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.

7 4 November 1988 A Revised July 2003 C 1 3 8 74AC138 (cid:127) 74ACT138 • 7 4 1-of-8 Decoder/Demultiplexer A C T 1 General Description Features 3 8 The AC/ACT138 is a high-speed 1-of-8 decoder/demulti- (cid:1) ICC reduced by 50% 1 plexer. This device is ideally suited for high-speed bipolar (cid:1) Demultiplexing capability -o memory chip select address decoding. The multiple input f enables allow parallel expansion to a 1-of-24 decoder (cid:1) Multiple input enable for easy expansion -8 using just three AC/ACT138 devices or a 1-of-32 decoder (cid:1) Active LOW mutually exclusive outputs D using four AC/ACT138 devices and one inverter. (cid:1) Outputs source/sink 24 mA e c (cid:1) ACT138 has TTL-compatible inputs o d e r / Ordering Code: D e m Order Number Package Number Package Description u 74AC138SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow l t i 74AC138SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide p l 74AC138MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide e x 74AC138PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide e r 74ACT138SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow 74ACT138SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74ACT138PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Connection Diagram Logic Symbols IEEE/IEC Pin Descriptions Pin Names Description A0–A2 Address Inputs E1–E2 Enable Inputs E3 Enable Input O0–O7 Outputs FACT is a trademark of Fairchild Semiconductor Corporation. © 2003 Fairchild Semiconductor Corporation DS009925 www.fairchildsemi.com

8 3 1 T C Truth Table A 4 Inputs Outputs 7 (cid:127) E1 E2 E3 A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7 8 3 H X X X X X H H H H H H H H 1 X H X X X X H H H H H H H H C A X X L X X X H H H H H H H H 4 7 L L H L L L L H H H H H H H L L H H L L H L H H H H H H L L H L H L H H L H H H H H L L H H H L H H H L H H H H L L H L L H H H H H L H H H L L H H L H H H H H H L H H L L H L H H H H H H H H L H L L H H H H H H H H H H H L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Functional Description Logic Diagram The AC/ACT138 high-speed 1-of-8 decoder/demultiplexer accepts three binary weighted inputs (A0, A1, A2) and, when enabled, provides eight mutually exclusive active- LOW outputs (O0–O7). The AC/ACT138 features three Enable inputs, two active-LOW (E1, E2) and one active- HIGH (E3). All outputs will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four AC/ACT138 devices and one inverter (see Figure 1). The AC/ACT138 can be used as an 8-output demultiplexer by using one of the active LOW Enable inputs as the data input and the other Enable inputs as strobes. The Enable inputs which are not used must be permanently tied to their appropriate active-HIGH or active-LOW state. Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. FIGURE 1. Expansion to 1-of-32 Decoding www.fairchildsemi.com 2

7 Absolute Maximum Ratings Recommended Operating 4 (Note 1) A Conditions C Supply Voltage (VCC) −0.5V to +7.0V 1 DC Input Diode Current (IIK) Supply Voltage (VCC) 38 VVII == −V0C.C5 V+ 0.5V −+2200 mmAA AACCT 24..05VV ttoo 65..05VV (cid:127) 74 DC Input Voltage (VI) −0.5V to VCC + 0.5V Input Voltage (VI) 0V to VCC AC DC Output Diode Current (IOK) Output Voltage (VO) 0V to VCC T VO = −0.5V −20 mA Operating Temperature (TA) −40°C to +85°C 13 VO = VCC + 0.5V +20 mA Minimum Input Edge Rate (∆V/∆t) 8 DC Output Voltage (VO) −0.5V to VCC + 0.5V AC Devices DC Output Source VIN from 30% to 70% of VCC or Sink Current (IO) ±50 mA VCC @ 3.3V, 4.5V, 5.5V 125 mV/ns DC VCC or Ground Current Minimum Input Edge Rate (∆V/∆t) per Output Pin (ICC or IGND) ±50 mA ACT Devices Storage Temperature (TSTG) −65°C to +150°C VIN from 0.8V to 2.0V Junction Temperature (TJ) VCC @ 4.5V, 5.5V 125 mV/ns PDIP 140°C Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met, with- out exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation of FACT circuits outside databook specifications. DC Electrical Characteristics for AC VCC TA = +25°C TA = −40°C to +85°C Symbol Parameter Units Conditions (V) Typ Guaranteed Limits VIH Minimum HIGH Level 3.0 1.5 2.1 2.1 VOUT = 0.1V Input Voltage 4.5 2.25 3.15 3.15 V or VCC − 0.1V 5.5 2.75 3.85 3.85 VIL Maximum LOW Level 3.0 1.5 0.9 0.9 VOUT = 0.1V Input Voltage 4.5 2.25 1.35 1.35 V or VCC − 0.1V 5.5 2.75 1.65 1.65 VOH Minimum HIGH Level 3.0 2.99 2.9 2.9 Output Voltage 4.5 4.49 4.4 4.4 V IOUT = −50 µA 5.5 5.49 5.4 5.4 VIN = VIL or VIH 3.0 2.56 2.46 IOH = −12 mA 4.5 3.86 3.76 V IOH = −24 mA 5.5 4.86 4.76 IOH = −24 mA (Note 2) VOL Maximum LOW Level 3.0 0.002 0.1 0.1 Output Voltage 4.5 0.001 0.1 0.1 V IOUT = 50 µA 5.5 0.001 0.1 0.1 VIN = VIL or VIH 3.0 0.36 0.44 IOL = 12 mA 4.5 0.36 0.44 V IOL = 24 mA 0 5.5 0.36 0.44 IOL = 24 mA (Note 2) I(INNo te 4) LMeaaxkimaguem C Iunrpruetnt 5.5 ±0.1 ±1.0 µA VI = VCC, GND IOLD Minimum Dynamic 5.5 75 mA VOLD = 1.65V Max IOHD Output Current (Note 3) 5.5 −75 mA VOHD = 3.85V Min I(CNCote 4) MSuapxpimlyu Cmu rQreunietscent 5.5 4.0 40.0 µA VIN = VCC or GND Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. 3 www.fairchildsemi.com

