WC315-32.768KHZ-T

Crystals Overview

The MMD WC315-32.768KHZ-T is a surface-mount quartz crystal resonator designed for real-time clock applications. It operates at a nominal frequency of 32.768 kHz with a standard tolerance of ±20 ppm at 25°C. The device features a flexural mode oscillation structure housed in a compact 2-SMD package measuring 3.3 mm x 1.6 mm x 0.9 mm. Key electrical specifications include a maximum equivalent series resistance (ESR) of 70 kΩ and a typical shunt capacitance of 1.0 pF. It supports a load capacitance of 12.5 pF and maintains an operating temperature range from -40°C to +85°C.

Crystals Feature Summary

• Compact SMD form factor optimized for space-constrained PCB layouts
• Flexural mode design ensures low power consumption suitable for battery-operated devices
• Industrial temperature rating provides stable performance across wide thermal ranges

Crystals Applications

• Real-time clock circuits in consumer electronics
• Battery-powered IoT sensor nodes
• Portable medical monitoring devices

Crystals Procurement Notes

Verify the specific suffix against the manufacturer's official part number guide, as variations may exist regarding packaging or tolerance grades. Confirm that the 12.5pF load capacitance aligns with the target RTC controller requirements. Ensure compliance with RoHS standards if required by regional regulations. Cross-reference the ESR limits with the oscillator circuit design to guarantee reliable startup conditions under all operating temperatures.

Crystals Selection Notes

Select this component when a balance between small footprint and industrial reliability is required. The 70kΩ ESR limit accommodates standard low-power oscillator designs without requiring excessive drive levels. Consider custom tolerance options if tighter frequency accuracy than ±20ppm is necessary for long-term drift management. Validate the mechanical height constraint against the final assembly stack-up before finalizing the BOM.

Crystals Part Context

This part belongs to the WC315 series, which targets applications demanding high stability in minimal volume. It serves as a direct replacement for legacy through-hole cylindrical crystals where board space is limited. The series is engineered to meet the stringent power and size constraints of modern wearable and handheld instrumentation while maintaining quartz-based timing precision.

Crystals Replacement Considerations

Direct pin-to-pin replacements within the same family include other WC315 variants with different suffixes for packaging or tolerance adjustments. Verify that substitute parts maintain the same 12.5pF load capacitance and 70kΩ max ESR to prevent oscillator failure.