QTM325-25.000MCE-T

Overview

The QTM325-25.000MCE-T is a surface-mount crystal oscillator (XO) manufactured by QST, designed for precision timing applications. It operates at a nominal frequency of 25 MHz with a frequency stability of ±50 ppm. The device utilizes CMOS output logic and requires a supply voltage of 2.5V. It is housed in a compact 4-SMD, no-lead package with dimensions of 3.2mm x 2.5mm. The component supports an operating temperature range of -40°C to +85°C, ensuring reliable performance across various industrial and commercial environments.

Feature Summary

• Provides stable 25 MHz clock signals with ±50 ppm frequency stability for precision timing requirements.
• Features CMOS output interface compatible with standard digital logic circuits.
• Designed for surface-mount assembly using a compact 3.2mm x 2.5mm no-lead package.

Applications

• Precision timing circuits requiring stable clock references
• Embedded systems utilizing CMOS logic interfaces
• Industrial equipment operating within extended temperature ranges

Procurement Notes

Verify the specific suffix MCE-T against official QST documentation to confirm the 2.5V supply voltage requirement, as other variants in the QTM325 series may utilize different voltages such as 3.3V. Ensure the requested quantity matches the manufacturer's standard tape-and-reel packaging specifications. Confirm that the ±50 ppm stability rating aligns with the system's jitter and phase noise tolerances before finalizing procurement orders.

Selection Notes

Select this component when a 25 MHz CMOS clock source is required with moderate frequency stability. The 2.5V supply voltage distinguishes it from 3.3V variants like the QTM325-25.000MBD-T. Consider the 3.2x2.5mm footprint for space-constrained PCB layouts. Verify compatibility with the target system's power domain and signal integrity requirements before implementation.

Part Context

This part belongs to the QST QTM325 series of surface-mount crystal oscillators. The series offers various frequencies and stability options. The MCE-T suffix indicates specific electrical characteristics including the 2.5V supply and ±50 ppm stability, differentiating it from other suffixes like BBD or BEE which may offer tighter stability or different voltage levels.

Replacement Considerations

Direct substitutes include other QST parts with identical pinout and electrical specs, such as the QTM325-25.000MCE-T from alternative distributors. Cross-brand replacements require verification of CMOS output voltage levels, current consumption, and package dimensions to ensure mechanical and electrical compatibility.