QT161S-38.400MDDQ-T

Overview

The QT161S-38.400MDDQ-T is a surface-mount crystal oscillator manufactured by QST, designed for precise timing applications. It operates at a nominal frequency of 38.4 MHz with a frequency tolerance and stability of ±20 ppm at 25°C. The component features a load capacitance of 10 pF and is housed in a compact 1.6 x 1.2 mm SMD package without leads. This quartz resonator provides reliable clock signals for digital circuits requiring stable frequency references within specified temperature ranges.

Feature Summary

• Compact surface-mount design suitable for space-constrained PCB layouts
• High frequency stability ensuring consistent timing performance
• Standard load capacitance configuration for easy integration

Applications

• Microcontroller clock sources
• Communication interface timing
• Digital signal processing systems

Procurement Notes

Verify the specific suffix MDDQ to confirm the ±20 ppm tolerance and 10 pF load capacitance specifications. Ensure the ordering part number matches the required frequency stability and package dimensions. Cross-reference with official QST documentation to confirm active status and RoHS compliance before procurement.

Selection Notes

Select this component when a 38.4 MHz reference with ±20 ppm stability is required. The 1.6 x 1.2 mm footprint suits high-density designs. Consider thermal stability requirements as the specification typically covers limited temperature ranges unless otherwise noted in the full datasheet.

Part Context

This part belongs to the QT161S series of quartz crystals from QST. The series offers various frequencies and tolerances, with the MDDQ suffix indicating specific stability and packaging characteristics. It is commonly used in consumer electronics and industrial control systems where small form factor and moderate precision are needed.

Replacement Considerations

Direct substitutes include other 38.4 MHz crystals with identical 1.6 x 1.2 mm packages and ±20 ppm tolerance. Verify load capacitance compatibility with the host circuit. Alternative manufacturers may offer similar specifications but require validation of electrical parameters and mechanical fit.