QT325S-12.288MAHJ-T

Overview

The QT325S-12.288MAHJ-T is a quartz crystal resonator manufactured by QST, operating at a fundamental frequency of 12.288 MHz. It features a load capacitance of 18 pF and a maximum equivalent series resistance (ESR) of 50 Ohms. The component exhibits a frequency tolerance and stability of ±30 ppm at 25°C, with extended stability of ±30 ppm across the industrial temperature range of -40°C to +85°C. It utilizes a 4-SMD, no lead package configuration with dimensions of 3.2 mm x 2.5 mm.

Feature Summary

• Seam-sealed construction for environmental protection
• Industrial temperature range operation from -40°C to +85°C
• Surface-mount design for automated assembly

Applications

• Microcontroller clock sources
• Communication module timing references
• Embedded system oscillators

Procurement Notes

Verify the specific manufacturer designation on the datasheet, as similar part numbers may be associated with different suppliers such as TXC Corporation. Confirm that the 50 Ohm ESR specification aligns with circuit requirements. Ensure the 18 pF load capacitance matches the oscillator circuit design parameters before procurement.

Selection Notes

Select this component when a 12.288 MHz fundamental frequency is required for baud rate generation or precise timing applications. The ±30 ppm stability is suitable for standard communication interfaces. Consider the 3.2x2.5 mm footprint constraints during PCB layout and verify compatibility with reflow soldering profiles specified in the official documentation.

Part Context

This part belongs to the QT325S series of surface-mount crystals. These components are designed for compact electronic devices requiring reliable frequency control. The series typically offers various frequency options within the same mechanical footprint, allowing for standardized board designs across different product variants.

Replacement Considerations

The QT325S-12.288MAHQ-T and QT325S-12.288MAHV-T are documented substitutes within the same series. Verify pinout and electrical specifications against the original datasheet before substitution.