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The CFMH4-21.400-F19IL04AK is a quartz crystal filter manufactured by Suzhou Hangjing Elec&Tech Co.,Ltd. It belongs to the CFMH4 series and operates at a center frequency of 21.4 MHz. The component features a bandwidth specification associated with the F19 suffix, indicating its filtering characteristics within this specific model designation.
Verify the exact electrical parameters against the official datasheet before integration. Confirm that the center frequency and bandwidth specifications match the circuit requirements. Ensure the package type and pinout are compatible with the PCB layout. Check for any specific handling instructions regarding electrostatic discharge during assembly.
Select this component when a 21.4 MHz center frequency is required. Consider the CFMH4 series form factor for space constraints. Evaluate the bandwidth requirements against the F19 specification. Ensure compatibility with existing through-hole manufacturing processes.
Suzhou Hangjing specializes in quartz frequency control units. The CFMH4 series represents their line of crystal filters. This part number indicates a specific frequency and bandwidth variant within that product family.
No public substitute part numbers are confirmed for this specific model. Cross-referencing requires matching center frequency, bandwidth, and physical dimensions exactly.