LTC455CW

Overview

The LTC455CW is a ceramic band-pass filter manufactured by Transko Electronics, Inc. It features a center frequency of 455 kHz and a minimum bandwidth of 12.5 kHz at the 6 dB attenuation point. The component operates with an impedance of 1.5 kOhm and is designed for AM radio applications. It is housed in a compact 4-SMD, J-Lead package, suitable for surface-mount assembly.

Feature Summary

• Utilizes ceramic resonator technology for stable frequency selection
• Designed specifically for intermediate frequency filtering in AM receivers
• Provides defined bandwidth characteristics for signal isolation

Applications

• AM broadcast receiver intermediate frequency stages
• Radio communication equipment signal processing
• Consumer audio electronics requiring 455 kHz filtering

Procurement Notes

Verify the specific suffix 'CW' to ensure the correct package type and termination style are obtained. Confirm that the 1.5 kOhm impedance matches the circuit design requirements. Check datasheets for precise mechanical dimensions to ensure compatibility with PCB footprints. Ensure the component meets the required operating temperature range for the intended application environment.

Selection Notes

Select this component when a 455 kHz center frequency is required for AM detection circuits. The 12.5 kHz bandwidth provides adequate selectivity for standard AM broadcasting. The SMD package facilitates automated assembly processes. Consider the impedance matching with adjacent amplifier stages to minimize insertion loss and maintain signal integrity within the receiver chain.

Part Context

This part belongs to the LTC455 series of ceramic filters from Transko Electronics. These components are widely used in legacy and modern AM radio designs. The series offers various package options and bandwidth variations to suit different circuit constraints while maintaining consistent electrical performance standards for intermediate frequency applications.

Replacement Considerations

Direct substitutes include other 455 kHz ceramic filters with similar 12.5 kHz bandwidth and 1.5 kOhm impedance. Verify pinout compatibility for the 4-SMD J-Lead configuration before substitution. Alternative packages may require adapter solutions or PCB redesign.