E1SHA18-12.000M TR

Crystals Overview

The E1SHA18-12.000M TR is a 12.000 MHz AT-cut fundamental mode quartz crystal resonator manufactured by Ecliptek. It operates in parallel resonance with a load capacitance of 18pF and offers a frequency tolerance of ±15ppm at 25°C, with stability of ±30ppm over the operating range. The device features a maximum equivalent series resistance (ESR) of 70 Ohms and supports a maximum drive level of 1mWatt. It is housed in a surface-mount package measuring 13.3 mm x 4.85 mm with a height of 3.2 mm. The component is designed for operation between -20°C and +70°C, with a storage temperature range of -55°C to +125°C.

Crystals Feature Summary

• AT-cut fundamental mode construction ensures stable oscillation without requiring additional harmonic filtering circuits.
• Surface-mount HC-49/UP short form factor enables automated placement and reduced PCB footprint.
• Metal resistance weld seal provides environmental protection against moisture and mechanical shock.

Crystals Applications

• Microcontroller unit (MCU) clock sources
• Communication interface timing circuits
• Consumer electronic device oscillators

Crystals Procurement Notes

Verify the specific suffix and manufacturer designation upon ordering, as Ecliptek products are often distributed under Abracon branding. Confirm that the requested variant matches the required operating temperature range of -20°C to +70°C. Ensure compatibility with standard SMD reflow profiles and check for any recent end-of-life notifications from the supplier before finalizing procurement plans.

Crystals Selection Notes

Select this component when a 12MHz reference is required for space-constrained designs utilizing the HC-49/UP short SMD footprint. The 18pF load capacitance aligns with common MCU oscillator configurations. Consider the ±15ppm initial tolerance and ±30ppm total stability for applications where moderate frequency accuracy is sufficient. Verify that the 70 Ohm ESR limit is compatible with the target oscillator circuit's drive requirements.

Crystals Part Context

This part belongs to the E1SHA series of surface-mount quartz crystals. It serves as a direct replacement for through-hole HC-49/U crystals in modern PCB layouts. The product line is standardized for industrial and consumer electronics, offering a balance between cost-effectiveness and reliable performance for general-purpose timing applications.

Crystals Replacement Considerations

Direct substitutes include the EA3560JA18-12.000M TR from the same manufacturer family. Cross-reference with other 12MHz 18pF SMD crystals in the HC-49/UP short package, ensuring identical electrical parameters such as ESR and drive level limits are met.

Crystals FAQ

What is the mode of operation for this crystal?

The E1SHA18-12.000M TR operates in parallel resonance mode using an AT-cut fundamental frequency.

Does this component require external filtering for harmonic suppression?

No, the AT-cut fundamental mode design eliminates the need for additional harmonic filtering circuits typically required by overtone crystals.