E1SJA18-27.000M TR

Crystals Overview

The E1SJA18-27.000M TR is a surface-mount quartz crystal resonator manufactured by Ecliptek. It operates at a nominal frequency of 27 MHz with a load capacitance of 18 pF. The component exhibits a frequency tolerance of ±15 ppm at 25°C and stability of ±30 ppm over the operating temperature range. It features an equivalent series resistance (ESR) of 40 Ohms maximum and aging of ±5 ppm per year maximum. The device utilizes AT-cut fundamental mode operation with a drive level of 1 mWatt maximum. It is housed in an HC-49/US SMD package measuring 11.60mm x 4.85mm x 3.20mm.

Crystals Feature Summary

• Surface mount construction using HC-49/US package format
• AT-cut fundamental resonance mode for stable frequency generation
• Metal resistance weld seal providing environmental protection
• Parallel resonant configuration with 18pF load capacitance

Crystals Applications

• Embedded system clock sources
• Industrial automation control circuits
• Microprocessor timing references

Crystals Procurement Notes

Verify current availability status as distribution channels may vary. Confirm package orientation and pin compatibility during integration. Ensure storage conditions meet moisture sensitivity level requirements prior to soldering. Review regulatory compliance documentation for specific regional standards adherence before final procurement authorization.

Crystals Selection Notes

Select this component when a 27 MHz reference signal is required in space-constrained designs. The HC-49/US form factor allows for standard surface mount assembly processes. Consider the ±30 ppm stability specification against system timing budget requirements. Evaluate the 40 Ohm ESR limit for oscillator circuit loading constraints.

Crystals Part Context

This part belongs to the E1S series of quartz crystal resonators from Ecliptek. These components are designed for general-purpose timing applications requiring reliable frequency stability. The series offers various frequency options within standardized surface mount packages to support diverse electronic design needs.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC-49/US 27 MHz crystals with matching 18pF load capacitance and similar ESR specifications. Verify mechanical dimensions and electrical parameters such as aging rate and stability ranges before cross-referencing.