BU9428KV-E2

Overview

The BU9428KV-E2 is an audio decoder interface integrated circuit manufactured by ROHM Semiconductor. It supports I2C and USB interfaces for digital audio data transmission. The device integrates one Digital-to-Analog Converter (DAC) channel with no Analog-to-Digital Converter (ADC) channels. It operates within a supply voltage range of 3 V to 3.6 V, drawing a typical operating current of 24 mA. The component delivers a signal-to-noise ratio (SNR) of 93 dB and maintains a total harmonic distortion plus noise (THD+N) of 0.03%. It functions reliably across an extended temperature range from -40°C to +85°C and is housed in a 64-pin VQFP package suitable for surface mount technology.

Feature Summary

• Supports I2C and USB communication protocols for digital audio control and data transfer
• Integrates a single DAC output channel for audio signal reconstruction
• Includes protection against moisture sensitivity during storage and handling

Applications

• Digital audio decoding systems requiring USB or I2C connectivity
• Consumer electronics utilizing high-fidelity audio output stages
• Embedded audio processing units operating within standard voltage limits

Procurement Notes

Verify the current lifecycle status before integration, as this component may be subject to discontinuation or obsolescence notices. Confirm RoHS compliance details through official manufacturer documentation. Ensure that the specific ordering suffix matches the required package and tape-and-reel specifications. Check for any pending production change notifications that might affect pin compatibility or electrical characteristics. Validate availability through authorized distributors given potential supply constraints.

Selection Notes

Select this component when a single-channel DAC solution with USB or I2C interface capability is required. Ensure the design accommodates the 3 V to 3.6 V supply voltage range and the 24 mA typical current consumption. Verify that the 64-pin VQFP footprint fits the PCB layout constraints. Consider the thermal performance requirements for operation up to +85°C. Evaluate if the 93 dB SNR meets the specific audio quality standards of the target application.

Part Context

This part belongs to the BU9428KV series of audio decoders from ROHM Semiconductor. It is categorized under interface ICs specifically designed for audio codec applications. The series focuses on providing digital-to-analog conversion capabilities with standard digital interfaces. Similar parts in the family may offer different channel counts or interface options.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's official documentation for recommended alternatives or cross-reference guides. Verify functional equivalence regarding interface protocols, voltage levels, and package dimensions before considering any replacement.