CM309A53.125MABJT

Crystals Overview

The CM309A53.125MABJT is a surface-mount crystal oscillator manufactured by Citizen Finedevice Co Ltd. It operates at a fundamental frequency of 53.125 MHz with a tolerance of ±30ppm. The component utilizes a 4-SOJ package with a 2.85mm pitch and has a maximum seated height of 4.60mm. Key electrical parameters include a load capacitance of 18pF and an equivalent series resistance of 80 Ohms. It functions in third overtone mode and is noted as non-RoHS compliant.

Crystals Feature Summary

• Surface-mount design utilizing a 4-SOJ package configuration
• Third overtone operational mode for stable frequency generation
• Specific load capacitance requirement of 18pF

Crystals Applications

• High-speed serial communication interfaces requiring precise clocking
• Network equipment timing circuits
• Digital signal processing systems

Crystals Procurement Notes

Verify RoHS compliance status prior to integration, as this specific part number is identified as non-compliant. Confirm package dimensions match the target PCB footprint, specifically the 4.85mm length and 5.08mm width. Ensure the assembly process accommodates the 4.60mm maximum seated height constraint. Validate that the 80 Ohm ESR aligns with the oscillator circuit design requirements.

Crystals Selection Notes

Select this component when a 53.125 MHz third overtone crystal is required in a surface-mount format. The 18pF load capacitance must match the system's capacitive load. Consider the non-RoHS status if environmental regulations apply. The 4-SOJ package offers a compact solution compared to larger through-hole alternatives while maintaining the necessary mechanical stability for the specified operating conditions.

Crystals Part Context

This crystal belongs to the CM309 series from Citizen Finedevice, designed for surface-mount applications. The series typically supports various frequencies with standardized package dimensions. The CM309A variant specifically denotes the 4-SOJ form factor. This model provides a specialized solution for applications needing precise timing at 53.125 MHz without the bulk of traditional packaging.

Crystals Replacement Considerations

The CM309B53.125MABJT is a documented alternative within the same product line. Verify dimensional compatibility as the B-series may differ slightly in physical profile. Ensure electrical parameters including frequency tolerance and load capacitance remain identical for direct substitution.