Is Now Part of To learn more about ON Semiconductor, please visit our website at www.onsemi.com Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers will need to change in order to meet ON Semiconductors system requirements. Since the ON Semiconductor product management systems do not have the ability to manage part nomenclature that utilizes an underscore ( ), the underscore ( ) in the Fairchild part numbers will be changed to a dash (-). This document may contain device numbers with an underscore ( ). Please check the ON Semiconductor website to verify the updated device numbers. The most current and up-to-date ordering information can be found at www.onsemi.com. Please email any questions regarding the system integration to Fairchild questions onsemi.com. ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductors product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. Typical parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customers technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.FSA1156, FSA1157 Low-R , Low-Voltage, SPST Analog Switch ON January 2016 FSA1156, FSA1157 Low-R , Low-Voltage SPST Analog Switch ON Features Description The FSA1156 and FSA1157 are high-performance Maximum 0.95 R for 4.5V Supply at 25C ON Single-Pole / Single-Throw (SPST) analog switches. 0.3 Maximum RON Flatness at 4.5V Supply The devices feature ultra-low R of 0.75 (typical) ON and operate over a wide V range of 1.65 V to 5.5 V. CC Broad V Operating Range: 1.65V to 5.5v CC The devices are fabricated with sub-micron CMOS Fast Turn-On and Turn-Off Time technology to achieve fast switching speeds. The select input is TTL-level compatible. The FSA1156 has Over-Voltage Tolerant, TTL-Compatible Control normally open operation the FSA1157 has normally Input closed operation. Available in space-saving 6-lead, MicroPak and SC70 Packages Ordering Information Part Number Top Mark Package Description Packing Method FSA1156P6X 156 6-Lead SC70, EIAJ SC88, 1.25mm Wide 3000 Units Tape and Reel FSA1156L6X EH 6-Lead MicroPak, 1.0mm Wide 5000 Units Tape and Reel FSA1157P6X 157 6-Lead SC70, EIAJ SC88, 1.25mm Wide 3000 Units Tape and Reel FSA1157L6X EJ 6-Lead MicroPak, 1.0mm Wide 5000 Units Tape and Reel 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA1156 FSA1157 Rev. 1.9