QT325G-27.000MAHQ-T

Overview

The QT325G-27.000MAHQ-T is a 27 MHz crystal oscillator manufactured by QST, designed for surface-mount applications. It operates within a temperature range of -40°C to +85°C and features a load capacitance of 10 pF. The component exhibits a frequency tolerance and stability of ±30 ppm across the specified operating range, with an equivalent series resistance (ESR) of 60 Ω. Packaged in a compact SMD form factor, it meets RoHS standards and is suitable for automotive-grade environments requiring AEC-Q200 certification.

Feature Summary

• Automotive-grade reliability certified under AEC-Q200 standards
• Wide operating temperature range from -40°C to +85°C
• Compact surface-mount design for space-constrained PCB layouts

Applications

• Automotive infotainment systems
• On-board diagnostic modules
• Telematics control units

Procurement Notes

Verify that the specific part number includes the HQ suffix to ensure compliance with the required 10 pF load capacitance and ±30 ppm stability specifications. Confirm AEC-Q200 certification status directly with the manufacturer or authorized distributors prior to procurement. Ensure compatibility with the target circuit's load capacitance requirements to maintain accurate frequency performance.

Selection Notes

Select this component when a 27 MHz reference clock is required for automotive electronics operating in extreme temperatures. The 10 pF load capacitance must match the host microcontroller or transceiver input specifications. Consider the 60 Ω ESR value for oscillator circuit design to ensure reliable startup and stable operation without excessive power consumption.

Part Context

This crystal belongs to the QT325G series, which provides standardized surface-mount solutions for high-reliability applications. The series supports various frequencies and tolerances, with the HQ variant specifically optimized for automotive use cases demanding strict frequency stability over wide thermal ranges.

Replacement Considerations

QT325G-27.000MAHJ-T offers similar characteristics but utilizes an 18 pF load capacitance instead of 10 pF. Verify circuit compatibility before substitution as the differing load capacitance may affect frequency accuracy.