QT3CD-32.768KEZC-T

Overview

The QT3CD-32.768KEZC-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 32.768 kHz with a frequency tolerance of ±10 ppm at 25°C. The component features a load capacitance of 9 pF and is housed in a compact 2-SMD, no-lead package measuring 3.2 x 1.5 x 0.9 mm. It supports an operating temperature range of -40°C to +85°C, ensuring reliable performance in various electronic environments.

Feature Summary

• Surface-mount design for automated assembly
• High frequency stability within ±10 ppm tolerance
• Compact footprint suitable for space-constrained PCB layouts

Applications

• Real-time clock circuits
• Microcontroller system clocks
• Portable consumer electronics

Procurement Notes

Verify the specific suffix 'EZC' against official QST documentation to confirm the exact load capacitance and tolerance specifications. Ensure compatibility with reflow soldering profiles defined in the manufacturer's datasheet. Confirm that the 9pF load capacitance matches the oscillator circuit requirements before integration into the final design.

Selection Notes

Select this component when a precise 32.768 kHz reference is required for low-power timing applications. The ±10 ppm tolerance offers higher accuracy than standard ±20 ppm variants. Consider the 3.2x1.5mm package size relative to available board space. Verify that the operating temperature range meets the environmental conditions of the target application.

Part Context

This part belongs to the QT3C series of kHz crystals from QST. The series includes various tolerance options such as ±20 ppm (suffix D) and ±50 ppm (suffix B). The QT3CD-32.768KEZC-T specifically denotes the 32.768 kHz frequency, ±10 ppm tolerance, and 9pF load capacitance configuration within this product line.

Replacement Considerations

Direct substitutes include other 32.768 kHz SMD crystals with identical 3.2x1.5mm footprints and 9pF load capacitance. Cross-reference with QST models like QT3CD-32.768KDZB-T if ±20 ppm tolerance is acceptable. Ensure any replacement maintains the same operating temperature range and mounting style.