QT325S-20.000MEIC-T

Overview

The QST QT325S-20.000MEIC-T is a 20 MHz fundamental mode quartz crystal resonator housed in a compact 4-SMD, No Lead package with dimensions of 3.2mm x 2.5mm. It features a load capacitance of 9pF and an equivalent series resistance (ESR) of 50 Ohms. The component exhibits a frequency stability of ±10ppm at 25°C and ±20ppm over the operating temperature range of -40°C to +85°C. This surface-mount device is designed for precise timing applications requiring stable oscillation within tight tolerance limits.

Feature Summary

• Compact 3.2mm x 2.5mm surface-mount footprint suitable for space-constrained designs
• High frequency stability with ±10ppm accuracy at room temperature
• Low equivalent series resistance for efficient circuit integration
• Wide operating temperature range ensuring reliability in varied environments

Applications

• Embedded communication systems requiring precise clock signals
• Microcontroller unit (MCU) clock sources
• Portable electronic devices with limited board space
• Industrial control equipment operating in variable temperatures

Procurement Notes

Verify the specific suffix 'IC' against official QST documentation to confirm the exact load capacitance and stability specifications, as suffixes often denote critical electrical variations. Ensure the requested quantity matches the manufacturer's standard packaging configuration. Cross-reference the date code and lot number to confirm compliance with current RoHS and REACH directives. Confirm that the 9pF load capacitance aligns with your oscillator circuit design requirements before finalizing the order.

Selection Notes

Select this component when a small SMD crystal with 20MHz frequency and 9pF load capacitance is required. The ±10ppm stability at 25°C makes it suitable for applications demanding high precision. Consider the 50 Ohm ESR value for oscillator compatibility. The wide temperature range supports operation in harsh industrial or outdoor environments where thermal stability is critical for maintaining signal integrity.

Part Context

This part belongs to the QST QT325S series of thin-film bulk acoustic resonator (FBAR) or similar advanced quartz crystals designed for high-frequency performance in miniature packages. The series offers various frequency options and stability grades, with the MEIC suffix indicating specific electrical characteristics tailored for modern consumer and industrial electronics.

Replacement Considerations

Direct substitutes must match the 20MHz frequency, 9pF load capacitance, 3.2x2.5mm package, and ±10ppm/±20ppm stability. Verify ESR compatibility. Common alternatives include parts from TXC or Abracon with identical suffix codes, but always validate pinout and electrical parameters against the original datasheet.