QT3C-32.768KEZF-T

Overview

The QT3C-32.768KEZF-T is a quartz crystal oscillator manufactured by TXC Corporation, distributed by QST. It operates at a fundamental frequency of 32.768 kHz with a frequency tolerance of ±10 ppm at 25°C. 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 body dimensions of 3.0 x 1.5 mm. The device is designed for surface-mount assembly and supports an operating temperature range starting from -40°C.

Feature Summary

• Provides precise timing signals at 32.768 kHz with high stability
• Utilizes a compact 2-SMD no-lead footprint for space-constrained designs
• Ensures reliable operation across extended industrial temperature ranges

Applications

• Real-time clock circuits in consumer electronics
• Microcontroller system oscillators
• Low-power embedded devices requiring accurate timekeeping

Procurement Notes

Verify the manufacturer designation as TXC Corporation when sourcing from QST distributors. Confirm the specific suffix KEZF-T corresponds to the ±10 ppm tolerance and 12.5 pF load capacitance requirements. Ensure compatibility with standard reflow soldering profiles for 2-SMD packages. Check for RoHS compliance status if required by project specifications.

Selection Notes

Select this component when a 32.768 kHz reference is needed with tighter tolerance than standard ±30 ppm options. The 12.5 pF load capacitance must match the circuit design requirements. Consider the 70 kOhm ESR value for oscillator circuit stability. The small 3.0 x 1.5 mm size is suitable for miniaturized portable applications.

Part Context

This part belongs to the QT3C series of thin-package quartz crystals. The series offers various tolerance grades indicated by middle letters in the model number. The KEZF variant specifically denotes the ±10 ppm accuracy class. It serves as a direct replacement for other 32.768 kHz crystals in similar form factors within timing applications.

Replacement Considerations

Compatible substitutes include QT3C-32.768KDZY-T for ±20 ppm tolerance and QT3C-32.768KAZY-T for ±30 ppm tolerance. Verify that the load capacitance and ESR values remain acceptable for the target oscillator circuit when switching between tolerance grades.