QT325G-8.000MAHE-T

Overview

The QT325G-8.000MAHE-T is a passive crystal resonator manufactured by QST Corporation, designed for surface-mount applications. It operates at a fundamental frequency of 8 MHz with a standard load capacitance of 12 pF. The component provides high frequency stability, maintaining a tolerance of ±30 ppm at 25°C and across the operating temperature range. It features an equivalent series resistance (ESR) of 60 Ω and is housed in a compact 4-SMD, no-lead package measuring 3.2 x 2.5 mm. The device is rated for operation between -40°C and +85°C, ensuring reliability in various electronic environments.

Feature Summary

• Compact 3.2x2.5 mm surface-mount footprint suitable for space-constrained designs
• High frequency stability with ±30 ppm tolerance across specified temperature ranges
• Lead-free construction compliant with RoHS standards for environmental safety

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics oscillator circuits

Procurement Notes

Verify the complete part number against official QST documentation to ensure correct suffix alignment, as variations may indicate different packaging or specific testing criteria. Confirm that the supplier provides valid RoHS compliance certificates and material declarations. Cross-reference the manufacturer's latest datasheet to validate the load capacitance and ESR specifications required for your specific circuit design before finalizing procurement orders.

Selection Notes

Select this component when a stable 8 MHz reference is required in a small form factor. Ensure the host oscillator circuit is designed for a 12 pF load capacitance to achieve the specified ±30 ppm accuracy. Verify that the operating environment remains within the -40°C to +85°C range. Consider the 60 Ω ESR value when calculating drive levels to prevent overdriving the crystal, which could affect longevity and frequency stability.

Part Context

This part belongs to the QT325G series of thin-film bulk acoustic resonators (FBAR) or similar advanced crystal technologies from QST, optimized for high-frequency performance in compact packages. The series is widely used in portable devices where size and power efficiency are critical. The 'MAHE' suffix typically denotes specific frequency, load capacitance, and packaging details unique to this variant within the broader product line.

Replacement Considerations

Direct replacements must match the 8 MHz frequency, 12 pF load capacitance, and 3.2x2.5 mm package dimensions. Check equivalent parts from other manufacturers such as ECS or NDK that offer similar ±30 ppm stability and SMD configurations. Ensure any substitute component supports the same operating temperature range and has comparable ESR characteristics to maintain circuit performance.