E1SJA18-8.000M TR

Crystals Overview

The E1SJA18-8.000M TR is an 8 MHz quartz crystal resonator manufactured by Ecliptek, housed in a short HC-49/US surface mount package. It operates in parallel fundamental mode with a load capacitance of 18 pF and offers a frequency tolerance of ±15 ppm at 25°C, extending to ±30 ppm across the -40°C to +85°C range. The device features a maximum aging rate of 5 ppm per year and supports a drive level of 1000 µW. Compliant with RoHS standards, it utilizes resistance welding for sealing and is supplied in tape and reel packaging.

Crystals Feature Summary

• Short HC-49/US surface mount form factor designed for compact PCB layouts
• Resistance welded seal ensuring environmental stability and reliability
• AT-cut quartz element providing stable parallel fundamental resonance
• RoHS compliant lead-free construction suitable for global regulatory requirements

Crystals Applications

• Microcontroller clock generation circuits
• Communication interface timing references
• Industrial control system oscillators
• Consumer electronics timing modules

Crystals Procurement Notes

Verify that the specific order suffix matches the required tolerance and temperature range specifications. Confirm the package variant corresponds to the short HC-49/US SMD footprint rather than through-hole versions. Ensure compatibility with the target circuit's load capacitance requirements, as the component is specified for 18 pF loading. Check for any specific handling instructions related to the tape and reel packaging format during assembly.

Crystals Selection Notes

Select this component when a standard 8 MHz reference is needed in a space-constrained surface mount application. It is suitable for designs requiring moderate frequency stability within industrial temperature ranges. Consider the 18 pF load capacitance requirement for oscillator circuit design to ensure accurate frequency performance. Evaluate the ±15 ppm initial tolerance against system timing accuracy needs before finalizing the part choice.

Crystals Part Context

This part belongs to the E1S series of short HC-49/US crystals from Ecliptek. The series provides various frequency options in a standardized surface mount package, balancing size reduction with traditional crystal performance characteristics. It serves as a direct replacement for legacy through-hole HC-49 units where board space is limited.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' 8 MHz crystals in short HC-49/US packages with 18 pF load capacitance and similar ±15 ppm tolerance. Verify equivalent electrical parameters such as ESR and drive level before substitution.