E1SJA18-3.6864M TR

Crystals Overview

The E1SJA18-3.6864M TR is a quartz crystal resonator manufactured by Ecliptek, operating at a nominal frequency of 3.6864 MHz. It features a parallel fundamental mode with a load capacitance of 18 pF and an equivalent series resistance of 200 Ohms. The component exhibits a frequency tolerance of ±15 ppm and an aging rate of 5 ppm per year. Designed for surface mount applications, it utilizes the HC-49/US package format with dimensions of 13.3 mm in length, 4.85 mm in width, and 3.2 mm in height. It operates within a temperature range of -40°C to +85°C and supports a drive level of 1 mW.

Crystals Feature Summary

• Surface mount construction using HC-49/US package geometry
• Parallel fundamental resonance operation
• Metal resistance weld seal for environmental protection

Crystals Applications

• General purpose clock signal generation
• Microcontroller system timing
• Communication interface synchronization

Crystals Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging configuration when sourcing. Confirm that the manufacturer designation aligns with current Abracon or Ecliptek product lines as corporate structures may have evolved. Ensure the datasheet revision matches the production batch requirements for compliance documentation.

Crystals Selection Notes

Select this component when a standard 3.6864 MHz reference is required for surface mount assembly processes. The HC-49/US form factor allows for compatibility with existing footprint designs while offering improved mounting stability compared to through-hole variants. Verify circuit drive levels remain within the specified 1 mW limit to prevent frequency instability.

Crystals Part Context

This part belongs to the E1SJA series of quartz crystal resonators from Ecliptek. These components are designed for high-reliability applications requiring stable frequency references. The series typically offers various frequency options within the same physical package, allowing for design flexibility across different product families.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC-49/US style crystals with identical 3.6864 MHz frequency, 18 pF load capacitance, and ±15 ppm tolerance. Ensure replacement parts maintain the same physical dimensions and electrical characteristics to guarantee board compatibility.