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 Semiconductor’s 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 Semiconductor’s 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 customer’s 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.

N May 2000 C Revised December 2005 7 W B 3 1 NC7WB3125 2 5 2 2-Bit Low Power Bus Switch - B i t L o w General Description Features P The NC7WB3125 is a 2-bit ultra high-speed CMOS FET bus (cid:0)Space saving US8 surface mount package o w switch with TTL-compatible active LOW control inputs. The low (cid:0)MicroPak(cid:0) Pb-Free leadless package e On Resistance of the switch allows inputs to be connected to r outputs with minimal propagation delay and without generating (cid:0)Typical 3(cid:2) switch resistance at 5.0V V B CC additional ground bounce noise. The device is organized as a 2- u (cid:0)Minimal propagation delay through the switch s bit switch with independent bus enable (OE) controls. When OE S is LOW, the switch is ON and Port A is connected to Port B. (cid:0)Power down high impedance input/output w When OE is HIGH, the switch is OPEN and a high-impedance (cid:0)Zero bounce in flow through mode it state exists between the two ports. Control inputs tolerate volt- c ages up to 5.5V independent of V . (cid:0)TTL compatible active LOW control inputs h CC (cid:0)Control inputs are overvoltage tolerant (cid:0)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(cid:0) is a trademark of Fairchild Semiconductor Corporation. © 2005 Fairchild Semiconductor Corporation DS500376 www.fairchildsemi.com

5 2 1 Logic Diagram Connection Diagrams 3 B W 7 C N (Top View) Pin Descriptions Pin One Orientation Diagram Pin Name Description A Bus A B Bus B OE Bus Enable Input Function Table AAA represents Product Code Top Mark - see ordering code Bus Enable Input OE Function Note: Orientation of Top Mark determines Pin One location. Read the top product L B Connected to A code mark left to right, Pin One is the lower left pin (see diagram). H Disconnected Pad Assignments for MicroPak (Top Through View) www.fairchildsemi.com 2

N C Absolute Maximum Ratings(Note 1) Recommended Operating 7 W Conditions (Note 3) B Supply Voltage (VCC) (cid:3)0.5V to (cid:4)7.0V 3 DC Switch Voltage (V ) (cid:3)0.5V to (cid:4)7.0V 1 S Supply Operating (V ) 4.0V to 5.5V 2 DC Output Voltage (V ) (Note 2) (cid:3)0.5V to (cid:4)7.0V CC 5 IN Control Input Voltage (V ) 0V to 5.5V IN DC Input Diode Current Switch Input Voltage (V ) 0V to 5.5V (I ) V (cid:5) 0V (cid:3)50 mA IN IK IN Output Voltage (V ) 0V to 5.5V OUT DC Output (I ) Current 128 mA OUT Operating Temperature (T ) (cid:3)40(cid:7)C to (cid:4)85(cid:7)C A DC V or Ground Current CC Input Rise and Fall Time (t, t) (I /I ) (cid:6)100 mA r f CC GND Switch Control Input 0 ns/V to 5 ns Storage Temperature Range (T ) (cid:3)65(cid:7)C to (cid:4)150(cid:7)C STG Switch I/O 0 ns/V to DC Junction Temperature under Bias (T ) (cid:4)150(cid:7)C J Thermal Resistance ((cid:8) ) 250(cid:7)C/W JA Junction Lead Temperature (T ) L (Soldering, 10 Seconds) (cid:4)260(cid:7)C Power Dissipation (P ) @ (cid:4)85(cid:7)C 250 mW D Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these lim- its. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Condi- tions” table will define the conditions for actual device operation. Note 2: The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. Note 3: Unused logic inputs must be held HIGH or LOW. They may not float. DC Electrical Characteristics VCC TA (cid:2) (cid:3)40(cid:4)C to (cid:5)85(cid:4)C Symbol Parameter Units Conditions (V) Min Typ Max VIK Clamp Diode Voltage 4.5 (cid:3)1.2 V IIN (cid:2) (cid:3)18 mA VIH HIGH Level Input Voltage 4.0 to 5.5 2.0 V VIL LOW Level Input Voltage 4.0 to 5.5 0.8 V VOH HIGH Level Output Voltage 4.0 to 5.5 See Figure 3 V VIN (cid:2) VCC IIN Input Leakage Current 5.5 (cid:6)1.0 (cid:7)A 0 (cid:8) VIN (cid:8) 5.5V IOFF Switch OFF Leakage Current 5.5 (cid:6)1.0 (cid:7)A 0 (cid:8) A, B (cid:8) VCC RON Switch On Resistance 4.5 3.0 7.0 VIN (cid:2) 0V, IIN (cid:2) 64 mA (Note 4) 4.5 3.0 7.0 (cid:9) VIN (cid:2) 0V, IIN (cid:2) 30 mA 4.5 6.0 15.0 VIN (cid:2) 2.4V, IIN (cid:2) 15 mA 4.0 10.0 20.0 VIN (cid:2) 2.4V, IIN (cid:2) 15 mA ICC Quiescent Supply Current 5.5 3.0 (cid:7)A VIN (cid:2) VCC or GND IOUT (cid:2) 0 (cid:10) ICC Increase in ICC per Input (Note 5) 5.5 1.0 2.5 mA VIN (cid:2) 3.4V, One OE Input only, Other OE (cid:2) VCC Note 4: Measured by the voltage drop between A and B pins at the indicated current through the switch. On Resistance is determined by the lower of the voltages on the two (A or B) pins. Note 5: Per TTL driven input (VIN (cid:2) 3.4V, control input only). A and B pins do not contribute to ICC. 3 www.fairchildsemi.com

