QT532S-27.120MEEQ-T

Overview

The QT532S-27.120MEEQ-T is a surface-mount crystal resonator manufactured by QST, designed for precise frequency generation in electronic circuits. It operates at a nominal frequency of 27.12 MHz with both tolerance and stability rated at ±10 ppm. The component features a load capacitance of 10 pF and an equivalent series resistance of 40 Ohms. It utilizes a fundamental mode of oscillation within a compact 4-SMD, no-lead package measuring 5.0 x 3.2 mm. The device supports an operating temperature range from -20°C to +70°C, ensuring reliable performance in standard commercial environments.

Feature Summary

• Provides stable frequency reference using fundamental mode quartz technology
• Engineered for surface-mount assembly with leadless four-terminal configuration
• Maintains consistent electrical characteristics across specified industrial temperature ranges

Applications

• Wireless communication modules requiring 27.12 MHz clock signals
• RF transmitter and receiver circuitry
• Microcontroller system clocks
• Consumer electronics timing references

Procurement Notes

Verify the manufacturer designation on official documentation, as some sources list TXC while others specify QST. Confirm that the ordering suffix corresponds to the exact frequency and package variant required. Ensure compatibility with reflow soldering profiles suitable for leadless SMD components. Cross-reference the specific part number against the latest datasheet to validate electrical parameters before integration into production designs.

Selection Notes

Select this component when a 27.12 MHz fundamental frequency is required with ±10 ppm stability. The 10 pF load capacitance must match the oscillator circuit design. Consider the 40 Ohm ESR for drive level sensitivity. The -20°C to +70°C range suits general commercial applications rather than harsh industrial or automotive environments. The small footprint allows for dense PCB layouts.

Part Context

This model belongs to the QT532S series of surface-mount crystals. The series offers various frequencies and package sizes optimized for modern electronics manufacturing. The QT532S variant specifically provides a balance between size and performance for consumer-grade applications. It represents a standard solution for timing needs where moderate stability suffices.

Replacement Considerations

The 7B-27.120MEEQ-T is documented as a mechanical and electrical substitute. Both parts share identical specifications including 27.12 MHz frequency, ±10 ppm stability, and 10 pF load capacitance. Verify pinout and mounting dimensions before substitution.