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.NC7WB3125 2-Bit Low Power Bus Switch May 2000 Revised December 2005 NC7WB3125 2-Bit Low Power Bus Switch General Description Features The NC7WB3125 is a 2-bit ultra high-speed CMOS FET bus Space saving US8 surface mount package switch with TTL-compatible active LOW control inputs. The low MicroPak Pb-Free leadless package On Resistance of the switch allows inputs to be connected to outputs with minimal propagation delay and without generating Typical 3 switch resistance at 5.0V V CC additional ground bounce noise. The device is organized as a 2- Minimal propagation delay through the switch bit switch with independent bus enable (OE) controls. When OE is LOW, the switch is ON and Port A is connected to Port B. Power down high impedance input/output When OE is HIGH, the switch is OPEN and a high-impedance Zero bounce in flow through mode state exists between the two ports. Control inputs tolerate volt- ages up to 5.5V independent of V . TTL compatible active LOW control inputs CC Control inputs are overvoltage tolerant Bus switch replacement for Logic x125 part Ordering Code: Product Order Package Code Package Description Supplied As Number Number Top Mark NC7WB3125K8X MAB08A WB25 8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide 3k Units on Tape and Reel NC7WB3125L8X MAC08A T4 Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5k Units on Tape and Reel (Preliminary) Pb-Free package per JEDEC J-STD-020B. MircoPak is a trademark of Fairchild Semiconductor Corporation. 2005 Fairchild Semiconductor Corporation DS500376 www.fairchildsemi.com