QT2C-32.768KDZY-T

Overview

The QT2C-32.768KDZY-T is a surface-mount quartz crystal oscillator manufactured by QST Products, LLC. It operates at a fundamental frequency of 32.768 kHz with a frequency tolerance of ±20 ppm at 25°C. The component features a load capacitance of 7 pF and an equivalent series resistance (ESR) of 90 kΩ. Designed for reliability in electronic timing circuits, it supports an operating temperature range from -40°C to +85°C. The device utilizes a two-pin ceramic SMD package with dimensions of 2.0 x 1.2 mm.

Feature Summary

• Fundamental mode operation ensures stable frequency generation for precise timekeeping applications.
• Wide industrial temperature rating allows consistent performance across extreme environmental conditions.
• Compact surface-mount design facilitates automated assembly and space-constrained PCB layouts.

Applications

• Real-time clock modules requiring accurate timebase signals
• Microcontroller system oscillators for embedded timing control
• Portable consumer electronics utilizing low-power crystal references

Procurement Notes

Verify the specific ordering suffix to confirm load capacitance and tolerance specifications, as variations exist within the product family. Ensure compatibility with the target circuit's capacitive load requirements before integration. Confirm that the ceramic package type meets the mechanical constraints of the printed circuit board design. Cross-reference the datasheet for any updates regarding material compliance or manufacturing changes.

Selection Notes

Select this component when a 32.768 kHz reference is required for low-frequency timing applications. The ±20 ppm tolerance suits general-purpose clocks where high precision is not critical. Consider the 90 kΩ ESR value to ensure proper oscillator circuit startup and stability. The 7 pF load capacitance must match the external capacitors used in the design to maintain frequency accuracy.

Part Context

This part belongs to the QT2C series of surface-mount crystals from QST Products, LLC. The series offers various load capacitances and tolerances to suit different oscillator designs. The QT2C-32.768KDZY-T specifically denotes the 7 pF load variant with standard industrial temperature grading. It serves as a fundamental-mode resonator for digital systems requiring reliable second-level timing.

Replacement Considerations

The QT2C-32.768KDZB-T is a documented alternative within the same series, featuring a 6 pF load capacitance instead of 7 pF. Designers must verify if the circuit can accommodate the difference in load capacitance without affecting frequency accuracy. Other variants may offer different tolerances or temperature ranges but require careful electrical matching.