E1SJA18-30.000M TR

Crystals Overview

The E1SJA18-30.000M TR is a surface-mount quartz crystal resonator from the Ecliptek E1S series, designed for precision frequency control applications. It operates at a nominal frequency of 30.000 MHz with a parallel resonant mode of operation. The component features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 40 Ohms. Frequency stability is specified at ±15 ppm at 25°C and ±30 ppm over the operating temperature range of -40°C to +85°C. Aging performance is rated at ±5 ppm per year maximum. The device utilizes a metal resistance weld seal construction within an SMD HC-49/UP Short package measuring 13.3 mm in length and 4.85 mm in width.

Crystals Feature Summary

• Utilizes metal resistance weld seal construction for hermetic protection
• Supports parallel resonant mode operation for stable frequency generation
• Provides high frequency stability with low aging rates over extended periods

Crystals Applications

• General purpose clock signal generation in electronic circuits
• Frequency reference sources for microcontroller systems
• Timing components in communication equipment requiring 30 MHz stability

Crystals Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability variations. Confirm that the specific suffix 'TR' corresponds to the tape and reel packaging format required for automated assembly processes. Ensure that the operating temperature range of -40°C to +85°C aligns with the environmental conditions of the target application to maintain the specified ±30 ppm frequency tolerance. Cross-reference the datasheet for any recent product discontinuation notices or lifecycle changes.

Crystals Selection Notes

Select this component when a 30 MHz parallel resonant frequency is required with strict stability limits of ±15 ppm at room temperature. The 18 pF load capacitance must match the oscillator circuit design specifications to ensure accurate frequency output. Consider the HC-49/UP Short SMD footprint for board space constraints while maintaining the robustness of a welded metal case. Evaluate the ±5 ppm/year aging rate against long-term system accuracy requirements.

Crystals Part Context

This part belongs to the Ecliptek E1S series of surface-mount quartz crystals. The series offers various frequency options within the same physical package dimensions, allowing for design flexibility across different product lines. The E1SJA18 variant specifically denotes the 18 pF load capacitance configuration, which is a common standard for many microcontroller and logic oscillator circuits.

Crystals Replacement Considerations

Direct substitutes must match the 30 MHz frequency, 18 pF load capacitance, and HC-49/UP SMD package dimensions. Verify that alternative manufacturers provide comparable ±15 ppm initial tolerance and ±30 ppm total stability over the -40°C to +85°C range. Ensure the replacement part maintains the same ESR value of approximately 40 Ohms to prevent oscillator startup failures.