QT325S-12.000MAHE-T

Overview

The QT325S-12.000MAHE-T is a surface-mount quartz crystal oscillator manufactured by QST, part of the QT325S series. It features a 3.2mm x 2.5mm SMD package with four pads and no lead construction. The device operates at a nominal frequency of 12 MHz with a load capacitance of 12 pF. Frequency stability is specified at ±30 ppm at 25°C and ±30 ppm over the temperature range of -40°C to +85°C. The unit utilizes a glass seal technology for environmental protection and includes an equivalent series resistance (ESR) of 150 Ohms.

Feature Summary

• Utilizes glass seal technology for enhanced environmental durability
• Features a compact 3.2mm x 2.5mm surface-mount footprint
• Provides stable frequency output with defined thermal stability ranges

Applications

• Digital signal processing controller clock sources
• Motor control system timing references
• Embedded real-time task synchronization circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the received part matches the specific suffix 'HE' which denotes the required ±30 ppm stability across the extended industrial temperature range of -40°C to +85°C. Ensure storage conditions comply with moisture sensitivity levels prior to reflow soldering to maintain performance integrity.

Selection Notes

Select this component when a 12 MHz reference is required in space-constrained designs utilizing the standard 3.2x2.5 mm footprint. The ±30 ppm stability specification suits general-purpose digital logic and communication interfaces where moderate precision is sufficient. Consider alternative suffixes if stricter frequency tolerance or different operating temperature ranges are mandated by the system design requirements.

Part Context

This model belongs to the QT325S family of quartz crystals, characterized by their small form factor and reliability. Variants within this series differ primarily in frequency, load capacitance, and stability codes. The 'HE' suffix specifically identifies the electrical characteristics regarding temperature drift and initial accuracy, distinguishing it from other commercial or automotive grade options in the same physical package.

Replacement Considerations

Compatible substitutes include the QT325S-12.000MAHJ-T and QT325S-12.000MAHK-T, provided the application can accommodate differences in load capacitance or stability specifications. Verify pin compatibility and mounting dimensions before substitution to ensure mechanical fit within the existing PCB layout.