BU94605KV-E2

Overview

The BU94605AKV-E2 is a USB Audio Decoder LSI manufactured by ROHM Semiconductor, designed for AAC/WMA/MP3 decoding with SD memory card support. It operates within a supply voltage range of 3.0 V to 3.6 V and draws a typical operating current of 51 mA when playing USB memory. The device features a built-in audio DAC with a signal-to-noise ratio of 96 dB and total harmonic distortion plus noise of 0.005%. It supports I2C, SPI, and USB interfaces, includes one DAC channel, and lacks ADC functionality. The component is housed in a VQFP-80 package (14.00mm x 14.00mm x 1.60mm) and functions reliably across an operating 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.
• Supports decoding of MP3, WMA, AAC, and WAV audio formats with FAT file system analysis.
• Includes a built-in system controller, sample rate converter, and audio DAC with sound effects.
• Enables program download from external serial Flash ROM via IPL function.

Applications

• Audio products requiring USB host and SD card playback capabilities
• Portable media players supporting multiple audio codecs
• Embedded audio systems with microcomputer control via I2C

Procurement Notes

Verify the exact ordering suffix against the manufacturer's datasheet, as variants like BU94605AKV-E2 indicate specific packaging configurations such as Reel or Tray. Confirm availability status, as this model may be discontinued or subject to limited distribution channels. Ensure compliance with RoHS directives and moisture sensitivity levels prior to integration into production assemblies.

Selection Notes

Select this component for applications requiring integrated USB host and SD card interfaces without external decoders. Note that MP3 encoding and iPod support are not available in the BU94605AKV variant; these features require the BU94702AKV or BU94705AKV models respectively. Ensure the design accommodates the VQFP-80 package dimensions and thermal requirements for the specified operating temperature range.

Part Context

The BU94605AKV-E2 belongs to the BU94605AKV series of USB Audio Decoder LSIs from ROHM Semiconductor. This series integrates MP3, WMA, and AAC decoding capabilities alongside USB host and SD card interfaces. The part is designed for audio applications requiring direct playback from USB mass storage devices or SD memory cards, controlled via an external microcomputer through I2C commands.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.