QT325S-16.6670MAHE-T

Overview

The QT325S-16.6670MAHE-T is a surface-mount quartz crystal oscillator manufactured by QST. It operates at a fundamental frequency of 16.667 MHz with a load capacitance of 12 pF. The component features an equivalent series resistance (ESR) of 150 Ohms and utilizes a glass-sealed package measuring 3.2 x 2.5 x 0.7 mm. Frequency stability and tolerance are both specified at ±30 ppm within the -40°C to +85°C temperature range. The device is RoHS compliant and lead-free, designed for high-reliability applications requiring precise timing signals in compact electronic assemblies.

Feature Summary

• Glass-sealed construction for enhanced environmental protection
• Surface-mount design for automated assembly integration
• Wide operating temperature range supporting harsh conditions

Applications

• High-power motor control cabinets
• Precision timing circuits in embedded systems
• Communication equipment clock sources

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging if required for your manufacturing process. Confirm that the ±30 ppm stability meets your system's jitter and phase noise requirements. Ensure the 12 pF load capacitance matches your circuit design. Check RoHS compliance documentation for regulatory adherence. Validate the 150 Ohm ESR against your oscillator circuit specifications.

Selection Notes

Select this component when a 16.667 MHz reference is required in a small SMD footprint. Consider the ±30 ppm stability sufficient for general-purpose timing rather than high-precision navigation. The glass seal offers better humidity resistance than epoxy packages. Compare ESR values with other crystals if driving current limits are critical. Verify availability of the specific temperature grade H (-40 to +85°C).

Part Context

This part belongs to the QT325S family of quartz crystals from QST. The family includes various frequencies and stability grades. Similar parts include QT325S-32.000MAHE-T for 32 MHz operation. The model number encodes frequency, stability, and package type. This specific variant targets industrial applications needing reliable performance across wide temperature ranges.

Replacement Considerations

Direct substitutes may include other manufacturers' 16.667 MHz crystals in 3225 packages. Verify pin compatibility and electrical parameters before substitution. Generic replacements must match the 12 pF load capacitance and 150 Ohm ESR. Ensure the replacement also offers ±30 ppm stability over the same temperature range.