LTM455DU

Overview

The LTM455DU is a four-element ceramic bandpass filter manufactured by ECS Inc. It operates at a center frequency of 455 kHz with a nominal impedance of 1500 ohms. The component features an ultra-small profile measuring 6.5 mm in length and width, designed for through-hole mounting. It offers high selectivity suitable for communication applications, with a maximum insertion loss of 4 dB.

Feature Summary

• Ultra-small size with a 6.5 mm profile
• High selectivity design for communication use
• Four-element ceramic construction

Applications

• Communication equipment signal filtering
• AM receiver intermediate frequency stages
• Electronic circuit noise suppression

Procurement Notes

Verify the current lifecycle status as the part may be obsolete. Confirm RoHS compliance requirements against specific project standards. Ensure the 1500 ohm impedance matches the circuit design. Check for alternative sourcing due to potential discontinuation.

Selection Notes

Select this component when a 455 kHz center frequency is required for AM applications. Ensure the circuit supports 1500 ohm impedance. Consider the physical dimensions for PCB layout constraints. Verify compatibility with through-hole assembly processes.

Part Context

This component belongs to the LTM455U series of ceramic filters from ECS Inc. The series includes variants with different bandwidths ranging from 4 kHz to 30 kHz. These filters are designed for compact communication devices requiring precise frequency selection.

Replacement Considerations

Check for direct substitutes within the LTM455U series such as LTM455BU or LTM455CU if bandwidth variations are acceptable. Verify pinout and impedance compatibility before substitution.