QT325S-50.000MAHE-T

Overview

The QT325S-50.000MAHE-T is a surface-mount quartz crystal resonator manufactured by QST, designed for MHz frequency applications. It features a 3.2x2.5mm body size with a glass seal construction and operates at a nominal frequency of 50MHz. The component exhibits a frequency stability and tolerance of ±30ppm at 25°C and ±30ppm across the -40 to 85°C temperature range. It utilizes a 12pF load capacitance and has an equivalent series resistance (ESR) of 50 Ohms. The device is housed in a 4-SMD, no lead package.

Feature Summary

• Glass sealed quartz crystal construction for enhanced environmental stability
• Compact 3.2x2.5mm surface mount footprint suitable for space-constrained designs
• Wide operating temperature range from -40°C to 85°C with consistent frequency performance

Applications

• General purpose clock generation for digital circuits
• Microcontroller system timing references
• Communication module oscillator circuits

Procurement Notes

Verify the manufacturer designation carefully as sources may list either QST or TXC Corporation for this part number. Confirm the specific ESR value of 50 Ohms against your circuit requirements, as some listings suggest different values. Ensure the 3.2x2.5mm package dimensions match your PCB land pattern. Cross-reference the ±30ppm stability specification to guarantee compatibility with your system's timing accuracy needs before finalizing procurement.

Selection Notes

Select this component when a 50MHz reference signal is required within a compact SMD form factor. The ±30ppm stability is suitable for standard asynchronous communication protocols and general logic timing where high precision is not critical. Consider the 50 Ohm ESR to ensure proper oscillation startup conditions in your chosen circuit topology. The glass seal offers reliability advantages over ceramic packages in varying thermal environments.

Part Context

This part belongs to the QT325S series of seam-seal quartz crystals, characterized by their small 3.2x2.5mm dimensions. The series typically includes various frequencies such as 10MHz, 25MHz, and 27.12MHz, all sharing similar electrical characteristics like 12pF load capacitance. The 'MAHE' suffix generally indicates the specific frequency, tolerance, and packaging configuration within the product line.

Replacement Considerations

Direct substitutes include other 50MHz crystals in the same 3.2x2.5mm package with matching ±30ppm stability and 12pF load capacitance. Verify that alternative components maintain the 50 Ohm ESR specification to prevent oscillation failure. Manufacturers such as TXC Corporation produce compatible parts within this series family.