QT325S-32.768MAHE-T

Overview

The QST QT325S-32.768MAHE-T is a surface-mount quartz crystal oscillator operating at a fundamental frequency of 32.768 MHz. It features a 4-SMD, No Lead package with dimensions of 3.2x2.5 mm and a height of 0.7 mm. The component exhibits a frequency tolerance of ±30 ppm across an operating temperature range of -40°C to +85°C. It utilizes a load capacitance of 12 pF and has an equivalent series resistance (ESR) of 50 Ohms maximum.

Feature Summary

• Seam-sealed ceramic construction for environmental stability
• Fundamental mode operation for precise timing applications
• Surface mount design compatible with automated assembly processes

Applications

• Real-time clock circuits in consumer electronics
• Microcontroller system clocks
• Wearable device timing references
• Low-power embedded systems

Procurement Notes

Verify the specific suffix HE-T against official QST documentation to confirm the exact temperature stability and load capacitance specifications. Ensure compatibility with reflow soldering profiles defined in the manufacturer's datasheet. Confirm RoHS compliance status through current regulatory declarations before integration into final products.

Selection Notes

Select this component when a 32.768 MHz reference is required for low-frequency timing applications. The 12 pF load capacitance must match the oscillator circuit requirements. Consider the ±30 ppm tolerance if higher precision is needed, as other variants offer tighter tolerances. Verify the 4-SMD footprint fits the PCB layout constraints.

Part Context

This part belongs to the QT325S series of thin-mode quartz crystals designed for compact electronic devices. The series offers various frequency and tolerance options within a standardized 3.2x2.5 mm package. It serves as a standard timing element for RTC and low-speed clock applications where size and power consumption are critical factors.

Replacement Considerations

Direct substitutes include parts from the same QT325S family with matching electrical parameters. Cross-manufacturer replacements require verification of pinout, package dimensions, and electrical characteristics such as ESR and load capacitance to ensure circuit compatibility.