ATSM-49-R 4.000000

Overview

The ATSM-49-R 4.000000 is a surface-mount fundamental AT-cut crystal oscillator manufactured by MtronPTI. It operates at a nominal frequency of 4 MHz with a load capacitance of 18 pF and an equivalent series resistance (ESR) of 150 Ohms. The component features a frequency tolerance of ±30 ppm and a stability of ±50 ppm, operating within a temperature range of -10°C to +70°C. Housed in an HC-49/US package, this RoHS-compliant device provides precise timing signals for electronic circuits.

Feature Summary

• Surface mount construction utilizing AT-cut quartz technology for stable oscillation
• RoHS compliant manufacturing process ensuring environmental safety standards
• Fundamental operating mode designed for reliable digital timing applications

Applications

• Microcontroller clock sources
• Digital circuit timing references
• General purpose frequency control systems

Procurement Notes

Verify the specific suffix configuration against the manufacturer's current datasheet to ensure compliance with required frequency tolerance and temperature specifications. Confirm that the HC-49/US package dimensions align with the target PCB layout constraints. Check for any recent revisions to the RoHS declaration status prior to final procurement authorization.

Selection Notes

Select this component when a surface-mount solution is required for 4 MHz timing applications. Ensure the system design accommodates the specified 18 pF load capacitance to maintain accurate frequency performance. Verify that the operating environment remains within the -10°C to +70°C range to guarantee the stated stability metrics are achieved during operation.

Part Context

This part belongs to the ATSM-49 series of surface-mount crystals from MtronPTI. The series offers various fundamental frequency options in a standardized HC-49/US footprint. The '-R' suffix indicates RoHS compliance, distinguishing it from non-compliant variants within the same product family while maintaining identical electrical characteristics.

Replacement Considerations

Consult official cross-reference lists for direct substitutes. Generic replacements must match the 4 MHz frequency, 18 pF load capacitance, and HC-49/US package dimensions. Verify that alternative sources provide equivalent ESR values and temperature stability ranges to ensure functional compatibility.