QT161S-27.120MEEQ-T

Overview

The QT161S-27.120MEEQ-T is a surface-mount crystal oscillator manufactured by QST, operating at a fundamental frequency of 27.12 MHz. It features a compact SMD package with dimensions of 1.6 x 1.2 x 0.35 mm and utilizes a four-terminal no-lead design for reliable soldering. The component exhibits a load capacitance of 10 pF and an equivalent series resistance (ESR) of 50 Ohms. Frequency stability is specified at ±10 ppm over the commercial temperature range of -20°C to +70°C, ensuring consistent performance in standard electronic applications.

Feature Summary

• Compact four-terminal surface-mount design for automated assembly
• High frequency stability within ±10 ppm tolerance
• Low profile package suitable for space-constrained PCB layouts

Applications

• Clock generation for microcontrollers and digital signal processors
• Video processing systems requiring precise timing references
• Consumer electronics with limited board space requirements

Procurement Notes

Verify that the specific suffix EEQ-T matches the required frequency tolerance and temperature range specifications for your application. Confirm package dimensions and terminal configuration align with your PCB footprint design. Ensure compatibility with standard reflow soldering profiles to maintain component integrity during assembly processes.

Selection Notes

Select this component when a small form factor is critical alongside stable clock performance. The 10 pF load capacitance requires matching circuit design to achieve accurate frequency output. Consider the 50 Ohm ESR value for oscillator circuit stability margins. Evaluate thermal requirements against the -20°C to +70°C operational range before implementation.

Part Context

This part belongs to the QT161S series of surface-mount crystals from QST. The series offers various frequency options and tolerance grades. The specific model denotes a 27.12 MHz unit with ±10 ppm stability. Similar parts in the family may differ in package size or frequency characteristics.

Replacement Considerations

Direct substitutes include other manufacturers' 27.12 MHz crystals with identical 1.6x1.2mm dimensions and 10pF load capacitance. Verify pinout compatibility and electrical parameters such as ESR and stability before substitution.