LTC455DU

Overview

The LTC455DU is a ceramic filter manufactured by Transko Electronics, Inc., designed for AM radio applications. It features a center frequency of 455kHz and a bandwidth of 20 kHz. The component exhibits an impedance of 1.5kOhm and utilizes a 3-SMD, J-Lead package configuration. This device serves as a drop-in replacement for discontinued Murata series filters including SFSCE, SFECF, SFECV, and SFECK, maintaining fit, form, and function compatibility.

Feature Summary

• Designed specifically for AM radio signal filtering applications
• Provides precise center frequency selection at 455kHz
• Offers standardized impedance characteristics for circuit integration

Applications

• AM radio receiver intermediate frequency stages
• Replacement for discontinued Murata SFSCE series components
• Replacement for discontinued Murata SFECF series components
• Replacement for discontinued Murata SFECV series components
• Replacement for discontinued Murata SFECK series components

Procurement Notes

Verify that the specific application requires a 455kHz center frequency with 20 kHz bandwidth to ensure functional compatibility. Confirm that the 3-SMD J-Lead package footprint matches the existing PCB layout constraints. Ensure the design accounts for the 1.5kOhm impedance specification to maintain proper signal transfer characteristics within the target circuit architecture.

Selection Notes

Select this component when replacing discontinued Murata ceramic filters such as the SFSCE, SFECF, SFECV, or SFECK series. The LTC455DU provides equivalent fit, form, and function performance. Consider the 3-SMD J-Lead package dimensions during mechanical integration. Validate that the 455kHz center frequency aligns with the system's intermediate frequency requirements for optimal signal processing.

Part Context

Transko Electronics positions the LTC455DU as a direct substitute for legacy Murata ceramic filter products that were discontinued starting in March 2023. This component belongs to the broader category of ceramic filters intended for radio frequency applications. It maintains industry-standard specifications to facilitate seamless transition for manufacturers requiring reliable AM band filtering solutions without redesigning their hardware infrastructure.

Replacement Considerations

Officially documented replacements include Murata models SFSCE, SFECF, SFECV, and SFECK. These are confirmed as drop-in alternatives with matching fit, form, and function.