E1SJA18-15.000M TR

Crystals Overview

The E1SJA18-15.000M TR is a quartz crystal resonator manufactured by Ecliptek, designed for surface-mount applications in the HC-49/US package. It operates at a nominal frequency of 15.000 MHz with a parallel fundamental mode. The component features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 60 Ω. Frequency tolerance is ±15 ppm at 25°C, with stability specified as ±30 ppm over the operating temperature range of -40°C to +85°C. Aging is limited to a maximum of 5 ppm per year. The device supports a drive level of up to 1 mW and includes a metal resistance-welded seal.

Crystals Feature Summary

• Surface-mount construction utilizing the HC-49/US package format
• Metal resistance-welded seal for environmental protection
• AT-cut fundamental mode operation for stable resonance
• RoHS compliant and lead-free manufacturing

Crystals Applications

• Industrial gateway clock synchronization circuits
• Consumer electronic device timing references
• Communication equipment oscillator stages
• Microcontroller system clock generation

Crystals Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when sourcing. Confirm that the 15.000 MHz frequency aligns with circuit requirements, noting that similar models like E1SCA18-15.000M exist with different tolerances. Ensure compatibility with standard SMT reflow profiles, as the component is rated for MSL Level 1 processing without mandatory pre-baking.

Crystals Selection Notes

Select this model for designs requiring precise 15 MHz timing within industrial temperature ranges. The ±15 ppm tolerance suits high-precision applications compared to standard ±50 ppm variants. Verify that the 18 pF load capacitance matches the host oscillator circuit's input capacitance. Consider the 60 Ω ESR to ensure adequate drive margin for the connected microcontroller or logic gate.

Crystals Part Context

This component belongs to the E1S series from Ecliptek, which specializes in surface-mount crystals. The series covers frequencies from 3.579545 MHz to 50 MHz, offering various tolerance grades. The E1SJA18 variant specifically denotes the HC-49/US footprint with 18 pF load capacitance, distinguishing it from other series members with different packages or electrical characteristics.

Crystals Replacement Considerations

E1SCA18-15.000M offers identical frequency but lower ±50 ppm tolerance. E1SJA18-15.360M provides a different 15.36 MHz frequency option within the same package. Direct substitutes must match the HC-49/US form factor and 18 pF load capacitance to maintain circuit stability.