QT161S-27.120MAAJ-T

Overview

The QT161S-27.120MAAJ-T is a quartz crystal resonator manufactured by QST, operating at a nominal frequency of 27.12 MHz. It features a fundamental mode of oscillation with a load capacitance of 18 pF and a series resistance of 100 Ohms. The component exhibits a frequency tolerance of ±30 ppm and a stability of ±30 ppm within the temperature range of -20°C to +70°C. It is housed in a compact 4-pin CSMD package with dimensions of 1.6 x 1.2 x 0.35 mm.

Feature Summary

• Provides accurate frequency output for timing applications
• Compact surface-mount design suitable for space-constrained layouts
• Stable performance across specified industrial temperature ranges

Applications

• Timing source for low-power embedded designs
• Clock generation in consumer electronics
• Signal processing circuits requiring precise frequency reference

Procurement Notes

Verify that the ordering suffix matches the required load capacitance and tolerance specifications. Confirm the manufacturer designation is QST rather than TXC, as part numbers may appear under different branding in distributor catalogs. Ensure the package type corresponds to the 4-pin CSMD configuration. Check RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a 27.12 MHz fundamental frequency is required with moderate stability requirements. The 18 pF load capacitance must match the oscillator circuit design. Consider the 100 Ohm series resistance for drive level limitations. The small footprint allows integration into dense PCB layouts where larger crystals cannot fit.

Part Context

This part belongs to the QT161S series of surface-mount quartz crystals. The series offers various frequencies and package sizes optimized for modern electronic devices. The specific model indicates a 27.12 MHz variant with standard commercial/industrial temperature ratings and basic stability metrics common in general-purpose timing applications.

Replacement Considerations

Cross-reference with other manufacturers offering 27.12 MHz crystals in 1.6x1.2mm packages. Verify equivalent electrical parameters including load capacitance and ESR before substitution. Ensure pin compatibility and mechanical footprint alignment for direct replacement.