QT325S-26.000MAHJ-T

Overview

The QT325S-26.000MAHJ-T is a 26 MHz quartz crystal oscillator manufactured by QST, designed for surface-mount applications. It features a 4-SMD, No Lead package with dimensions of 3.2mm x 2.5mm x 0.7mm. The component operates within a frequency stability of ±30 ppm at both 25°C and the extended temperature range of -40°C to 85°C. It utilizes a load capacitance of 18 pF and an equivalent series resistance (ESR) of 50 Ohms. The device employs a glass seal construction to ensure environmental durability and long-term frequency stability in electronic circuits.

Feature Summary

• Surface-mount design with no lead configuration for automated assembly
• Glass seal construction for enhanced environmental protection
• Stable frequency performance across industrial temperature ranges

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics oscillators

Procurement Notes

Verify the manufacturer part number QT325S-26.000MAHJ-T against official QST documentation to confirm specifications. Ensure compatibility with 18 pF load capacitance requirements in the target circuit design. Check for RoHS compliance and SVHC status as indicated in current regulatory filings. Confirm package dimensions match PCB footprint constraints before procurement.

Selection Notes

Select this component when a compact 26 MHz crystal with ±30 ppm stability is required for space-constrained designs. The 4-SMD no-lead package suits high-volume surface-mount manufacturing processes. Consider the 50 Ohm ESR limit when designing matching networks. Verify that the operating temperature range of -40°C to 85°C meets the application's thermal environment requirements.

Part Context

This part belongs to the QT325S series of quartz crystals from QST, characterized by small form factor and reliability. The series supports various frequencies with consistent package dimensions. The specific model provides a standard 26 MHz output suitable for general-purpose timing applications requiring moderate stability.

Replacement Considerations

Direct substitutes include other manufacturers' 26 MHz crystals in 3.2x2.5mm SMD packages with identical electrical parameters. Verify pinout compatibility and load capacitance values when cross-referencing alternative brands.