E1SJA18-12.288M TR

Crystals Overview

The E1SJA18-12.288M TR is a quartz crystal resonator from the Ecliptek E1S series, designed for surface mount applications. It operates at a nominal frequency of 12.288 MHz with an AT-cut fundamental parallel resonance mode. The component features a resistance-welded seal within a short HC-49/UP SMD package measuring 13.3 x 4.85 x 3.2 mm. Key electrical parameters include a load capacitance of 18 pF, a maximum series resistance of 70 Ω, and a drive level of 1 mWatt. Frequency tolerance is ±15 ppm at 25°C, extending to ±30 ppm over the operating temperature range of -40°C to +85°C. Aging is specified at 5 ppm per year.

Crystals Feature Summary

• Surface mount construction utilizing a short HC-49/UP package with resistance-welded metal seal
• AT-cut fundamental parallel resonance operation for stable frequency generation
• RoHS compliant and lead-free manufacturing process
• Wide industrial operating temperature range supporting -40°C to +85°C

Crystals Applications

• Clock signal generation in digital circuits
• Microcontroller and microprocessor timing references
• Communication interface synchronization
• General-purpose electronic timing applications

Crystals Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging when ordering. Confirm that the 18pF load capacitance matches the target circuit design requirements. Ensure the operating environment stays within the specified -40°C to +85°C range to maintain the stated frequency stability and aging characteristics. Check for any recent discontinuation notices or lifecycle changes directly from the manufacturer.

Crystals Selection Notes

Select this component when a surface mount solution is required for 12.288 MHz timing. The 18pF load capacitance must align with the oscillator circuit's external capacitor values. Consider the 70Ω maximum series resistance for drive level compatibility. The short HC-49/UP form factor offers space savings compared to standard through-hole variants while maintaining similar electrical performance profiles.

Crystals Part Context

This part belongs to the Ecliptek E1S series of short HC-49/UP surface mount crystals. These components are designed as direct replacements for traditional through-hole crystals in modern PCB layouts. The series emphasizes compactness and reliability for mass production environments, offering consistent performance across various consumer and industrial electronics applications.

Crystals Replacement Considerations

Compatible substitutes include other 12.288 MHz SMD crystals with 18pF load capacitance and similar physical dimensions. Verify that alternative parts meet the same ±15ppm initial tolerance and 5ppm/year aging specifications. Ensure the replacement supports the required -40°C to +85°C temperature range and utilizes compatible mounting pads.