QT532S-27.120MAHJ-T

Overview

The QT532S-27.120MAHJ-T is a surface-mount quartz crystal resonator manufactured by QST, operating at a fundamental frequency of 27.12 MHz. It features a frequency stability and tolerance of ±30 ppm at 25°C. The component utilizes an 18 pF load capacitance and exhibits an equivalent series resistance (ESR) of 40 Ohms. Housed in a compact 4-SMD, No Lead package with dimensions of 5.00mm x 3.20mm and a maximum height of 1.35mm, it supports base mode operation. The device is rated for an extended operating temperature range from -40°C to +85°C and complies with RoHS3 standards.

Feature Summary

• Compact 4-SMD no-lead surface mount design suitable for space-constrained PCB layouts
• High frequency stability of ±30 ppm ensuring precise timing accuracy
• Extended industrial temperature rating supporting reliable operation from -40°C to +85°C
• Fundamental mode resonance with low equivalent series resistance

Applications

• Clock signal generation for microprocessors and microcontrollers
• Timing references for communication interfaces such as UART and SPI
• Frequency control in portable consumer electronics devices
• Oscillator circuits in embedded system hardware

Procurement Notes

Verify the specific suffix 'MAHJ-T' against the manufacturer's current datasheet to confirm package orientation and termination specifications. Ensure the selected variant matches the required load capacitance and ESR values for the target oscillator circuit design. Cross-reference the RoHS3 compliance status with regional regulatory requirements prior to final procurement approval.

Selection Notes

Select this component when a 27.12 MHz fundamental frequency is required with strict ±30 ppm stability constraints. The 4-SMD form factor is appropriate for automated surface mount assembly processes. Evaluate the 40 Ohm ESR against the oscillator circuit's drive level limitations to prevent over-driving the crystal. Confirm that the -40°C to +85°C temperature range aligns with the environmental conditions of the end application.

Part Context

This part belongs to the QT532S series of quartz crystals from QST, designed for general-purpose timing applications. The series offers various frequency options within a standardized 5.0mm x 3.2mm footprint. The QT532S-27.120MAHJ-T specifically addresses needs for stable clock sources in digital logic systems requiring moderate precision and industrial temperature resilience.

Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include CTS-Frequency Controls part numbers 445I23D12M00000 and 445I33D12M00000. Verify pin compatibility and electrical parameters before substitution.