BU94705KV-E2

Overview

The BU94705KV-E2 is a silicon monolithic integrated circuit designed as an MP3 encoder and WAV/AAC/WMA/MP3 decoder. It features a USB 2.0 Full Speed host interface, SD card I/F, CD-ROM I/F, audio DAC, system controller, and internal regulator. The device supports FAT analysis, ID3TAG/WMATAG/AACTAG analysis, and program download from external serial Flash ROM. Operating conditions include a supply voltage range of 3.0 V to 3.6 V, with typical operating currents of 26 mA (SD) and 51 mA (USB). It operates within a temperature range of -40°C to +85°C and utilizes a VQFP-80 package.

Feature Summary

• Integrated USB 2.0 Full Speed host interface supporting mass storage class communication.
• Built-in support for SD, SDHC, MMC, mini-SD, and micro-SD cards via SPI mode.
• Includes MP3 encoding capabilities for MPEG1 Layer3 formats.
• Features a built-in system controller managing interface control, decoding, and audio output operations.

Applications

• Audio products requiring multi-format playback
• Portable media players with recording functions
• Embedded audio systems with USB or SD storage

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required package and tape/reel specifications. Check current lifecycle status as availability may be limited. Ensure environmental compliance documentation aligns with project requirements before finalizing procurement orders.

Selection Notes

Select this model when both MP3 encoding and decoding are required alongside USB host functionality. Verify that the application design accommodates the VQFP-80 package dimensions. Ensure the master microcomputer supports the necessary I2C command interface protocols. Confirm power supply stability within the specified 3.0 V to 3.6 V range for reliable operation.

Part Context

This component belongs to the BU94605AKV/BU94607AKV/BU94702AKV/BU94705AKV series by ROHM Semiconductor. It shares the VQFP80 package and core architecture with siblings like the BU94702AKV, differing primarily in feature sets such as iPod support and encoding capabilities. The series targets integrated audio processing solutions requiring versatile media format handling.

Replacement Considerations

BU94702AKV-E2 serves as a functional substitute if MP3 encoding is not required. Both share identical packages and core decoding features. Verify firmware compatibility and pin configuration alignment during transition. Consult official documentation for specific feature differences regarding USB host configurations and supported file formats.