QT325S-16.000MEIE-T

Overview

The QT325S-16.000MEIE-T is a surface-mount quartz crystal manufactured by QST, designed for precise frequency generation in electronic circuits. It operates at a nominal frequency of 16 MHz with a tolerance of ±10 ppm at 25°C and ±20 ppm over the temperature range of -40°C to +85°C. The component features a load capacitance of 12 pF and an equivalent series resistance (ESR) of 50 Ohms maximum. It utilizes a compact 4-SMD, no lead package with dimensions of 3.2 mm x 2.5 mm x 0.7 mm, suitable for automated assembly processes.

Feature Summary

• Compact 3.2mm x 2.5mm SMD footprint optimized for space-constrained designs
• High frequency stability with ±10 ppm tolerance at room temperature
• Low equivalent series resistance for efficient circuit integration
• Wide operating temperature range supporting industrial applications

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics timing circuits
• Industrial control system oscillators

Procurement Notes

Verify the specific suffix MEIE-T against official QST documentation to confirm the exact frequency tolerance and temperature range specifications. Ensure compatibility with the target circuit's load capacitance requirements, specifically the 12 pF specification. Confirm that the 50 Ohm ESR limit aligns with the oscillator design parameters before finalizing procurement decisions.

Selection Notes

Select this component when a small form factor is required alongside high precision timing. The 16 MHz frequency is standard for many microcontrollers. Consider the ±20 ppm wide temperature stability if the application operates in varying environmental conditions. Compare the 12 pF load capacitance requirement against the host oscillator circuit design to ensure proper frequency accuracy.

Part Context

This part belongs to the QT325S series from QST, which offers various frequency and tolerance options within a standardized 3.2x2.5mm package. The series provides different suffixes to denote specific performance characteristics such as temperature range and frequency stability, allowing designers to choose the appropriate variant for their specific electrical and environmental needs.

Replacement Considerations

Direct substitutes include other 16 MHz crystals in 3225 packages with similar 12 pF load capacitance and ±10/±20 ppm stability. Verify pinout compatibility and mechanical height constraints. Check manufacturer datasheets for equivalent parts from other suppliers offering identical electrical parameters and package dimensions.