E1SFA18-8.000M TR

Crystals Overview

The E1SFA18-8.000M TR is a quartz crystal resonator manufactured by Ecliptek, operating at a nominal frequency of 8.000 MHz. It features a parallel fundamental mode of operation with a load capacitance of 18 pF and a frequency tolerance of ±30 ppm at 25°C. The component utilizes an HC-49/US package with surface mount installation, measuring 11.60 mm in length, 4.85 mm in width, and 3.20 mm in maximum height. It exhibits a maximum equivalent series resistance (ESR) of 90 Ohms and supports a drive level up to 1 mWatt. The unit operates within a temperature range of -40°C to +85°C and includes MIL-STD-883 compliant lead termination options.

Crystals Feature Summary

• Surface mount construction utilizing the standard HC-49/US package geometry for reliable PCB integration.
• Parallel resonant fundamental mode operation ensuring stable frequency generation for clock circuits.
• Resistance weld seal technology providing hermetic protection against environmental contaminants.
• Compliance with RoHS directives and availability in tape and reel packaging for automated assembly.

Crystals Applications

• Microcontroller system clock generation
• Communication interface timing references
• Digital logic circuit synchronization

Crystals Procurement Notes

Verify the specific suffix designation to confirm the exact packaging configuration, as the part may be available in cut tape or reel formats depending on distributor inventory. Confirm that the required frequency tolerance of ±30 ppm aligns with the design specifications, as tighter tolerances are not supported by this specific model number. Ensure the application circuit drives the crystal within the specified 1 mWatt maximum drive level to prevent frequency drift or mechanical damage. Check for any specific lead termination requirements if MIL-STD-883 compliance is mandatory for the end product.

Crystals Selection Notes

Select this component when a surface mount solution is preferred over through-hole mounting while maintaining the robustness of the HC-49 form factor. The 18 pF load capacitance must match the oscillator circuit design to achieve the specified ±30 ppm accuracy. Consider the -40°C to +85°C operating range to ensure performance stability across the intended environmental conditions. This model is suitable for general-purpose digital applications where moderate frequency stability is sufficient.

Crystals Part Context

This component belongs to the E1S series of quartz crystals from Ecliptek, designed for surface mount applications. The series offers various frequency options within the HC-49/US package, balancing size constraints with electrical performance. The E1SFA18-8.000M TR specifically targets the 8 MHz frequency point, a common choice for microprocessor clocks and communication baud rates. The manufacturer provides datasheets detailing the mechanical dimensions and electrical characteristics to support schematic capture and PCB layout.

Crystals Replacement Considerations

Direct substitutes include other Ecliptek models within the same E1S series with identical package and electrical parameters but different frequencies. Cross-manufacturer replacements must match the HC-49/US footprint, 18 pF load capacitance, and 8.000 MHz frequency. Verify that alternative parts meet the same ±30 ppm tolerance and operate within the -40°C to +85°C range to maintain system compatibility.