LA1845N-E-ON

Overview

The LA1845N-E-ON is a single-chip tuner integrated circuit designed for home stereo applications. It provides electronic tuning functions utilizing SD and IF-count techniques. The device integrates an MPX VCO, eliminating the need for external ceramic resonators. Key internal blocks include RF amplifier, mixer, oscillator, IF amplifier, detector, AGC, PLL stereo decoder, and pilot canceler. It supports adjacent channel interference rejection at 114kHz and 190kHz frequencies.

Feature Summary

• Integrates MPX VCO to remove requirement for external ceramic resonators
• Built-in adjacent channel interference rejection function
• Supports both SD and IF-count tuning techniques
• Incorporates built-in pilot canceler

Applications

• Mini systems
• Home stereo equipment
• Electronic tuning circuits

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package type and pinout alignment with the original Sanyo design before integration. Ensure supply chain sources provide valid traceability documentation to avoid counterfeit components in production environments.

Selection Notes

Select this component for designs requiring a compact single-chip solution for FM/AM tuning. It is suitable when minimizing external passive components is critical due to space constraints. The integrated VCO and pilot canceler simplify the schematic layout compared to discrete tuner solutions.

Part Context

Originally manufactured by Sanyo Semiconductor, this part is now distributed under the onsemi brand following corporate acquisitions. The LA1845N series represents a legacy single-chip tuner architecture. It serves as a specialized IC for consumer audio electronics rather than general-purpose logic or power management.

Replacement Considerations

Public confirmed substitute part numbers are not available in verified documentation.