E1SJA18-3.579545M TR

Crystals Overview

The E1SJA18-3.579545M TR is a surface-mount quartz crystal resonator from the Ecliptek E1S series, housed in an HC-49/US package measuring 13.3mm x 4.85mm. It operates at a nominal frequency of 3.579545MHz with a load capacitance of 18pF and equivalent series resistance of 200 Ohms maximum. The component provides a frequency tolerance of ±15ppm at 25°C and stability of ±15ppm over the operating temperature range of -40°C to +85°C. It utilizes AT-cut fundamental mode operation with a maximum drive level of 1mWatt.

Crystals Feature Summary

• Surface mount construction in standard HC-49/US package for automated assembly
• AT-cut quartz element ensuring stable parallel resonant frequency characteristics
• Metal resistance weld seal providing environmental protection and hermetic integrity

Crystals Applications

• Microcontroller clock sources requiring precise timing
• Communication systems utilizing 3.579545MHz carrier frequencies
• Industrial control equipment operating in extended temperature ranges

Crystals Procurement Notes

Verify that the ordering suffix matches the required temperature grade and tolerance specifications. Confirm RoHS compliance status and SVHC declarations against current regulatory requirements. Ensure the reel quantity aligns with production needs. Cross-reference the manufacturer part number with distributor catalogs to confirm availability and lead times before finalizing procurement orders.

Crystals Selection Notes

Select this component when a 3.579545MHz reference is required in a surface-mount form factor. The HC-49/US package offers a balance between performance and board space efficiency compared to larger through-hole variants. Consider the ±15ppm stability requirement against system jitter budgets. Verify that the 18pF load capacitance matches the oscillator circuit design parameters for accurate frequency tuning.

Crystals Part Context

This part belongs to the Ecliptek E1S series of surface-mount crystals. The series focuses on providing quick-turn programmable options and standard frequencies for timing applications. The brand specializes in eliminating long lead times associated with traditional crystal manufacturing processes, offering both MEMS oscillators and quartz resonators.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC-49/US SMD crystals with identical 3.579545MHz frequency, 18pF load capacitance, and ±15ppm stability. Verify mechanical footprint compatibility and electrical parameters such as ESR and drive level before substitution.