ATSM-49-R 3.686400

Overview

The ATSM-49-R 3.686400 is a surface mount crystal resonator manufactured by MtronPTI, operating at a fundamental frequency of 3.6864 MHz. It utilizes an HC-49/US package configuration and features a load capacitance of 18 pF with a series resistance of 200 Ohms. The component provides a frequency tolerance of ±30 ppm and supports operation in tape and reel packaging for automated assembly processes.

Feature Summary

• Surface mount design utilizing the standard HC-49/US package form factor
• Fundamental quartz crystal operation optimized for precise timing applications
• Compatible with tape and reel packaging for efficient manufacturing integration

Applications

• General purpose digital circuit timing
• Microcontroller clock sources
• Communication interface synchronization

Procurement Notes

Verify that the specific order quantity matches the required tape and reel specifications to ensure compatibility with automated pick-and-place equipment. Confirm that the HC-49/US package dimensions align with the designated footprint on the printed circuit board layout. Ensure that the 18 pF load capacitance requirement is consistent with the oscillator circuit design parameters to maintain accurate frequency stability.

Selection Notes

Select this component when a standard HC-49/US footprint is required in a surface mount configuration. The 30 ppm tolerance suits applications where moderate frequency accuracy is sufficient. Consider the 200 Ohm series resistance when evaluating drive level requirements within the target oscillator circuit topology.

Part Context

This part belongs to the MtronPTI family of surface mount crystal resonators. It adapts the traditional through-hole HC-49/US mechanical profile into a surface mount variant, facilitating modern PCB assembly techniques while retaining familiar dimensional characteristics for legacy design migrations.

Replacement Considerations

Direct substitutes must match the 3.6864 MHz frequency, HC-49/US package outline, 18 pF load capacitance, and ±30 ppm tolerance. Verify equivalent series resistance and drive level specifications before implementation.