QT49S-26.000MAHJ-T

Overview

The QT49S-26.000MAHJ-T is a surface-mount crystal oscillator operating at a fundamental frequency of 26 MHz. It features a load capacitance of 18 pF and an equivalent series resistance of 30 Ohms. The component exhibits frequency stability and tolerance of ±30 ppm. Designed for SMD mounting, it utilizes the HC-49/US form factor with body dimensions of 12.7 x 4.8 x 3.8 mm. The unit supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Surface-mount construction utilizing HC-49/US package geometry
• Fundamental mode operation at 26 MHz
• Standard 18 pF load capacitance specification
• Wide industrial temperature operational capability

Applications

• Microcontroller clock generation circuits
• Communication module timing references
• Digital signal processing systems
• Consumer electronics timing control

Procurement Notes

Verify the specific suffix codes against manufacturer documentation to confirm exact electrical tolerances and packaging configurations. Ensure compatibility with reflow soldering profiles specified in the official datasheet. Cross-reference the part number with authorized distributors to confirm current availability and authenticity before finalizing procurement orders.

Selection Notes

Select this component when a 26 MHz surface-mount crystal with ±30 ppm stability is required. Confirm that the circuit design accommodates the 18 pF load capacitance and 30 Ohm ESR. Verify that the operating environment remains within the -40°C to +85°C range. Ensure PCB layout guidelines for HC-49/SMD packages are followed to maintain frequency accuracy.

Part Context

This part belongs to the QT49S series of surface-mount crystals from QST. The series offers various frequencies including 16 MHz, 24 MHz, and 27 MHz variants. These components share common package dimensions and electrical characteristics, differing primarily in resonant frequency and specific tolerance grades defined by their unique model suffixes.

Replacement Considerations

Direct substitutes include other 26 MHz SMD crystals with matching 18 pF load capacitance and ±30 ppm stability. Compatible alternatives must support the HC-49/US footprint and similar ESR values. Verify thermal specifications and frequency stability requirements match the original design constraints before substitution.