BU94601KV-E2

Overview

The BU94601KV-E2 is a silicon monolithic integrated circuit manufactured by ROHM Semiconductor, functioning as an audio codec and MP3 decoder. 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 operates on a single 3.3V supply voltage with a minimum of 3.0V and maximum of 3.6V. It supports MPEG Audio Layer 1, 2, and 3 decoding at sample rates including 8k, 16k, 32k, 11.025k, 22.05k, 44.1k, 12k, 24k, and 48kHz. The component features a VQFP-64 package (12.00mm x 12.00mm x 1.60mm) and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates USB 2.0 Full Speed host interface and SD card interface for media access.
• Contains dedicated MP3 decode function supporting various MPEG layers and bitrates.
• Includes built-in audio DAC, sample rate converter, and sound effect functions.
• Supports standalone operation via key matrix or slave mode control through I2C interface.

Applications

• Audio products requiring MP3 playback from USB or SD sources
• Standalone music players with keyboard input
• Embedded audio systems controlled via I2C master microcomputer

Procurement Notes

Verify the specific suffix E2 against official documentation to confirm compliance details. Confirm availability status as distribution channels may list this part as obsolete or out of stock. Ensure the ordering part number matches the required reel quantity and packaging format specified in the manufacturer's datasheet before finalizing procurement.

Selection Notes

Select the BU94601KV-E2 when only MP3 decoding is required, as it does not support WMA or AAC formats unlike other members of the BU9460 series. Ensure the design accommodates the VQFP64 package dimensions and 3.3V operating voltage. Verify that the application requires either standalone key control or I2C slave communication capabilities provided by this specific model.

Part Context

This component belongs to the BU94601KV/BU94603KV/BU94604BKV series of USB Audio Decoder LSIs. While the BU94603KV and BU94604BKV support AAC and WMA decoding, the BU94601KV is specifically limited to MP3 decoding. All models share the same VQFP64 package and basic interface structures but differ in supported audio codecs and iPod compatibility.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consider evaluating the BU94603KV or BU94604BKV if additional codec support such as WMA or AAC is required, noting that these variants offer broader format compatibility while maintaining similar interface characteristics.

FAQ

Does the BU94601KV support WMA or AAC decoding?

No, the BU94601KV contains only the MP3 decode function. It does not support WMA or AAC decoding; those features are available in the BU94603KV and BU94604BKV models.

What is the operating supply voltage range for this IC?

The operating supply voltage (VDD1) ranges from 3.0V to 3.6V. The device includes an internal regulator for the core power supply.

Can the BU94601KV be controlled by an external microcomputer?

Yes, it supports Slave Mode (MODE2 and MODE3) which allows control from a master microcomputer via the I2C interface for commands such as play, stop, volume adjustment, and file browsing.