E1SJA18-25.000M TR

Crystals Overview

The E1SJA18-25.000M TR is a quartz crystal resonator from the Ecliptek E1S series, designed for surface mount applications. It operates at a nominal frequency of 25.000 MHz with a load capacitance of 18 pF. The component features a parallel resonant mode of operation using an AT-cut fundamental vibration. Frequency tolerance is specified at ±15 ppm at 25°C and ±30 ppm over the operating temperature range of -40°C to +85°C. Aging stability is limited to a maximum of 5 ppm per year. The equivalent series resistance (ESR) is 40 ohms maximum, with a drive level of 1 mWatt maximum. The package is an SMD HC-49/UP Short variant, measuring 13.3 mm in length, 4.85 mm in width, and 3.2 mm in height.

Crystals Feature Summary

• Surface mount construction utilizing HC-49/UP short package geometry for compact circuit integration.
• Metal resistance weld seal providing environmental protection and mechanical stability.
• AT-cut fundamental mode operation ensuring precise frequency control and low phase noise characteristics.

Crystals Applications

• Clock generation circuits for microprocessors and microcontrollers
• Timing references for communication interfaces such as UART and SPI
• Frequency synthesis in wireless transceivers and RF modules

Crystals Procurement Notes

Verify that the specific part number suffix matches the required load capacitance and frequency tolerance for your design. Confirm RoHS compliance status if restricted substances are prohibited in your manufacturing process. Ensure the surface mount footprint aligns with your PCB layout specifications, particularly the HC-49/UP short dimensions. Check for any recent product change notifications regarding material or packaging updates.

Crystals Selection Notes

Select this component when a standard 25 MHz reference is required for digital logic timing. The 18 pF load capacitance must match the oscillator circuit design to achieve the specified frequency accuracy. Consider the operating temperature range of -40°C to +85°C for industrial or commercial environments. The 40 ohm ESR limit should be compatible with the driving capability of the host oscillator circuit.

Crystals Part Context

This part belongs to the Ecliptek E1S series of quartz crystals, which offers various frequencies and packages. It is functionally similar to other HC-49/US and HC-49/UP surface mount crystals but distinguished by its specific electrical parameters and package height. The 'TR' suffix indicates tape and reel packaging for automated assembly processes.

Crystals Replacement Considerations

Direct substitutes include E1SGA18-25.000M TR and EA2532QA18-25.000M TR, though package dimensions differ. Verify pinout compatibility and electrical parameters before substitution. Cross-reference with Abracon equivalents if supply chain constraints require alternative sourcing.