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4.9 x 1.8mm SMD Tuning Fork K255 (former FX255) DATASHEET © Copyright 2019 Fox Electronics. All ri ghts reserved Title / Description: K255 STANDARD SPECIFICATIONS Drawing Number: K255-DOC-1 Size: A Part Number: Cage: 61429 Draftsperson: MAJ Approved: BEC Revision Date: 10/21/2019 STANDARD SPECIFICATIONS PARAMETERS MAX (unless otherwise noted) Frequency 32.768 kHz Frequency Tolerance @ 25ºC ±20 PPM Frequency Stability (Temperature Coefficient) -0.04 PPM / (∆ºC)2 Temperature Range Turnover (T O) Operating (T OPR) Storage (T STG) +20ºC ~ +30ºC -40°C ~ +85°C -55ºC ~ +125ºC Equivalent Series Resistance (RS) 70 kΩ Max Load Capacitance (C L) (See options on page 2) Insulation Resistance @ 100VDC 500MΩ Min Drive Level 1.0 µW 0.1 µW Typ Aging per year ±3 PPM Maximum Soldering Temp / Time 260ºC / 10 Seconds x2 Moisture Sensitivity Level (MSL) 1 Termination Finish Au over Ni Seal Method Au/Sn Lead (Pb) Free Yes RoHS/Reach Compliant Yes Temperature Coefficient ‐180 ‐160 ‐140 ‐120 ‐100 ‐80 ‐60 ‐40 ‐20 ‐ 4 0 ‐ 3 0 ‐ 2 0 ‐ 1 00 1 02 03 04 05 06 07 08 0 ppm Page 1 of 2 Mechanical / Dimensions (millimeters): Note: Dimensional drawing is for reference to critical specifications defined by size measurements. Certain non-critical visual attributes, such as side castellations, etc. may vary.

4.9 x 1.8mm SMD Tuning Fork K255 (former FX255) DATASHEET © Copyright 2019 Fox Electronics. All ri ghts reserved Title / Description: K255 STANDARD SPECIFICATIONS Drawing Number: K255-DOC-1 Size: A Part Number: Cage: 61429 Draftsperson: MAJ Approved: BEC Revision Date: 10/21/2019

  • TAPE SPECIFICATIONS (millimeters) A B C D E F Reel QTY Available Options & Part Identification for SMD Tuning Fork Crystal K255 F K255 E I H M 0.032768 F K255 E I H M 0.032768 FOX Model Number Tolerance E = ±20ppm Stability I =-0.04 PPM / (ºC)2 Load Capacitance V=7pF W=9pF H=12.5pF Operating Temperature M = -40 ~ +85 °C Frequency (MHz) Page 2 of 2 Corporate Headquarters

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Fort Myers, FL 33905 http://www.FOXONLINE.com Sales 1-239-693-0099 http://www.FOXONLINE.com/repdisty Tech Support http://www.FOXONLINE.com/email PRODUCT USE: Fox Electronics reserves the right to modify the products and/or specifications described herein at any time and at Fox Electronics' sole discretion. All information in this document, including descriptions of product features and performance, is subject to change without notice. Performance specifications and the operating parameters of the described products are determined in the independent state and are not guaranteed to perform the same way when installed in customer products. The information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of Fox Electronics' products for any particular purpose, an implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property rights of Fox Electronics or any third parties. Fox Electronics' products are not intended for use in applications involving extreme environmental conditions or in life support systems or similar devices where the failure or malfunction of a Fox Electronics product can be reasonably expected to significantly affect the health or safety of users. Anyone using a Fox Electronics product in such a manner does so at their own risk, absent an express, written agreement by Fox Electronics. Fox Electronics and the Fox logo are registered trademarks of Fox Electronics. Product specification is subject to change without notice. Other trademarks and service marks used herein, including protected names, logos and designs, are the property of Fox Electronics or their respective third party owners. For datasheet type definitions and a glossary of common terms, visit http://www.foxonline.com/tgcrystals.html.

  • REEL SPECIFICATIONS (millimeters) G H I J K L M 2.0 13 21 60 180 13.0 2.0