BU9457KV-E2

Overview

The BU9457KV-E2 is an audio codec and USB host audio decoder integrated circuit manufactured by ROHM Semiconductor. It supports MP3 decoding and features a single DAC output. The device operates within a supply voltage range of 3 V to 3.6 V and functions at temperatures between -40°C and +85°C. It utilizes I2C and USB interfaces for communication. The component is housed in a VQFP-64 package with SMD/SMT mounting style. Key electrical specifications include a signal-to-noise ratio of 96 dB and a typical operating current of 80 mA. The part is classified as obsolete.

Feature Summary

• Integrated USB host functionality combined with audio decoding capabilities
• Supports MP3 format playback through dedicated decoding logic
• Includes a single digital-to-analog converter for audio output

Applications

• USB audio host devices requiring MP3 playback
• Portable audio players with USB connectivity
• Embedded audio systems utilizing I2C control

Procurement Notes

This component is officially listed as obsolete or end-of-life by the manufacturer. Availability is restricted to existing stock or secondary market sources. Verification of authenticity and condition is critical due to the discontinued status. Buyers should confirm the specific revision and packaging type, such as cut tape or reel, when sourcing from distributors. Functional testing is recommended before integration into new designs.

Selection Notes

Designers should consider this part only for maintenance or legacy system repairs. New projects require alternative components due to the obsolete status. Ensure the application strictly requires the specific combination of USB host and MP3 decoding provided by this IC. Verify that the VQFP-64 package footprint matches the existing PCB layout. Check for compatible replacement codecs if redesigning the hardware.

Part Context

The BU9457KV-E2 belongs to the BU9457KV series of audio CODECs from ROHM Semiconductor. This series integrates interface and decoding functions for portable multimedia applications. The E2 suffix typically denotes environmental compliance or specific manufacturing revisions. Related parts in the family may offer similar interfaces but differ in supported formats or package options.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct pin-compatible replacements must be identified through official ROHM obsolescence notices or distributor cross-reference tools. No generic industry substitutes are verified.