QT49S-37.500MAAE-T

Overview

The QT49S-37.500MAAE-T is a surface-mount crystal oscillator manufactured by QST. It operates at a nominal frequency of 37.5 MHz with a frequency tolerance and stability of ±30 ppm across the operating temperature range of -20°C to +70°C. The component features a load capacitance of 12 pF and an equivalent series resistance (ESR) of 80 Ohms. It utilizes the HC-49/US form factor adapted for surface mount technology, ensuring reliable timing performance in compact electronic designs.

Feature Summary

• Surface mount construction utilizing HC-49/US package geometry
• Frequency stability maintained within ±30 ppm over specified temperature range
• Designed for third overtone operation mode

Applications

• General purpose timing circuits requiring precise clock signals
• Embedded systems with space-constrained PCB layouts
• Consumer electronics utilizing surface mount assembly processes

Procurement Notes

Verify that the received components match the specific model number QT49S-37.500MAAE-T and confirm compliance with RoHS standards. Ensure storage conditions adhere to manufacturer guidelines to preserve solderability and electrical characteristics prior to assembly.

Selection Notes

Select this component when a 37.5 MHz surface-mount crystal with ±30 ppm stability is required. Consider the 12 pF load capacitance requirement for circuit design compatibility. Evaluate the 80 Ohm ESR against oscillator circuit constraints to ensure proper startup and sustained oscillation.

Part Context

This part belongs to the QST QT49S series of surface-mount crystals. The series offers various frequency options within the HC-49/US footprint, providing designers with standardized sizing for high-volume manufacturing while maintaining the electrical performance characteristics associated with traditional through-hole crystal packages.

Replacement Considerations

Cross-reference with other manufacturers offering HC-49/US SMD crystals at 37.5 MHz with ±30 ppm stability and 12 pF load capacitance. Verify mechanical dimensions and pinout compatibility before substitution.