QT252S-12.000MEHK-T

Overview

The QT252S-12.000MEHK-T is a surface-mount quartz crystal oscillator manufactured by QST. It operates at a fundamental frequency of 12.000 MHz and utilizes a seam seal package with dimensions of 2.50mm x 2.00mm. The component features four solder pads for mounting on printed circuit boards. It offers a frequency tolerance of ±30ppm at 25°C and maintains stability within ±30ppm across the industrial temperature range of -40°C to +85°C. The load capacitance is specified as 12pF, ensuring compatibility with standard microcontroller clock inputs.

Feature Summary

• Seam sealed construction provides environmental protection for the quartz resonator element
• Compact surface mount footprint suitable for space-constrained electronic designs
• Wide operating temperature range supports reliable performance in industrial environments

Applications

• Microcontroller clock sources
• Communication module timing references
• Industrial control system oscillators

Procurement Notes

Verify the specific suffix MEHK against official QST documentation to confirm exact tolerance and temperature specifications. Ensure the ordering part number matches the required load capacitance and frequency stability for your design. Check current availability status through authorized distributors as supply levels may vary. Confirm RoHS compliance requirements if applicable to your manufacturing standards.

Selection Notes

Select this component when a 12MHz reference signal is required in a small form factor. Consider the ±30ppm tolerance limit against your system's jitter budget. Verify that the 12pF load capacitance matches the MCU or oscillator circuit input requirements. Evaluate the seam seal package benefits over ceramic packages for improved moisture resistance.

Part Context

This part belongs to the QT252S series of surface mount crystals from QST. The series includes various frequencies and tolerance grades. Similar parts in the lineup differ primarily in frequency values, tolerance percentages, and temperature ranges. The 2.5x2.0mm package size is common for high-density PCB layouts.

Replacement Considerations

Direct substitutes must match the 12MHz frequency, 2.5x2.0mm package, and 12pF load capacitance. Verify equivalent tolerance and temperature range specifications before substitution. Cross-reference with other manufacturers offering similar seam seal crystals.