QT532G-28.63636MAHJ-T

Overview

The QT532G-28.63636MAHJ-T is a quartz crystal resonator manufactured by QST, designed for precision timing applications. It operates at a fundamental frequency of 28.63636 MHz with a tolerance of ±30 ppm across the industrial temperature range of -40°C to +85°C. The component features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 50 ohms maximum. It utilizes a glass-sealed package in a 5.0 x 3.2 mm surface-mount footprint, offering two solder pads for reliable board attachment.

Feature Summary

• Glass-sealed construction for environmental stability
• Surface-mount design compatible with automated assembly
• Industrial temperature range operation

Applications

• Microcontroller clock sources
• Communication module timing references
• Digital signal processing circuits

Procurement Notes

Verify the manufacturer designation carefully, as the model prefix may appear associated with different suppliers in distribution channels. Confirm that the specific suffix matches the required frequency and tolerance specifications. Ensure the glass-seal package type aligns with your assembly requirements. Cross-reference the part number against official QST documentation to validate authenticity and technical parameters before procurement.

Selection Notes

Select this component when a stable 28.63636 MHz reference is required within a compact surface-mount form factor. The ±30 ppm tolerance suits general digital logic and communication interfaces. Consider the 18 pF load capacitance compatibility with the target oscillator circuit. The glass-seal option provides better humidity resistance compared to standard ceramic packages for harsh environments.

Part Context

This crystal belongs to the QT532G series of surface-mount quartz resonators from QST. The series offers various frequencies and package sizes optimized for consumer electronics and industrial equipment. The 'G' suffix indicates the ±30 ppm tolerance grade over the extended temperature range, distinguishing it from other variants in the lineup.

Replacement Considerations

The 7A-28.63636MAHJ-T is identified as an obsolete substitute option. Verify electrical equivalence including frequency, load capacitance, and ESR before replacement. Ensure the physical dimensions and pin configuration are compatible with the existing footprint.