QT49S-35.840MAAJ-T

Overview

The QT49S-35.840MAAJ-T is a surface-mount quartz crystal oscillator manufactured by QST, designed for precise clock signal generation in electronic circuits. It operates at a nominal frequency of 35.84 MHz with a standard load capacitance of 18 pF. The component exhibits a frequency tolerance and stability of ±30 ppm at 25°C and across the operating temperature range of -20°C to +70°C. It utilizes an HC-49/US package, measuring approximately 12.7 x 4.8 x 3.8 mm, and supports third overtone operation mode. The unit is RoHS compliant and lead-free, ensuring environmental safety standards are met for modern manufacturing processes.

Feature Summary

• Surface-mount design compatible with automated assembly processes
• Third overtone operation mode for stable high-frequency performance
• RoHS compliant and lead-free construction for environmental regulation adherence

Applications

• Clock source generation for personal computers
• Timing reference for set-top boxes
• Display driver synchronization
• Cable modem communication interfaces

Procurement Notes

Verify the specific suffix 'MAAJ' against official QST documentation to confirm the exact load capacitance and temperature range specifications. Ensure that the procurement channel provides genuine components with valid traceability records. Cross-reference the part number with the manufacturer's current product status to confirm active production availability before finalizing orders.

Selection Notes

Select this component when a 35.84 MHz clock signal is required for consumer electronics applications within a -20°C to +70°C environment. The ±30 ppm stability is suitable for general-purpose timing needs. Ensure the circuit design accommodates the 18 pF load capacitance requirement. Consider the HC-49/US footprint constraints during PCB layout planning to ensure proper mechanical fit and solder joint integrity.

Part Context

This model belongs to the QT49S series of surface-mount crystals from QST, which are widely used in consumer electronics. The series offers various frequency options within the HC-49/US form factor. The MAAJ suffix typically denotes specific electrical characteristics such as load capacitance and tolerance levels defined by the manufacturer for standard commercial grade applications.

Replacement Considerations

Compatible substitutes include the QT49S-35.840MBBK-T and QT49S-35.840MAHJ-T. Verify that alternative parts match the 35.84 MHz frequency, 18 pF load capacitance, and ±30 ppm stability requirements. Confirm that the replacement maintains the same HC-49/US package dimensions and third overtone operation mode for direct integration.