QT49S-48.000MAAE-T

Overview

The QT49S-48.000MAAE-T is a surface-mount quartz crystal oscillator manufactured by QST Products LLC. It operates at a nominal frequency of 48 MHz with a load capacitance of 12 pF and an equivalent series resistance (ESR) of 80 Ohms. The component provides a frequency stability and tolerance of ±30 ppm at 25°C, maintaining this specification across an operating temperature range of -20°C to +70°C. It utilizes the HC-49/US package form factor, measuring 12.7 x 4.8 x 3.8 mm, and is RoHS compliant.

Feature Summary

• Surface-mount design utilizing the HC-49/US package form factor for compact integration.
• Operates at a standard 48 MHz frequency with 12 pF load capacitance.
• Maintains ±30 ppm frequency stability across industrial temperature ranges.

Applications

• Clock signal generation for microcontrollers and digital logic circuits.
• Communication interface timing for USB and Ethernet controllers.
• System clock sources for embedded processing modules.

Procurement Notes

Verify the specific manufacturer designation, as sourcing data references both QST and TXC Corporation for similar part numbers. Confirm that the component meets RoHS compliance requirements for your assembly process. Ensure the surface-mount footprint matches the 12.7 x 4.8 x 3.8 mm dimensions specified for the HC-49/US style. Cross-reference the ESR value of 80 Ohms against circuit design constraints to ensure proper oscillation startup conditions.

Selection Notes

Select this component when a 48 MHz clock source is required for surface-mount applications. The HC-49/US form factor offers a balance between performance and board space efficiency compared to through-hole variants. Consider the ±30 ppm tolerance if higher precision is not critical for the application. Verify compatibility with the target load capacitance of 12 pF in the host circuit design.

Part Context

This part belongs to the QT49S series of surface-mount crystals from QST Products LLC. The series includes various frequencies such as 12.288 MHz, 16 MHz, and 24.576 MHz, all sharing similar electrical characteristics and package dimensions. The 'MAAE' suffix typically denotes specific tolerance and temperature stability grades within the product line.

Replacement Considerations

Direct substitutes include other 48 MHz surface-mount crystals with identical 12 pF load capacitance and ±30 ppm tolerance. Check for compatible ESR values around 80 Ohms to ensure oscillation reliability. Alternative packages may require mechanical adaptation unless the footprint is standardized.