WC26SMFD-32.768KHZ-T

Crystals Overview

The MMD WC26SMFD-32.768KHZ-T is a fundamental mode quartz crystal resonator operating at 32.768 kHz. It features a frequency tolerance of ±20 ppm and a load capacitance of 12.5 pF. The component utilizes a cylindrical can package with radial leads, measuring approximately 6.5 mm in diameter and 11.9 mm in total length. It exhibits an equivalent series resistance (ESR) of up to 50 kΩ and supports a maximum drive level of 1 µW. Designed for standard applications, it operates within a temperature range of -40°C to +85°C and complies with RoHS standards.

Crystals Feature Summary

• Fundamental oscillation mode ensures stable timing performance
• Standard cylindrical metal lid construction for mechanical durability
• RoHS compliant manufacturing process
• Radial lead configuration facilitates through-hole mounting

Crystals Applications

• Real-time clock circuits in consumer electronics
• Precision timekeeping modules
• Low-power IoT device synchronization
• General-purpose digital timer systems

Crystals Procurement Notes

Verify the specific suffix 'SMFD' against official MMD documentation to confirm the exact load capacitance and packaging variant. Ensure the selected RTC circuit design matches the 12.5 pF load requirement to maintain frequency accuracy. Confirm that the 50 kΩ ESR limit aligns with the oscillator's startup requirements. Cross-reference the physical dimensions with the PCB footprint to ensure proper clearance for the cylindrical can package.

Crystals Selection Notes

Select this component when a standard 32.768 kHz reference is required for non-critical timing applications. The ±20 ppm tolerance suits general consumer devices rather than high-precision industrial instruments. Consider the 12.5 pF load capacitance compatibility with the host oscillator circuit. Evaluate the radial lead spacing against available board space constraints.

Crystals Part Context

This part belongs to the MMD WC26 series, which represents standard cylindrical 32.768 kHz crystals. The series offers various load capacitance options and package variations to suit different assembly needs. The WC26 designation indicates a specific physical size profile common in the industry. This model provides a cost-effective solution for mass-produced electronic goods requiring basic timekeeping functions.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' WC26-sized 32.768 kHz crystals with matching 12.5 pF load capacitance and ≤50 kΩ ESR. Verify pin-to-pin compatibility regarding lead spacing and overall height before substitution.