QT49S-4.9152MAHJ-T

Overview

The QT49S-4.9152MAHJ-T is a quartz crystal resonator manufactured by QST, operating at a fundamental frequency of 4.9152 MHz. It features a frequency stability and tolerance of ±30 ppm. The component utilizes an 18 pF load capacitance and exhibits a series resistance of 150 Ohms. Designed for surface-mount technology (SMD), it adheres to the HC-49/US form factor with physical dimensions of 12.7 x 4.8 x 3.8 mm. The unit supports an operating temperature range from -40°C to +85°C and is supplied in tape and reel packaging.

Feature Summary

• Surface-mount construction utilizing HC-49/US package geometry
• Quartz resonator material ensuring stable oscillation
• Wide operational temperature capability for industrial environments

Applications

• Microcontroller clock sources
• Communication interface timing circuits
• General-purpose oscillator modules

Procurement Notes

Verify the specific suffix configuration against official QST documentation to ensure compatibility with required load capacitance and frequency tolerance specifications. Confirm that the surface-mount variant matches the target PCB footprint dimensions of 12.7 x 4.8 mm. Ensure the selected packaging format aligns with automated assembly requirements.

Selection Notes

Select this component when a 4.9152 MHz reference signal is required with moderate stability constraints. The HC-49/US SMD form factor allows for retrofitting or design-in where standard through-hole footprints are unavailable. Consider the 150 Ohm series resistance for driver strength requirements in the host circuit design.

Part Context

This part belongs to the QT49S series of quartz crystals produced by QST. The series offers various frequency options within the same mechanical envelope. The specific model denotes a 4.9152 MHz output, distinguishing it from other variants such as 16.000 MHz or 24.000 MHz models within the same product family.

Replacement Considerations

Direct substitutes must match the 4.9152 MHz frequency, 18 pF load capacitance, and HC-49/US SMD package. Verify equivalent electrical parameters including ±30 ppm stability and 150 Ohm series resistance before integration.