5 2 1 AC Electrical Characteristics 3 B W 7 TA (cid:2) (cid:3)40(cid:4)C to (cid:5)85(cid:4)C, C Symbol Parameter VCC CL (cid:2) 50 pF, RU (cid:2) RD (cid:2) 500(cid:9) Units Conditions Figure N (V) Min Typ Max Number tPHL, Propagation Delay Bus-to-Bus 4.0 to 5.5 0.25 ns VI (cid:2) OPEN Figures tPLH (Note 6) 1, 2 ttPPZZLH, Output Enable Time 4.5 4to.0 5.5 00..88 23..50 44..26 ns VVII (cid:2)(cid:2) 70VV ffoorr ttPPZZLH Fig1,u r2es ttPPHLZZ, Output Disable Time 4.5 4to.0 5.5 00..88 32..19 44..84 ns VVII (cid:2)(cid:2) 70VV ffoorr ttPPHLZZ 1FFiigguurrees 2 Note 6: This parameter is guaranteed by design. The bus switch contributes no propagation delay other than the RC delay of the typical On Resistance of the switch and the 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance). The specified limit is calculated on this basis. Capacitance Symbol Parameter Typ Max Units Conditions CIN Control Pin Input Capacitance 2.5 pF VCC (cid:2) 0V CI/O (OFF) Port Off Capacitance 6.0 pF VCC (cid:2) 5.0V (cid:2) OE CI/O (ON) Switch ON Capacitance 12.0 pF VCC (cid:2) 5.0V, OE (cid:2) 0V AC Loading and Waveforms Input driven by 50(cid:9) source terminated in 50(cid:9) CL includes load and stray capacitance Input PRR (cid:2) 1.0 MHz; tW (cid:2) 500 ns FIGURE 1. AC Test Circuit FIGURE 2. AC Waveforms www.fairchildsemi.com 4

N C DC Characteristics 7 W B 3 1 2 5 FIGURE 3. Typical High Level Output Voltage vs. Supply Voltage 5 www.fairchildsemi.com

5 2 1 Tape and Reel Specification 3 B W TAPE FORMAT for US8 7 Package Tape Number Cavity Cover Tape C N Designator Section Cavities Status Status Leader (Start End) 125 (typ) Empty Sealed K8X Carrier 250 Filled Sealed Trailer (Hub End) 75 (typ) Empty Sealed TAPE DIMENSIONS inches (millimeters) TAPE FORMAT for MicroPak Package Tape Number Cavity Cover Tape Designator Section Cavities Status Status Leader (Start End) 125 (typ) Empty Sealed L8X Carrier 250 Filled Sealed Trailer (Hub End) 75 (typ) Empty Sealed TAPE DIMENSIONS inches (millimeters) www.fairchildsemi.com 6

N C 7 W REEL DIMENSIONS inches (millimeters) B 3 1 2 5 Tape Size A B C D N W1 W2 W3 7.0 0.059 0.512 0.795 2.165 0.331 (cid:4) 0.059/(cid:3)0.000 0.567 W1 (cid:4) 0.078/(cid:3)0.039 8 mm (177.8) (1.50) (13.00) (20.20) (55.00) (8.40 (cid:4) 1.50/(cid:3)0.00) (14.40) (W1 (cid:4) 2.00/(cid:3)1.00) 7 www.fairchildsemi.com

5 2 1 Physical Dimensions 3 inches (millimeters) unless otherwise noted B W 7 C N 8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide Package Number MAB08A www.fairchildsemi.com 8

N C Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 7 W B 3 1 2 5 Pb-Free 8-Lead MicroPak, 1.6 mm Wide Package Number MAC08A 9 www.fairchildsemi.com

h c t i w S s u B r e w o P w o L t i B - 2 5 2 1 3 B W 7 C N DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION As used herein: provided in the labeling, can be reasonably expected to 1. Life support devices or systems are devices or systems result in significant injury to the user. which, (a) are intended for surgical implant into the body, or 2. A critical component is any component of a life support (b) support or sustain life, or (c) whose failure to perform device or system whose failure to perform can be reason- when properly used in accordance with instructions for use ably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of terms Datasheet Identification Product Status Definition Advance Information Formative or InDesign This datasheet contains the design specifications for product develop- ment. Specifications may change in any manner without notice. Preliminary First Production This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Obsolete Not In Production This datasheet contains specifications on a product that has been dis- continued by Fairchild Semiconductor. The datasheet is printed for ref- erence information only. www.fairchildsemi.com 10

ON Semiconductor and 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 Semiconductor’s 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 customer’s 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. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: N. American Technical Support: 800−282−9855 Toll Free ON Semiconductor Website: www.onsemi.com Literature Distribution Center for ON Semiconductor USA/Canada 19521 E. 32nd Pkwy, Aurora, Colorado 80011 USA Europe, Middle East and Africa Technical Support: Order Literature: http://www.onsemi.com/orderlit Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Phone: 421 33 790 2910 Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Japan Customer Focus Center For additional information, please contact your local Email: orderlit@onsemi.com Phone: 81−3−5817−1050 Sales Representative © Semiconductor Components Industries, LLC www.onsemi.com www.onsemi.com 1

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