LTC455DU-TR

Overview

The LTC455DU-TR is a surface-mount ceramic filter manufactured by Transko Electronics, Inc., designed for AM radio receiver applications. It features a center frequency of 455 kHz with a tolerance of ±1.5 kHz. The device exhibits an insertion loss of 4 dB and operates with a minimum impedance of 1.5 kOhm. Electrical characteristics include a bandwidth of 20 kHz at the -6 dB point and a shape factor of 2.7. Additional specifications include a maximum attenuation of 40 dB at frequencies outside the passband, a capacitance of 2 pF, and a voltage rating of 10 V.

Feature Summary

• Provides selective frequency filtering for AM broadcast band reception
• Utilizes a compact three-terminal SMD J-Lead package for automated assembly
• Engineered to maintain signal integrity with low insertion loss

Applications

• AM radio receiver intermediate frequency stages
• Consumer audio equipment requiring 455 kHz filtering
• Industrial control systems utilizing AM modulation

Procurement Notes

Verify the specific suffix TR indicates tape-and-reel packaging configuration when sourcing components. Confirm that the manufacturer designation matches Transko Electronics, Inc. to ensure authenticity. Cross-reference the part number against current distributor catalogs to validate availability status prior to order placement.

Selection Notes

Select this component where a 455 kHz center frequency aligns with the system architecture. Ensure the PCB layout accommodates the 3-SMD J-Lead footprint dimensions. Verify that the 1.5 kOhm impedance requirement matches the connected amplifier stages to prevent signal reflection or mismatch losses in the circuit design.

Part Context

This component belongs to the family of fixed-frequency ceramic filters produced by Transko Electronics. These devices are standard solutions for intermediate frequency processing in analog communication circuits. The DU variant specifically denotes the surface-mount construction suitable for modern printed circuit board manufacturing processes.

Replacement Considerations

Direct substitutes may include other 455 kHz ceramic filters from different manufacturers provided they match the 3-SMD J-Lead package and electrical parameters. Verify pin compatibility and physical dimensions before integration.