QT252S-27.000MAHQ-T

Overview

The QT252S-27.000MAHQ-T is a surface-mount quartz crystal resonator manufactured by QST. It operates at a nominal frequency of 27 MHz with a fundamental mode oscillation. The component features a compact SMD body dimension of 2.5x2x0.55 mm and utilizes a load capacitance of 10 pF. Frequency stability and tolerance are specified at ±30 ppm. The equivalent series resistance (ESR) is rated at 100 Ohms, ensuring reliable performance in precision timing circuits.

Feature Summary

• Fundamental mode quartz crystal operation for stable signal generation
• Compact surface-mount package design suitable for space-constrained PCB layouts
• Defined load capacitance and ESR characteristics for circuit integration

Applications

• Precision timing applications requiring stable clock signals
• Electronic devices utilizing 27 MHz reference frequencies
• Surface-mount assembly processes for consumer electronics

Procurement Notes

Verify the manufacturer designation carefully, as the QT252S series appears across multiple vendors including TXC Corporation and QST. Ensure the specific suffix HQ-T matches the required stability and package specifications. Confirm that the 10 pF load capacitance aligns with your oscillator circuit design requirements before finalizing procurement orders to avoid compatibility issues.

Selection Notes

Select this component when a 27 MHz fundamental mode crystal is required with ±30 ppm stability. The 2.5x2 mm footprint offers a balance between size and electrical performance. Consider the 100 Ohm ESR value for impedance matching within the host oscillator circuit. This part is designed for surface-mount technology, facilitating automated assembly in modern manufacturing environments.

Part Context

This component belongs to the QT252S series of surface-mount quartz crystals. Similar variants exist with different frequencies such as 26 MHz or 27.12 MHz, and varying stability ratings. The series generally maintains consistent physical dimensions and mounting styles, allowing for potential form-factor compatibility across different frequency options within the same product family.

Replacement Considerations

Direct substitutes include other 27 MHz SMD crystals with identical 2.5x2 mm footprints and ±30 ppm stability. Verify that replacement parts support the same 10 pF load capacitance and fundamental mode operation. Cross-reference ESR values to ensure circuit oscillation reliability is maintained during component substitution.