QT49S-11.0592MAHJ-T

Overview

The QT49S-11.0592MAHJ-T is a surface-mount quartz crystal resonator manufactured by QST, operating at a fundamental frequency of 11.0592 MHz. It features a frequency stability and tolerance of ±30 ppm at 25°C. The component utilizes an 18 pF load capacitance and exhibits an equivalent series resistance (ESR) of 40 Ohms. Designed for base mode operation, it supports a wide operating temperature range from -40°C to +85°C. The device is housed in a standard HC-49/US SMD package with dimensions of 12.7 mm in length, 4.8 mm in width, and 3.8 mm in height. It complies with RoHS3 standards and has a Moisture Sensitivity Level (MSL) rating of 1.

Feature Summary

• Provides stable clock signals for digital circuits through precise 11.0592 MHz fundamental resonance.
• Ensures reliable performance across industrial temperature ranges from -40°C to +85°C.
• Facilitates automated assembly via standard surface-mount HC-49/US packaging.

Applications

• Microcontroller clock sources
• Serial communication interfaces
• Digital logic timing references

Procurement Notes

Verify the specific suffix designations against the manufacturer's current datasheet to ensure compatibility with required load capacitance and frequency tolerance specifications. Confirm that the selected variant matches the intended operating temperature range and package dimensions for the target PCB layout. Cross-reference the RoHS3 compliance status with regional regulatory requirements prior to final procurement decisions.

Selection Notes

Select this component when a standard 11.0592 MHz frequency is required for serial data transmission applications. Ensure the circuit design accounts for the 18 pF load capacitance to maintain the specified ±30 ppm stability. Consider the 40 Ohm ESR value when designing the oscillator feedback network to guarantee reliable startup conditions within the specified temperature range.

Part Context

This part belongs to the QT49S series of surface-mount crystals from QST. The series offers various frequency options within the HC-49/US form factor. This specific model targets applications requiring common baud-rate frequencies for asynchronous communication protocols.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify direct pin-compatible alternatives only if explicitly listed by the manufacturer as equivalent replacements.