QT325S-26.000MEIC-T

Overview

The QT325S-26.000MEIC-T is a surface-mount crystal oscillator manufactured by QST, designed for precision timing applications. It operates at a nominal frequency of 26 MHz with a load capacitance of 10 pF and an equivalent series resistance (ESR) of 80 Ohms. The component features a compact 4-SMD, No Lead package with dimensions of 3.2 x 2.5 x 0.7 mm. Frequency stability is rated at ±10 ppm at 25°C and ±20 ppm across the operating temperature range of -40°C to +85°C.

Feature Summary

• Compact 3.2x2.5mm SMD footprint suitable for space-constrained designs
• High frequency stability with ±10 ppm tolerance at room temperature
• Wide operating temperature range from -40°C to +85°C
• Low equivalent series resistance for efficient circuit integration

Applications

• Wireless networking modules requiring precise clock signals
• Embedded systems utilizing microcontrollers or processors
• Consumer electronics with strict size limitations
• Industrial control equipment needing reliable timing sources

Procurement Notes

Verify the specific suffix 'IC' against official QST documentation to confirm the exact temperature stability specifications (-40°C to +85°C, ±20 ppm). Ensure that the 10pF load capacitance matches the target circuit design requirements. Cross-reference the package dimensions (3.2x2.5x0.7mm) with PCB footprint libraries to prevent assembly errors during manufacturing.

Selection Notes

Select this component when a small form factor is critical alongside high frequency accuracy. The 26 MHz output is suitable for various digital interfaces. Consider the ESR value of 80 Ohms for oscillator circuit compatibility. Evaluate the thermal performance if the application involves significant self-heating or extreme environmental conditions beyond standard industrial ranges.

Part Context

This part belongs to the QT325S series of surface-mount crystals from QST. The series offers various frequency options and stability grades, identified by alphanumeric suffixes. The 'QT325S' designation indicates the physical package style, while the numerical values denote the frequency and electrical characteristics. This specific model represents a balance between size, cost, and performance for general-purpose timing needs.

Replacement Considerations

Direct substitutes include other 26 MHz crystals in 3225 packages with similar electrical parameters. Verify that alternative parts match the 10pF load capacitance and 80 Ohm ESR. Check if competitor components offer comparable temperature stability over the -40°C to +85°C range to ensure functional equivalence in existing designs.