HC49U/N-R 2.000000

Overview

The MtronPTI HC49U/N-R 2.000000 is a fundamental parallel quartz crystal resonator with a nominal frequency of 2 MHz. It utilizes an AT-cut design housed in a surface-mount HC-49/US package featuring four pins. The component exhibits a frequency stability of ±50 ppm and operates within a temperature range of -10 °C to 60 °C. Key electrical parameters include a load capacitance of 18 pF, a maximum drive level of 600 µW, and a series resistance of 600 Ω.

Feature Summary

• AT-cut quartz construction for stable oscillation
• Surface-mount HC-49/US package configuration
• Fundamental parallel resonance mode operation

Applications

• General-purpose clock signal generation
• Microcontroller system timing references
• Digital logic circuit synchronization

Procurement Notes

Verify the specific suffix or variant code against the manufacturer's current documentation to ensure compatibility with required tolerance and temperature specifications. Confirm that the surface-mount footprint matches the target PCB layout dimensions. Ensure the selected component meets all environmental compliance standards required for the final assembly process.

Selection Notes

Select this component when a 2 MHz reference frequency is required in a compact surface-mount form factor. Consider the ±50 ppm frequency stability and the 600 µW maximum drive level to ensure proper oscillator circuit design. Verify that the operating temperature range of -10 °C to 60 °C aligns with the intended application environment.

Part Context

This part belongs to the HC-49U/N series of surface-mount crystals from MtronPTI. These components are designed as direct replacements for traditional through-hole HC-49/U crystals, offering similar electrical characteristics while enabling automated surface-mount assembly processes. The series supports various standard frequencies for general electronic applications.

Replacement Considerations

Direct substitutes must match the 2 MHz frequency, HC-49/US SMD package, and 18 pF load capacitance. Verify equivalent series resistance and drive level specifications to maintain oscillator performance.