BD3402KS2

Overview

The BD3402KS2 is a two-channel audio signal processor manufactured by Rohm Semiconductor, designed for pre-amplifier applications. It operates within a supply voltage range of 8V to 9.5V and functions at temperatures between -25°C and 75°C. The device utilizes a 64-SQFP-T (12x12) surface-mount package with a 2-wire serial interface. Key electrical specifications include an input gain adjustment of -5/0/3.5 dB via AD-SW, a typical output voltage of 2.5V, and a THD+N of 0.005%. It features 28 tone control bands, low noise performance with 2.5 µVrms output noise, and consumes 28 mA of quiescent current.

Feature Summary

• Provides surround and bass boost capabilities with soft-switching to reduce shock sound during switching operations.
• Built-in preamplifier for cassette recording/playing minimizes external component requirements and board space.
• Volume and tone controls implemented via resistance ladder circuitry for high performance with low noise and distortion.
• Energy-saving design using BiCOMS process results in low current consumption and reduced internal regulator heat.

Applications

• Pre-amplifier circuits
• Cassette deck recording and playback systems

Procurement Notes

This component is designated as 'Manufacturing Discontinued' and is no longer available for purchase. Verification of current stock or alternative sourcing requires checking distributor inventories directly, as official production has ceased. Designers should consider obsolescence management strategies when integrating this part into new projects.

Selection Notes

Select the BD3402KS2 only for legacy system maintenance or repair where specific historical compatibility is required. For new designs, evaluate modern alternatives that offer similar 2-channel processing, 2-wire serial interfaces, and comparable power supply ranges while ensuring active manufacturing status and long-term availability support.

Part Context

The BD3402KS2 belongs to Rohm's audio signal processor family, specifically tailored for analog audio processing tasks. It shares functional similarities with the BD3401KS2 but includes additional features like built-in preamplifiers and specific tone control configurations. The SQFP-T64 package allows for compact PCB integration in consumer audio equipment.

Replacement Considerations

No public confirmed substitute part numbers are listed in the provided documentation. Users requiring replacement components should consult Rohm Semiconductor's official obsolescence notices or contact authorized distributors for recommended cross-reference models.