QT532G-20.000MAAJ-T

Overview

The QT532G-20.000MAAJ-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precision timing applications. It operates at a fundamental frequency of 20 MHz with a load capacitance of 18 pF and an equivalent series resistance (ESR) of 50 Ohms. The component exhibits a frequency tolerance and stability of ±30 ppm across the commercial temperature range of -20°C to +70°C. Housed in a compact 2-SMD, no-lead package measuring 5.0 mm x 3.2 mm x 1.2 mm, it supports fundamental mode operation and complies with RoHS3 standards.

Feature Summary

• Provides stable 20 MHz timing signals with ±30 ppm frequency accuracy
• Utilizes a compact 5.0x3.2 mm surface-mount footprint for space-constrained designs
• Operates reliably within the -20°C to +70°C commercial temperature range

Applications

• General-purpose digital circuit timing references
• Microcontroller clock sources
• Communication interface synchronization
• Consumer electronics timing modules

Procurement Notes

Verify that the specific part number QT532G-20.000MAAJ-T matches the required 18pF load capacitance and ±30 ppm tolerance specifications before integration. Confirm the manufacturer is QST, as similar part numbers may exist from other vendors like TXC with different electrical characteristics. Ensure the supply chain provides valid RoHS3 compliance documentation. Cross-reference the datasheet for the exact pin configuration and recommended soldering profile to prevent mechanical stress or performance degradation during assembly.

Selection Notes

Select this component when a 20 MHz fundamental frequency with ±30 ppm stability is required for commercial-grade environments. The 18pF load capacitance must match the oscillator circuit design to ensure accurate frequency generation. Consider the 50 Ohm ESR value for compatibility with the driving circuit's power requirements. This SMD package is suitable for automated pick-and-place assembly. Evaluate thermal constraints to ensure operation remains within the specified -20°C to +70°C range.

Part Context

This crystal belongs to the QT532G series, which features a standardized 5.0x3.2 mm surface-mount form factor. The series offers various frequency options and tolerance grades, with the MAAJ suffix typically denoting specific packaging and tolerance configurations. It serves as a direct replacement for older 7A series crystals from TXC Corporation, such as the 7A-20.000MBBK-T, maintaining similar physical dimensions while potentially offering updated manufacturing processes.

Replacement Considerations

The QT532G-20.000MAAJ-T can replace the discontinued TXC 7A-20.000MBBK-T. Verify that the substitute maintains the 18pF load capacitance and 50 Ohm ESR. Check if the replacement requires any PCB layout adjustments due to potential minor dimensional differences in the lead frame.