BU94604BKV-E2

Overview

The BU94604BKV-E2 is a silicon monolithic integrated circuit designed as an AAC/WMA/MP3 decoder LSI. It integrates a USB 2.0 Full Speed host interface, SD card I/F, audio DAC, system controller, and internal regulator. The device supports MPEG1, 2, and 2.5 Layer 1, 2, and 3 MP3 decoding, WMA9 standard (non-DRM), and MPEG4 AAC-LC (non-DRM). It features protocol conversion between I2C and USB HID, FAT analysis for up to 8 folder layers, and a sample rate converter. Operating conditions include a supply voltage of 3.0V to 3.6V and an operating temperature range of -40°C to +85°C. The component is housed in a VQFP64 package with a 0.5mm pitch.

Feature Summary

• Integrates USB 2.0 Full Speed host interface with I2C to USB HID protocol conversion capability.
• Supports playback of MP3, WMA9, and AAC-LC formats with ID3TAG, WMATAG, and AACTAG analysis.
• Includes built-in audio DAC, digital audio output (I2S, SPDIF), and sample rate converter.
• Features standalone operation via key matrix or slave mode control through I2C interface.

Applications

• Audio products requiring USB memory and SD card playback
• Portable media players supporting iPod devices
• Standalone audio decoders with external microcontroller integration

Procurement Notes

Verify the specific ordering suffix and availability status before procurement. Confirm that the required Apple license for iPod compatibility is secured if utilizing this feature. Ensure the design accounts for the component's moisture sensitivity level and handling requirements during assembly.

Selection Notes

Select this model when both USB host functionality and I2C command control are required simultaneously. Verify support for specific audio codecs such as WMA and AAC if needed, as other variants in the series may lack these capabilities. Ensure the application utilizes the VQFP64 package constraints and power supply specifications.

Part Context

This component belongs to the BU9460x series of audio decoder LSIs from ROHM Semiconductor. It shares architectural similarities with the BU94601KV and BU94603KV but distinguishes itself by including the USB HID protocol conversion function and full iPod compatibility.

Replacement Considerations

BU94603KV: Lacks USB HID protocol conversion and iPod support. BU94601KV: Supports only MP3 format and lacks USB HID conversion.