QT2C-32.768KAZC-T

Overview

The QT2C-32.768KAZC-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 32.768 kHz with a load capacitance of 9 pF. The component exhibits a frequency tolerance of ±30 ppm at 25°C and features a maximum equivalent series resistance (ESR) of 90,000 ohms. Packaged in a compact 2-pin SMD form factor measuring 2.0 x 1.2 mm, it is suitable for low-power timing circuits requiring stable clock signals.

Feature Summary

• Fundamental mode operation for precise timekeeping
• Compact 2-pin surface-mount package design
• Stable frequency performance under standard temperature conditions

Applications

• Real-time clock circuits in portable electronics
• Microcontroller system clock sources
• Low-power embedded device timing references

Procurement Notes

Verify the manufacturer designation carefully, as similar part numbers may originate from different suppliers such as TXC Corporation or QST Products LLC. Confirm that the specific suffix corresponds to the 9 pF load capacitance variant. Ensure the source document explicitly identifies QST as the producer to avoid substitution errors with functionally distinct components.

Selection Notes

Select this component when a 9 pF load capacitance is required for the oscillator circuit design. Compare against alternatives offering different ESR limits or tolerance levels if stricter stability is needed. Ensure the physical footprint matches the 2.0 x 1.2 mm requirement for the target PCB layout.

Part Context

This crystal belongs to the QT2C series of surface-mount resonators. It shares the same frequency and general package dimensions with variants like QT2C-32.768KAZB-T, which typically differ in load capacitance specifications. The series is commonly used in consumer electronics where space constraints limit the use of larger through-hole crystals.

Replacement Considerations

QT2C-32.768KAZB-T offers a 6 pF load capacitance instead of 9 pF. QT2C-32.768KDZB-T provides a tighter ±20 ppm tolerance. Direct substitution requires verifying the oscillator circuit's capacitive loading requirements to ensure frequency accuracy.