QT161S-27.000MAAJ-T

Overview

The QST QT161S-27.000MAAJ-T is a surface-mount crystal oscillator operating at a fundamental frequency of 27 MHz. It features a compact 4-SMD, no-lead package with dimensions of 1.6 x 1.2 x 0.35 mm. The component exhibits a frequency tolerance and stability of ±30 ppm at 25°C and across the -20 to +70°C range. It utilizes an 18 pF load capacitance and has an equivalent series resistance (ESR) of 100 Ohms. The device complies with RoHS3 standards.

Feature Summary

• Compact surface-mount design suitable for space-constrained PCB layouts
• Stable frequency output with defined tolerance across industrial temperature ranges
• Compliant with environmental regulations including RoHS3

Applications

• Clock generation for microcontrollers and digital logic circuits
• RF transmitter and receiver modules requiring 27 MHz reference
• Wireless communication devices and remote control systems

Procurement Notes

Verify the manufacturer part number QT161S-27.000MAAJ-T against official QST documentation to ensure authenticity. Confirm that the specific suffix matches the required frequency and tolerance specifications. Check for RoHS3 compliance status in current supply chain data. Ensure storage conditions align with moisture sensitivity levels if applicable. Validate package dimensions against board footprint requirements prior to procurement.

Selection Notes

Select this component when a precise 27 MHz reference signal is required in a minimal footprint. Consider the ±30 ppm stability requirement against system timing constraints. Evaluate the 18 pF load capacitance compatibility with the target oscillator circuit design. Assess the ESR value for power consumption implications. Compare physical dimensions against available PCB real estate.

Part Context

This crystal belongs to the QT161S series from QST, designed for high-density electronic applications. The series offers various frequencies within a standardized small outline package. It serves as a critical timing element in consumer electronics and industrial control systems where size and cost efficiency are prioritized alongside reliable performance.

Replacement Considerations

Direct substitutes include other 27 MHz SMD crystals with identical 1.6x1.2mm footprints and 18pF load capacitance. Verify equivalent ESR and stability ratings before substitution. Cross-reference pinout configurations if alternative packages are considered. Ensure thermal characteristics match the original application environment.