Equivalent Series Resistance is the effective resistive component in series with the LC model of the crystal itself.

A typical range is 25Ω to 100Ω for most crystals. While oscillator circuits can tolerate some degree of series resistance, excessive crystal series resistance can lead to oscillator startup failure. So, sufficient margin must be built into the oscillator design.

The exception to the above guidelines are 32.768 kHz watch crystals, where ESR can range from 40~70k Ohms Typical.

For help with determining the right crystal for your application please contact ECS, Inc. Tech Support or visit our web site for helpful tools like our Parametric Search and Part Number Builder.

Watch the above video to learn more about Equivalent Series Resistance then click on the button below to start searching for the exact part you need!




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Please contact us if you need additional information or have a specific requirement in your application.
ECS, Inc. International
15351 West 109th Street
Lenexa, KS 66219

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Equivalent Series Resistance was last modified: June 30th, 2022 by ECS Inc.