QT2C-32.768KEZF-T

Overview

The QT2C-32.768KEZF-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 ±10 ppm at 25°C. The component features a load capacitance of 12.5 pF and an equivalent series resistance (ESR) of 90 kΩ. It is designed for operation within a temperature range of -40°C to +85°C. The physical package dimensions are 2.0 mm x 1.2 mm in a two-terminal SMD configuration.

Feature Summary

• Provides stable timing signals for real-time clock applications
• Operates reliably across extended industrial temperature ranges
• Utilizes fundamental frequency resonance for precise binary division

Applications

• Real-time clock circuits
• Microcontroller system clocks
• Portable electronic devices requiring low power consumption

Procurement Notes

Verify the specific suffix 'KEZF' against official QST documentation to confirm the exact frequency tolerance and load capacitance parameters. Ensure that the required 12.5 pF load capacitance matches the target circuit design specifications before procurement. Cross-reference the manufacturing date code and environmental compliance data with the latest datasheet to ensure compatibility with current assembly processes.

Selection Notes

Select this component when a 32.768 kHz frequency with ±10 ppm accuracy is required for timekeeping functions. Consider the 12.5 pF load capacitance requirement during PCB layout to ensure frequency stability. Evaluate the 90 kΩ ESR against the oscillator circuit's drive level limitations to prevent over-driving the crystal. Confirm that the 2.0x1.2 mm footprint fits within the available board space constraints.

Part Context

This part belongs to the QT2C series of thin-film or bulk acoustic wave crystals designed for compact electronics. The series offers various tolerance options and load capacitances to suit different oscillator designs. The 32.768 kHz frequency is standard for dividing down to one second intervals in digital systems due to its binary divisibility.

Replacement Considerations

Compatible substitutes include other 32.768 kHz crystals with ±10 ppm tolerance and 12.5 pF load capacitance in a 2.0x1.2 mm SMD package. Verify that alternative parts maintain similar ESR values and temperature stability characteristics to ensure circuit performance parity.