QT325G-14.31818MAHE-T

Overview

The QST QT325G-14.31818MAHE-T is a surface-mount quartz crystal resonator designed for precision timing applications. It operates at a fundamental frequency of 14.31818 MHz with a frequency tolerance of ±30 ppm over the operating temperature range of -20°C to +70°C. The component features a load capacitance of 12 pF and an equivalent series resistance (ESR) of 100 Ohms maximum. It utilizes a 4-SMD, no lead package with dimensions of 3.2 mm x 2.5 mm x 0.8 mm. The device is RoHS compliant and suitable for standard Pierce oscillator configurations.

Feature Summary

• Surface-mount design with compact 3.2x2.5mm footprint
• Stable frequency performance within ±30 ppm tolerance
• Low equivalent series resistance for efficient oscillation
• RoHS compliant construction for environmental safety

Applications

• Microcontroller clock sources
• Communication interface timing circuits
• Embedded system oscillators
• Digital signal processing hardware

Procurement Notes

Verify the complete part number including suffixes against official QST documentation to ensure correct frequency, tolerance, and packaging specifications. Confirm that the intended application environment falls within the specified -20°C to +70°C operating range. Check for RoHS compliance requirements in your supply chain. Ensure compatibility with the target PCB layout for 4-SMD no-lead packages. Validate load capacitance requirements with the host oscillator circuit design.

Selection Notes

Select this component when a 14.31818 MHz reference is required for microcontroller or digital logic timing. The ±30 ppm tolerance suits general-purpose applications where high precision is not critical. Consider the 12 pF load capacitance for matching with the host circuit's input capacitance. Evaluate the 100 Ohm ESR limit against the oscillator driver strength. Compare against alternative tolerances if tighter stability is needed for the specific operational temperature range.

Part Context

This part belongs to the QST QT325G series of surface-mount crystals. The series offers various frequency options and tolerance grades defined by suffix codes. Similar parts in the family may differ in temperature range, frequency tolerance, or physical dimensions. The QT325G designation indicates a specific size and form factor common in modern electronics manufacturing.

Replacement Considerations

Cross-reference tools suggest parametrically similar parts from other manufacturers. Verify that any substitute matches the 14.31818 MHz frequency, 12 pF load capacitance, and 100 Ohm ESR. Ensure the replacement supports the same 4-SMD no-lead package and meets the ±30 ppm tolerance requirement. Check for identical operating temperature ranges.