BD3873FS-E2

Audio Special Purpose Overview

The BD3873FS-E2 is a sound processor manufactured by ROHM Semiconductor, designed for consumer audio applications. It integrates a two-band equalizer and operates on a single power supply ranging from 4.5V to 9.5V. The device features a 2-wire serial interface (I²C-compatible) for control, with a typical quiescent current of 8mA. Key electrical specifications include an input gain range up to 27dB, a volume range of 0 to -87dB in 1dB steps, and a THD+N of 0.01%. It supports surround function construction without external components and utilizes BiCMOS technology for energy efficiency.

Audio Special Purpose Feature Summary

• Integrated two-band equalizer (Bass/Treble) with flexible center frequencies using external components
• Low current consumption design utilizing BiCMOS process (Iq: 8mA)
• Surround function constructible without external components
• Mute switch capability via input pin for cross-talk suppression
• 2-wire serial interface for control

Audio Special Purpose Applications

• Consumer audio equipment requiring integrated tone control
• Systems needing low-power sound processing
• Audio devices requiring built-in surround functionality

Audio Special Purpose Procurement Notes

The BD3873FS-E2 is designated as 'Manufacturing Discontinued' (EOL). This status indicates that the product is no longer available for new production orders and cannot be purchased from authorized distributors. Existing stock may be limited or unavailable. Designers should verify end-of-life notifications and consider alternative components for new projects.

Audio Special Purpose Selection Notes

This component requires a supply voltage between 4.5V and 9.5V and operates within a temperature range of -40°C to 85°C. It is housed in a 24-pin SSOP-A package. Selection should account for its discontinued status and the need for external components to define bass filter characteristics. Verify compatibility with the 2-wire serial bus protocol and ensure sufficient board space for the required passive components for EQ adjustment.

Audio Special Purpose Part Context

The BD3873FS-E2 belongs to ROHM's line of audio signal processors. It is part of a series aimed at simplifying circuit design by integrating tone controls and volume management. The 'E2' suffix typically denotes RoHS compliance, consistent with other ROHM parts in this family. It serves as a specialized IC for managing audio signal quality in compact consumer electronics.

Audio Special Purpose Replacement Considerations

Due to the manufacturing discontinuation status, direct replacement requires evaluating newer ROHM audio processors or competitors' equivalents with similar 2-wire interfaces, 24-SSOP packages, and dual-band EQ capabilities. Verify pinout compatibility and electrical parameter alignment before substitution.