QT3C-32.768KBZY-T

Overview

The QT3C-32.768KBZY-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precision timing applications. It operates at a fundamental frequency of 32.768 kHz with a load capacitance of 7 pF. The component features a compact SMD package measuring 3.0 x 1.5 mm and a seated height of 0.75 mm. It offers a frequency tolerance of ±50 ppm at 25°C and functions within an operating temperature range of -40°C to +85°C. This device utilizes ceramic construction suitable for low-power circuits.

Feature Summary

• Compact surface-mount design with 3.0 x 1.5 mm dimensions
• Ceramic construction for stable oscillation
• Optimized for 7 pF load capacitance environments

Applications

• Real-time clock circuits in portable electronics
• Microcontroller system clocks
• Low-power embedded devices

Procurement Notes

Verify the specific suffix 'B' confirms the ±50 ppm tolerance requirement against your circuit design specifications. Ensure the PCB footprint matches the 3.0 x 1.5 mm package outline and 0.75 mm height constraints. Confirm compatibility with the 7 pF load capacitance used in your oscillator schematic to maintain frequency accuracy within operational limits.

Selection Notes

Select this component when a standard 32.768 kHz reference is required for timekeeping or low-frequency division. The ±50 ppm tolerance suits applications where high precision is not critical compared to ±10 ppm variants. Consider the -40°C to +85°C range for general consumer electronics rather than extreme industrial environments requiring wider thermal stability.

Part Context

This part belongs to the QT3C series of thin-wafer quartz crystals from QST. The series provides various tolerance options denoted by suffix letters, with 'B' indicating the ±50 ppm grade. These components are widely used as clock sources in battery-operated devices due to their low power consumption and small form factor.

Replacement Considerations

Direct substitutes include other manufacturers' 32.768 kHz crystals with identical 3.0 x 1.5 mm packages and 7 pF load capacitance. Verify that alternative parts match the ±50 ppm tolerance and -40°C to +85°C operating range to ensure functional equivalence without circuit modification.