E1SJA18-7.3728M TR

Crystals Overview

The E1SJA18-7.3728M TR is a surface-mount crystal manufactured by Ecliptek, operating at a fundamental frequency of 7.3728 MHz. It features a load capacitance of 18 pF and a frequency tolerance of ±15 ppm, with stability rated at ±30 ppm. The component utilizes an HC-49/US package, measuring 11.60 mm in length, 4.85 mm in width, and up to 3.20 mm in height. It exhibits an equivalent series resistance (ESR) of 120 Ohms and operates within a temperature range of -40°C to +85°C. Packaged in tape and reel for automated assembly, it complies with RoHS3 standards.

Crystals Feature Summary

• Fundamental mode operation for precise timing applications
• Surface mount design compatible with automated pick-and-place processes
• Compliant with RoHS3 environmental regulations

Crystals Applications

• Microcontroller clock sources
• Communication interface timing circuits
• Digital signal processing systems

Crystals Procurement Notes

Verify the specific suffix and packaging configuration when ordering, as distribution channels may list variations such as cut tape or full reels. Confirm that the supplier provides official datasheets matching the E1SJA18-7.3728M TR designation to ensure compatibility with HC-49/US footprints. Cross-reference manufacturer part numbers against distributor identifiers to avoid substitution errors during procurement.

Crystals Selection Notes

Select this component when a 7.3728 MHz reference is required for serial communication protocols like RS-232 or UART. Ensure the circuit design accommodates the 18 pF load capacitance to maintain frequency accuracy. Verify that the PCB layout supports the HC-49/US surface mount footprint dimensions. Consider the 120 Ohm ESR value when designing oscillator circuits to guarantee stable startup conditions.

Crystals Part Context

This part belongs to the E1S Series of crystals from Ecliptek, designed for general-purpose timing needs. It serves as a surface-mount alternative to through-hole variants, offering similar electrical characteristics in a compact form factor. The series is widely used in consumer electronics and industrial control systems requiring reliable clock generation.

Crystals Replacement Considerations

Direct substitutes must match the 7.3728 MHz frequency, 18 pF load capacitance, and HC-49/US package. Verify that any replacement maintains the same ±15 ppm tolerance and 120 Ohm ESR specifications to ensure circuit compatibility.