E1SJA18-4.433619M TR

Crystals Overview

The E1SJA18-4.433619M TR is a surface-mount quartz crystal resonator from the Ecliptek E1S series, designed for parallel fundamental operation. It features a nominal frequency of 4.433619 MHz with a load capacitance of 18 pF. The component offers a frequency tolerance of ±15 ppm at 25°C and ±30 ppm over the operating temperature range of -40°C to +85°C. It utilizes an HC-49/US package format with resistance welding construction. Key electrical specifications include a maximum equivalent series resistance of 200 ohms and a shunt capacitance typical value. The device is RoHS compliant and lead-free, suitable for automated SMD assembly processes.

Crystals Feature Summary

• Surface-mount construction using HC-49/US package geometry for reliable PCB integration
• Parallel fundamental mode operation optimized for standard oscillator circuits
• Resistance welded sealing technology ensuring long-term stability and environmental protection
• RoHS compliant manufacturing process supporting lead-free assembly requirements

Crystals Applications

• Microcontroller clock generation in embedded systems
• Communication interface timing references
• General-purpose digital circuit synchronization
• Consumer electronics main clock sources

Crystals Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging configuration when sourcing. Confirm the manufacturer designation aligns with current Ecliptek or Abracon product lines as corporate structures may have evolved. Ensure the ordering part number matches the exact frequency and tolerance requirements for your design. Check for any updated compliance documentation regarding RoHS directives applicable in your target market. Validate that the HC-49/US footprint matches your board layout constraints before finalizing procurement.

Crystals Selection Notes

Select this component when a precise 4.433619 MHz reference is required for parallel resonance applications. The 18 pF load capacitance must match the external capacitors in the oscillator circuit to achieve specified accuracy. Consider the ±30 ppm total stability over the industrial temperature range for system timing budgets. The 200 ohm ESR limit ensures compatibility with standard CMOS oscillator drivers. Evaluate the physical dimensions against available space on the printed circuit board.

Crystals Part Context

This part belongs to the E1S series of short HC-49/UP style surface-mount crystals manufactured by Ecliptek. The series provides a compact alternative to through-hole HC-49/U packages while maintaining similar electrical characteristics. These components are widely used in industrial and consumer electronics where space constraints prohibit larger resonators. The E1S line emphasizes reliability through resistance welding techniques.

Crystals Replacement Considerations

Direct substitutes must match the 4.433619 MHz frequency, 18 pF load capacitance, and HC-49/US package outline. Verify that alternative sources offer identical ±15 ppm initial tolerance and ±30 ppm total stability. Ensure the replacement component supports parallel fundamental mode operation. Cross-reference equivalent parts from other manufacturers offering RoHS-compliant surface-mount crystals.