LA1845N-E

Overview

The LA1845N-E is a single-chip tuner IC designed for home stereo mini systems. It provides electronic tuning functions using SD and IF-count techniques. The device incorporates an integrated MPX VCO, eliminating the need for ceramic resonators. It features a built-in pilot canceler and adjacent channel interference rejection at 114kHz and 190kHz. Internal blocks include RF amplifier, mixer, oscillator, IF amplifier, detector, AGC, PLL stereo decoder, and audio muting.

Feature Summary

• Integrated MPX VCO circuit removes requirement for external ceramic resonators
• Built-in adjacent channel interference rejection function for improved signal clarity
• Supports both SD and IF-count electronic tuning techniques
• Includes pilot canceler to reduce noise in stereo reception

Applications

• Mini system FM tuners
• Home stereo receiver circuits
• Single-chip tuner modules
• Audio equipment with electronic tuning requirements

Procurement Notes

Verify the exact suffix designation against the manufacturer's official documentation to confirm pinout compatibility and functional specifications. Ensure the component matches the required operating temperature range and supply voltage ratings specified in the datasheet before integration into the design.

Selection Notes

Select this component for applications requiring a compact single-chip solution for FM tuning. It is suitable where reducing external passive components is critical. Consider the integrated VCO and pilot canceler features when designing for high-fidelity stereo reception without complex external circuitry.

Part Context

The LA1845N belongs to Sanyo's series of monolithic linear ICs intended for home stereo applications. It consolidates multiple tuner functions into one package, simplifying the design of mini systems. The device replaces discrete tuner designs by integrating RF, IF, and demodulation stages.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference data through official manufacturer channels or authorized distributors before considering alternative components.