QT3CD-32.768KHZF-T

Overview

The QT3CD-32.768KHZF-T is a fundamental quartz crystal oscillator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 32.768 kHz with a tolerance of ±10 ppm. The component utilizes a 2-SMD, no-lead package configuration and features a load capacitance of 12.5 pF. Its physical dimensions are specified as 3.2 mm in length, 1.5 mm in width, and 0.9 mm in height. This device is engineered to provide stable timing signals for electronic circuits requiring precise low-frequency reference.

Feature Summary

• Fundamental mode quartz crystal construction for stable oscillation
• Surface-mount design with no-lead termination for automated assembly
• Compact 3.2x1.5 mm footprint suitable for space-constrained PCB layouts

Applications

• Real-time clock circuits in consumer electronics
• Microcontroller system timing references
• Wearable device synchronization modules

Procurement Notes

Verify the specific manufacturer designation when sourcing, as similar part numbers exist across different vendors such as TXC or QST. Confirm that the load capacitance requirement matches the target circuit design, as variations like 9pF or 12.5pF are common within this family. Ensure the selected variant meets the required temperature stability specifications for the intended operating environment.

Selection Notes

Select this component when a standard 32.768 kHz reference is required for timekeeping functions. The ±10 ppm tolerance offers adequate accuracy for general-purpose real-time clocks. Consider the 12.5 pF load capacitance compatibility with the host oscillator circuit. The no-lead SMD package facilitates high-volume manufacturing processes compared to traditional leaded alternatives.

Part Context

This component belongs to the QT3CD series of surface-mount crystals from QST. These devices are widely used in portable electronics where size and power efficiency are critical. The 32.768 kHz frequency is a standard choice for dividing down higher clock rates to generate one-second intervals for digital timekeeping applications.

Replacement Considerations

The QT3CD-32.768KEZC-T serves as a verified substitute within the same product line, offering identical frequency but differing in load capacitance (9pF). Ensure circuit compatibility regarding load capacitance before swapping these variants.