E1SJA18-9.8304M TR

Crystals Overview

The E1SJA18-9.8304M TR is a surface-mount quartz crystal resonator manufactured by Ecliptek, designed for parallel fundamental mode operation. It features an AT-cut quartz element housed in a resistance-welded SMD package with two pins. The nominal operating frequency is 9.8304 MHz, supported by a load capacitance of 18 pF. Frequency tolerance is specified at ±15 ppm at 25°C, with stability extending to ±20 ppm across the industrial temperature range of -40°C to +85°C. Aging is limited to 5 ppm per year maximum. The device operates with a drive level of 1000 µW and exhibits a shunt capacitance of 7 pF maximum.

Crystals Feature Summary

• AT-cut quartz construction ensures stable parallel fundamental resonance characteristics.
• Resistance-welded SMD packaging provides mechanical durability and environmental sealing.
• RoHS compliant and lead-free manufacturing process supports regulatory compliance.

Crystals Applications

• Serial communication interfaces requiring standard baud rate frequencies
• Microcontroller clock generation circuits
• Industrial control systems operating within extended temperature ranges

Crystals Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance documentation matches current regulatory standards. Ensure storage conditions adhere to moisture sensitivity level guidelines prior to reflow soldering. Validate that the specific tape and reel packaging meets automated assembly requirements for the target production line.

Crystals Selection Notes

Select this component when a precise 9.8304 MHz frequency is required for digital timing applications. The 18 pF load capacitance must align with the oscillator circuit design to maintain accuracy. Consider the HC-49/UP form factor for PCB space constraints. Verify that the ±15 ppm tolerance meets system jitter specifications. Evaluate thermal performance against the -40°C to +85°C operational envelope.

Crystals Part Context

This part belongs to the E1S series of surface-mount crystals from Ecliptek. It utilizes the HC-49/UP short-body package style, offering a compact footprint suitable for modern electronics. The series emphasizes reliability through resistance welding techniques, distinguishing it from epoxy-sealed alternatives. It serves as a passive timing element in broader electronic assemblies.

Crystals Replacement Considerations

Direct substitutes include other HC-49/UP SMD crystals with identical 9.8304 MHz frequency, 18 pF load capacitance, and ±15 ppm tolerance. Verify equivalent aging rates and drive level specifications to ensure circuit compatibility. Cross-reference package dimensions for mechanical fitment.