QT325S-40.000MEEQ-T

Overview

The QST QT325S-40.000MEEQ-T is a surface-mount quartz crystal resonator manufactured by TXC Corporation, operating at a nominal frequency of 40 MHz. It utilizes a fundamental parallel resonance mode and is housed in a compact 3215 (3.2mm x 1.5mm) SMD package. The component features a load capacitance of 18 pF and offers a frequency tolerance of ±20 ppm at 25°C, with stability maintained within ±20 ppm across the commercial temperature range of -20°C to +70°C. Designed for high reliability, it employs a seam-seal construction that provides hermetic sealing against environmental contaminants. The device is supplied in tape-and-reel packaging to facilitate automated assembly processes.

Feature Summary

• Hermetic seam-seal construction ensures long-term frequency stability and protection against moisture ingress
• Fundamental parallel resonance operation optimized for standard load capacitance requirements
• Compact 3215 surface-mount footprint designed for space-constrained PCB layouts
• Compliant with RoHS directives for environmentally safe manufacturing

Applications

• Clock signal generation for microcontrollers and digital logic circuits
• Timing references for communication modules and data transmission interfaces
• Frequency control in consumer electronics and portable devices
• Oscillator circuits requiring stable commercial-grade timing sources

Procurement Notes

Verify the manufacturer designation as TXC Corporation when sourcing this component. Confirm the specific suffix MEEQ-T corresponds to the required load capacitance and tolerance specifications. Ensure the procurement channel provides valid traceability documentation. Check for RoHS compliance status if required by project regulations. Validate the reel quantity against production needs before finalizing orders.

Selection Notes

Select this component when a 40 MHz reference is required in a minimal 3215 package size. Consider the ±20 ppm tolerance limits for application timing accuracy requirements. Evaluate the commercial temperature range suitability against the operational environment. Verify compatibility with the target circuit's load capacitance configuration. Assess the seam-seal technology benefits for long-term reliability in harsh conditions.

Part Context

This part belongs to the QT325S series of surface-mount crystals from TXC Corporation. The series is characterized by small form factors suitable for modern electronics. Similar parts in the lineup vary primarily by frequency, package dimensions, and tolerance grades. The 40 MHz variant serves as a common clock source for various digital systems.

Replacement Considerations

Direct substitutes include other 40 MHz crystals in the 3215 package with matching 18 pF load capacitance. Verify equivalent seam-seal construction and ±20 ppm tolerance specifications. Cross-reference pinout compatibility and mounting pad designs. Ensure thermal performance matches the original commercial grade requirements.