QT252G-27.000MAHE-T

Overview

The QT252G-27.000MAHE-T is a quartz crystal resonator manufactured by QST Corporation, designed for precise timing applications. It operates at a nominal frequency of 27.000 MHz and utilizes a glass-sealed package with dimensions of 2.5 x 2.0 mm. The component features four pads and is constructed using ceramic materials to ensure durability. It offers a frequency stability of ±30 ppm at 25°C and maintains the same tolerance across an extended temperature range of -40°C to +85°C. The device is specified with a load capacitance of 12 pF, making it suitable for integration into various electronic circuits requiring stable clock signals.

Feature Summary

• Glass-sealed construction provides environmental protection and long-term reliability
• Compact 2.5 x 2.0 mm footprint supports space-constrained circuit designs
• Stable frequency performance maintained across wide industrial temperature ranges

Applications

• Clock signal generation in microcontroller systems
• Timing references for communication interfaces
• Frequency control in consumer electronics devices

Procurement Notes

Verify that the specific part number matches the required frequency and package type before ordering. Confirm that the supplier provides documentation confirming the ±30 ppm stability specification over the full operating temperature range. Ensure compatibility with the target circuit's load capacitance requirements. Check for RoHS compliance status if environmental regulations apply to your project. Validate that the glass-seal technology meets the environmental exposure conditions of the intended application.

Selection Notes

Select this component when a compact quartz resonator with high thermal stability is required. The 27.000 MHz frequency is suitable for standard digital timing needs. Consider the 12 pF load capacitance requirement when designing the oscillator circuit. The glass-sealed package offers advantages over unsealed alternatives in harsh environments. Evaluate the ±30 ppm tolerance against system jitter requirements.

Part Context

This component belongs to QST's line of surface-mount quartz crystals. It shares the 2.5 x 2.0 mm form factor with other models in the series but differs in frequency and stability specifications. The 'G' suffix typically indicates the ±50 ppm tolerance variant in some QST nomenclatures, but datasheet verification is essential as suffixes can vary. It is distinct from oscillators, providing only the passive resonant element.

Replacement Considerations

Direct substitutes must match the 27.000 MHz frequency, 2.5 x 2.0 mm package, and 12 pF load capacitance. Verify that alternative manufacturers offer equivalent ±30 ppm stability over the -40°C to +85°C range. Ensure the replacement uses compatible electrode structures and sealing methods to maintain electrical characteristics.