MCF21.4M15B/SM756

Overview

The MCF21.4M15B/SM756 is a monolithic crystal filter manufactured by YIC, designed for surface-mount applications. It operates at a center frequency of 21.4 MHz with a bandwidth of 15 kHz. The component features an impedance of 1.8 kOhms and an insertion loss of 3 dB. It utilizes a 4-pole configuration to achieve its filtering characteristics. The physical package dimensions are 7 x 5 x 1.3 mm, classified under the SM756 series.

Feature Summary

• Monolithic crystal construction for stable frequency response
• Surface-mount design compatible with automated assembly
• Four-pole architecture providing defined selectivity

Applications

• Intermediate frequency (IF) filtering in communication receivers
• Signal processing stages requiring precise bandpass characteristics
• RF front-end modules in wireless transmission equipment

Procurement Notes

Verify the specific suffix designation against official YIC documentation to confirm impedance and loss parameters. Ensure the ordering code matches the required 1.8 kOhm impedance and 3 dB insertion loss specifications. Cross-reference the package outline drawing to confirm compatibility with PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when a 21.4 MHz center frequency with 15 kHz bandwidth is required. The 1.8 kOhm impedance rating must align with the circuit's source and load impedances. Consider the 3 dB insertion loss impact on signal strength within the system budget. Verify that the SMD package size fits the available board space constraints.

Part Context

This part belongs to the MCF series of monolithic crystal filters from YIC. These components are engineered for high reliability in electronic circuits. The SM756 designation indicates the specific surface-mount package type used for this family of products.

Replacement Considerations

Direct substitutes include the MCF21.4M15A/SM756, which shares the same frequency and bandwidth but differs in impedance and insertion loss specifications. Verify electrical parameter compatibility before substitution.