ECS-75SMF45A7.5B

Overview

The ECS-75SMF45A7.5B is a monolithic crystal filter manufactured by ECS Inc., designed for surface-mount applications. It operates at a center frequency of 45 MHz with a bandwidth of 7.5 kHz and an insertion loss of 4 dB. The component features a 350 Ohm impedance and utilizes a four-pole response architecture. It is housed in a compact 5 mm x 7 mm SMD ceramic package, suitable for space-constrained circuit designs requiring precise signal filtering.

Feature Summary

• Provides narrow bandwidth filtering with a four-pole response characteristic
• Utilizes miniature surface-mount ceramic packaging for compact integration
• Engineered for stable operation across industrial temperature ranges

Applications

• Intermediate frequency (IF) stages in communication receivers
• Signal processing circuits requiring specific 45 MHz channel selection
• Industrial control systems utilizing filtered analog signals

Procurement Notes

Verify the exact center frequency and bandwidth requirements against the 45 MHz specification before procurement. Confirm that the 350 Ohm impedance matches the source and load impedances in the target circuit design to ensure optimal performance and minimal reflection. Ensure the PCB footprint accommodates the 5 mm x 7 mm package dimensions and that soldering processes are compatible with the specified operating temperature range.

Selection Notes

Select this component when a fixed 45 MHz center frequency with a 7.5 kHz bandwidth is required. The 4 dB insertion loss should be evaluated against system sensitivity requirements. Consider the 350 Ohm impedance match for interface compatibility. The surface-mount form factor is ideal for automated assembly and high-density board layouts where vertical space is limited.

Part Context

This part belongs to the ECS-75SMF series of miniature SMD monolithic crystal filters from ECS Inc. The series is characterized by its small physical footprint and robust ceramic construction. These filters are commonly used in applications demanding reliable frequency discrimination in a compact form factor, distinguishing them from larger through-hole alternatives or tunable filters.

Replacement Considerations

Direct replacements must match the 45 MHz center frequency, 7.5 kHz bandwidth, and 350 Ohm impedance. Verify that any substitute component maintains the same 5 mm x 7 mm package dimensions and four-pole response characteristics to ensure mechanical and electrical compatibility without redesigning the PCB layout.