E1SJA18-16.9344M TR

Crystals Overview

The E1SJA18-16.9344M TR is a quartz crystal resonator from the Ecliptek E1S series, designed for surface mount applications. It operates at a nominal frequency of 16.9344 MHz using an AT-cut fundamental mode. The component features a parallel resonant configuration with a load capacitance of 18 pF and a shunt capacitance (C0) of 5.0 pF. Electrical specifications include a maximum equivalent series resistance (ESR) of 50 ohms and a drive level of 1 mW. Frequency tolerance is ±15 ppm at 25°C and ±30 ppm over the operating temperature range of -40°C to +85°C. Aging is limited to ±5 ppm per year. The package is a short HC-49/UP SMD with dimensions of 13.3 mm length, 4.85 mm width, and 3.2 mm height, utilizing a resistance welded metal seal.

Crystals Feature Summary

• Surface mount construction with a short HC-49/UP package and resistance welded metal seal for environmental protection.
• AT-cut fundamental mode operation ensuring stable parallel resonance characteristics.
• Compliance with RoHS directives and REACH regulations for lead-free manufacturing.

Crystals Applications

• Microcontroller clock generation circuits
• Communication interface timing references
• Industrial control system oscillators

Crystals Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging when ordering. Confirm that the 18 pF load capacitance matches the target circuit design requirements. Ensure the operating environment stays within the specified -40°C to +85°C range to maintain the stated frequency stability. Check for any updated compliance certificates if required for specific regional certifications.

Crystals Selection Notes

Select this component when a standard 16.9344 MHz frequency is required for serial communication baud rates or microcontroller clocks. The 18 pF load capacitance is common for many MCU oscillator pins; verify external capacitor values accordingly. The ±15 ppm initial tolerance is suitable for general-purpose digital logic. Consider the 50 ohm ESR limit to ensure compatibility with the driving gate's output impedance.

Crystals Part Context

This part belongs to the Ecliptek E1S series of short body surface mount crystals. These components are designed as drop-in replacements for traditional through-hole HC-49/U crystals in space-constrained PCB layouts. The series offers various frequencies and tolerances, with this specific model providing a widely used frequency for data communication standards.

Crystals Replacement Considerations

Direct substitutes may include other manufacturers' short HC-49/UP SMD crystals with identical 16.9344 MHz frequency, 18 pF load capacitance, and ±15 ppm tolerance. Verify pinout compatibility and physical dimensions (13.3 x 4.85 x 3.2 mm) before substitution. Ensure the replacement also meets the same thermal and electrical specifications.