LTC455BW

Overview

The LTC455BW is a ceramic filter manufactured by Transko Electronics, Inc., designed for AM applications. It features a center frequency of 455 kHz with a tolerance of ±1.5 kHz. The component has an impedance of 1500 Ohms and utilizes a 4-SMD, J-Lead package. Key electrical specifications include a minimum bandwidth of 15 kHz at 6 dB attenuation and a maximum insertion loss of 6 dB. The device is RoHS3 compliant and lead-free.

Feature Summary

• Utilizes ceramic construction for stable RF filtering performance in AM receiver circuits.
• Designed with a 4-SMD J-Lead surface mount package for automated assembly compatibility.
• Optimized for intermediate frequency (IF) stages with specified impedance matching.

Applications

• AM radio receiver intermediate frequency filtering
• Consumer electronics requiring 455 kHz signal processing
• Industrial communication equipment IF stages

Procurement Notes

Verify the specific suffix (e.g., -TR vs standard) against the manufacturer's datasheet to ensure correct packaging and reel specifications. Confirm RoHS3 compliance status if environmental regulations apply to your manufacturing process. Cross-reference the impedance value of 1500 Ohms with circuit design requirements to ensure proper matching. Check for any recent product lifecycle changes or obsolescence notices from Transko Electronics.

Selection Notes

Select this component when a 455 kHz center frequency with 1500 Ohm impedance is required for AM demodulation stages. Ensure the PCB footprint supports the 4-SMD J-Lead configuration. Consider the 6 dB insertion loss budget within the overall receiver sensitivity calculations. Verify that the physical dimensions fit within the designated area on the printed circuit board layout.

Part Context

Transko Electronics produces the LTC455 series of ceramic filters, which are widely used in analog communication systems. The BW variant specifically denotes the 455 kHz center frequency with standard tolerances. These components serve as critical elements in superheterodyne receivers, providing selectivity and image rejection before detection.

Replacement Considerations

The LTC455BU is a documented alternative within the same series offering similar ceramic filter characteristics. Verify pinout compatibility and exact bandwidth specifications before substitution. Other variants like LTC455CW may exist but require careful comparison of impedance and frequency tolerances.