E1SFA18-25.000M TR

Crystals Overview

The E1SFA18-25.000M TR is a surface-mount quartz crystal resonator manufactured by Ecliptek, operating at a nominal frequency of 25.000 MHz. It utilizes an HC-49/US package with two pins and features a load capacitance of 18 pF. The component offers a frequency tolerance of ±30 ppm and a stability of ±50 ppm over the operating temperature range of -40°C to +85°C. Key electrical specifications include a maximum equivalent series resistance (ESR) of 40 Ohms and a drive level of 1 mWatt. The device supports parallel resonant mode operation and meets RoHS compliance standards.

Crystals Feature Summary

• Surface-mount construction in a compact HC-49/US package for automated assembly
• AT-cut fundamental mode operation ensuring stable frequency generation
• RoHS compliant lead-free manufacturing process

Crystals Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for microcontrollers and digital logic circuits
• Communication interface modules requiring precise frequency synchronization

Crystals Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when sourcing from distributors. Confirm that the manufacturer designation aligns with Ecliptek or Abracon as historical branding may vary. Ensure the order quantity matches standard factory pack sizes if bulk procurement is required. Cross-reference the datasheet version to confirm current environmental compliance status before finalizing purchase orders.

Crystals Selection Notes

Select this component when a 25 MHz surface-mount crystal with HC-49/US form factor is required. The 18 pF load capacitance must match the oscillator circuit design parameters. Verify that the ±30 ppm tolerance and ±50 ppm stability meet the system timing requirements across the -40°C to +85°C industrial temperature range. Consider the 40 Ohm ESR limit to ensure adequate drive level compatibility with the host oscillator.

Crystals Part Context

This part belongs to the E1S series of quartz crystals from Ecliptek, designed for general frequency control applications. The series provides various frequency options within the HC-49/US surface-mount package. It serves as a passive frequency-determining element in electronic circuits, replacing through-hole variants to support modern PCB density requirements while maintaining established mechanical dimensions.

Crystals Replacement Considerations

Direct substitutes include other 25 MHz HC-49/US SMD crystals with matching 18 pF load capacitance and similar ESR limits. Verify that alternative parts maintain the same operating temperature range and frequency stability specifications. Check for pin-compatible packages and identical mounting dimensions to ensure seamless integration without PCB redesign.