QT325S-25.000MEHQ-T

Overview

QT325S-25.000MEHQ-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 25 MHz and utilizes a 3.2mm x 2.5mm SMD package. The component features a frequency stability of ±10 ppm at 25°C and ±30 ppm over the temperature range of -40°C to +85°C. It is specified with a load capacitance of 18 pF and a maximum series resistance of 50 Ohms. The device employs a glass seal construction and complies with RoHS standards.

Feature Summary

• Glass-sealed quartz crystal construction for enhanced environmental durability
• High frequency stability suitable for precision timing requirements
• Surface-mount design optimized for automated assembly processes

Applications

• Embedded communication systems requiring stable clock sources
• Microcontroller unit (MCU) clock generation
• Industrial control equipment timing circuits

Procurement Notes

Verify the specific manufacturer designation on the datasheet, as some listings associate this part number with TXC Corporation while others identify QST as the source. Confirm that the 18 pF load capacitance matches your circuit design requirements before procurement. Ensure the ±10 ppm stability at 25°C meets your system's tolerance needs. Check for RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component when a 25 MHz reference is needed in a compact 3225 footprint. The ±10 ppm stability is appropriate for high-speed data interfaces like Gigabit Ethernet or precise ADC sampling. Consider the 18 pF load capacitance to ensure proper oscillation with your host circuit. Evaluate the -40°C to +85°C operating range against your environmental conditions.

Part Context

This model belongs to the QT325S series of MHz quartz crystals. These components are widely used in consumer electronics and industrial boards where space efficiency is critical. The 3225 package size offers a balance between performance and board real estate, replacing larger through-hole alternatives in modern designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with equivalent models from other manufacturers based on frequency, package dimensions, and electrical parameters.