QT3CD-32.768KAZF-T

Overview

The QT3CD-32.768KAZF-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 tolerance of ±30 ppm. The component features a load capacitance of 12.5 pF and an equivalent series resistance (ESR) of 70 kOhms. It utilizes a 2-SMD, No Lead package with dimensions of 3.2x1.5 mm. The device is rated for operation within a temperature range of -40°C to +85°C, ensuring stability in various electronic environments.

Feature Summary

• Surface-mount design for automated assembly
• Stable frequency output for timing circuits
• Compact footprint suitable for space-constrained boards

Applications

• Automotive body electronics
• Industrial control systems
• Medical devices
• Personal electronics

Procurement Notes

Verify the specific suffix KAZF-T against official QST documentation to confirm the ±30 ppm tolerance and 70 kOhm ESR specifications. Ensure compatibility with PCB layout requirements for the 2-SMD no-lead package. Cross-reference manufacturer datasheets for storage conditions and soldering profiles to maintain component integrity during assembly.

Selection Notes

Select this component when a standard 32.768 kHz reference is required for low-cost timing applications. The ±30 ppm tolerance suits general-purpose clocks where high precision is not critical. Compare load capacitance requirements with the oscillator circuit design to ensure proper oscillation startup and stability without additional external capacitors.

Part Context

This part belongs to the QT3CD series of thin-film or bulk acoustic wave crystals from QST. These components are engineered for consumer and industrial electronics requiring reliable timekeeping. The series offers various tolerance options, with the KAZF-T variant providing a balance of cost and performance for non-critical clock sources.

Replacement Considerations

Direct substitutes include other 32.768 kHz SMD crystals with matching 12.5 pF load capacitance and similar physical dimensions. Verify that alternative parts meet the same ±30 ppm tolerance and 70 kOhm ESR specifications to ensure circuit compatibility.