QT161S-27.120MDDQ-T

Overview

The QT161S-27.120MDDQ-T is a surface-mount crystal resonator manufactured by QST, operating at a nominal frequency of 27.12 MHz. It features a compact 4-SMD, No Lead package with body dimensions of 1.6 x 1.2 x 0.35 mm. The component exhibits a load capacitance of 10 pF and maintains a frequency stability and tolerance of ±20 ppm at 25°C. It is designed for reliable performance within an operating temperature range of -20°C to +70°C.

Feature Summary

• Compact 1.6 x 1.2 mm surface-mount footprint suitable for space-constrained designs
• High frequency stability of ±20 ppm ensures precise timing accuracy
• RoHS3 compliant construction supports environmentally conscious manufacturing

Applications

• Wireless communication modules requiring stable carrier frequencies
• Microcontroller clock sources for embedded systems
• RF transceiver circuits in consumer electronics

Procurement Notes

Verify the specific suffix DDQ against official QST documentation to confirm exact tolerance and stability ratings. Ensure compatibility with reflow soldering profiles specified in the datasheet. Confirm RoHS3 compliance status if required by regulatory standards. Cross-reference pinout and pad layout with target PCB design guidelines to prevent mounting errors during assembly.

Selection Notes

Select this component when a 27.12 MHz reference signal is required with ±20 ppm stability. The 10 pF load capacitance must match the oscillator circuit requirements. Consider the -20°C to +70°C temperature range for environmental suitability. The small SMD package aids in high-density board layouts compared to larger through-hole alternatives.

Part Context

This part belongs to QST's QT161S series of thin-mode crystal resonators. These components are engineered for low power consumption and high reliability in portable devices. The series offers various frequency options within a standardized small outline package, facilitating consistent mechanical integration across different product lines.

Replacement Considerations

Direct substitutes include other 27.12 MHz crystals with identical 1.6x1.2mm SMD packages and 10pF load capacitance. Verify equivalent ±20 ppm stability and -20°C to +70°C operating range before substitution. Ensure ESR values remain within acceptable limits for the target oscillator circuit.