply voltage with a typical operating current of 65 mA during USB playback. It utilizes a VQFP-64 package with a 0.5 mm pitch.

Feature Summary

• Integrates USB host interface and SD card interface for direct media access
• Supports decoding of MP3, WMA, and AAC audio formats
• Includes built-in sample rate converter and digital soft mute function
• Provides flexible control via standalone mode or I2C slave interface

Applications

• Audio products requiring portable media playback
• USB memory-based music players
• SD card-based audio devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging configuration. Confirm that the component meets all required environmental standards for the intended deployment environment before finalizing procurement plans.

Selection Notes

Select this model when both USB host connectivity and SD card support are required within a single chip solution. Ensure the application design accommodates the 3.3V power supply requirements and the specific pin configurations associated with the VQFP-64 package format.

Part Context

This component belongs to the BU9460 series of audio decoder LSIs from ROHM Semiconductor. It shares architectural similarities with the BU94601KV and BU94603KV but offers enhanced codec support including AAC and WMA alongside MP3. The series is designed for compact audio applications requiring integrated file system handling.

Replacement Considerations

BU94604BKV-E2

FAQ

Does the BU94604KV-E2 support iPod playback?

Yes, the datasheet indicates that the BU94604BKV variant supports iPod functionality, subject to appropriate licensing requirements.

What is the maximum supported bit rate for WMA files?

The device supports WMA bit rates ranging from 5 to 384 kbps, excluding free format.

How is the audio output configured?

The device provides analog line outputs via LDACO and RDACO pins, or digital audio outputs via I2S and SPDIF interfaces, selectable via hardware pins or commands.