CSA309-33.000MABJ

Crystals Overview

The CSA309-33.000MABJ is a passive quartz crystal resonator manufactured by Citizen Finedevice Co Ltd. It operates at a nominal frequency of 33 MHz with a frequency tolerance of ±30 ppm and stability of ±50 ppm. The component features an equivalent series resistance (ESR) of 100 Ohms and a load capacitance of 18 pF. It utilizes a cylindrical can radial package, measuring approximately 3.00 mm in diameter and 8.80 mm in length. Designed for surface mount applications, it supports base harmonic operation mode.

Crystals Feature Summary

• Compact cylindrical can radial package suitable for space-constrained designs
• Passive quartz crystal resonator construction
• Surface mount installation style

Crystals Applications

• Precision timing circuits requiring 33 MHz reference
• Portable electronic devices
• Communication equipment modules

Crystals Procurement Notes

Verify the specific suffix 'UB' against the requested part number to ensure correct packaging and handling specifications. Confirm that the 100 Ohm ESR and 18 pF load capacitance align with the target oscillator circuit design requirements before finalizing procurement decisions.

Crystals Selection Notes

Select this component when a 33 MHz passive crystal with moderate ESR is required. Ensure the host circuit provides the specified 18 pF load capacitance to achieve the stated ±30 ppm frequency tolerance. Consider the physical dimensions of the cylindrical can package during PCB layout planning.

Crystals Part Context

This component belongs to the CSA309 series of small-volume cylindrical crystals from Citizen Finedevice. These resonators are engineered for use in compact consumer electronics and communication devices where reliable timing signals are essential. The series emphasizes miniaturization while maintaining standard electrical characteristics for general-purpose timing applications.

Crystals Replacement Considerations

Direct substitutes include other CSA309 variants with matching 33 MHz frequency, such as CSA309-33.000MABJ-UB, provided the load capacitance and ESR specifications remain compatible with the existing circuit design.