8 3 DC Electrical Characteristics for ACT 1 T C VCC TA = +25°C TA = −40°C to +85°C A Symbol Parameter Units Conditions (V) Typ Guaranteed Limits 4 (cid:127) 7 VIH MInipnuimt Vuomlt aHgIeGH Level 45..55 11..55 22..00 22..00 V VorO VUCT C= −0 .01.V1V 38 VIL Maximum LOW Level 4.5 1.5 0.8 0.8 V VOUT = 0.1V C1 Input Voltage 5.5 1.5 0.8 0.8 or VCC − 0.1V 4A VOH MOuintipmuut mVo HltaIGgeH Level 45..55 45..4499 45..44 45..44 V IOUT = −50 µA 7 VIN = VIL or VIH 4.5 3.86 3.76 V IOH = −24 mA 5.5 4.86 4.76 IOH = −24 mA (Note 5) VOL MOuatxpimutu Vmo lLtaOgWe Level 45..55 00..000011 00..11 00..11 V IOUT = 50 µA VIN = VIL or VIH 4.5 0.36 0.44 V IOL 24 mA 5.5 0.36 0.44 IOL.= 24 mA (Note 5) IIN MLeaaxkimaguem C Iunrpruetnt 5.5 ±0.1 ±1.0 µA VI = VCC, GND ICCT MICaCx/Iinmpuumt 5.5 0.6 1.5 mA VI = VCC − 2.1V IOLD Minimum Dynamic 5.5 75 mA VOLD = 1.65V Max IOHD Output Current (Note 6) 5.5 −75 mA VOHD = 3.85V Min ICC MSuapxpimlyu Cmu rQreunietscent 5.5 4.0 40.0 µA VIN = VCC or GND Note 5: All outputs loaded; thresholds on input associated with output under test. Note 6: Maximum test duration 2.0 ms, one output loaded at a time. AC Electrical Characteristics for AC VCC TA = +25°C TA = −40°C to +85°C Symbol Parameter (V) CL = 50 pF CL = 50 pF Units (Note 7) Min Typ Max Min Max tPLH Propagation Delay 3.3 1.5 8.5 13.0 1.5 15.0 ns An to On 5.0 1.5 6.5 9.5 1.5 10.5 tPHL Propagation Delay 3.3 1.5 8.0 12.5 1.5 14.0 ns An to On 5.0 1.5 6.0 9.0 1.5 10.5 tPLH Propagation Delay 3.3 1.5 11.0 15.0 1.5 16.0 ns E1 or E2 to On 5.0 1.5 8.0 11.0 1.5 12.0 tPHL Propagation Delay 3.3 1.5 9.5 13.5 1.5 15.0 ns E1 or E2 to On 5.0 1.5 7.0 9.5 1.5 10.5 tPLH Propagation Delay 3.3 1.5 11.0 15.5 1.5 16.5 ns E3 to On 5.0 1.5 8.0 11.0 1.5 12.5 tPHL Propagation Delay 3.3 1.5 8.5 13.0 1.5 14.0 ns E3 to On 5.0 1.5 6.0 8.0 1.0 9.5 Note 7: Voltage Range 3.3 is 3.3V ± 0.3V Voltage Range 5.0 is 5.0V ± 0.5V www.fairchildsemi.com 4

7 AC Electrical Characteristics for ACT 4 A C VCC TA = +25°C TA = −40°C to +85°C 1 Symbol Parameter (V) CL = 50 pF CL = 50 pF Units 38 (Note 8) Min Typ Max Min Max (cid:127) tPLH Propagation Delay 5.0 1.5 7.0 10.5 1.5 11.5 ns 74 An to On A tPHL Propagation Delay 5.0 1.5 6.5 10.5 1.5 11.5 ns CT An to On 1 tPLH Propagation Delay 5.0 2.5 8.0 11.5 2.0 12.5 ns 38 E1 or E2 to On tPHL Propagation Delay 5.0 2.0 7.5 11.5 2.0 12.5 ns E1 or E2 to On tPLH Propagation Delay 5.0 2.5 8.0 12.0 2.0 13.0 ns E3 to On tPHL Propagation Delay 5.0 2.0 6.5 10.5 1.5 11.5 ns E3 to On Note 8: Voltage Range 5.0 is 5.0V ± 0.5V Capacitance Symbol Parameter Typ Units Conditions CIN Input Capacitance 4.5 pF VCC = OPEN CPD Power Dissipation Capacitance 60.0 pF VCC = 5.0V 5 www.fairchildsemi.com

8 3 Physical Dimensions 1 inches (millimeters) unless otherwise noted T C A 4 7 (cid:127) 8 3 1 C A 4 7 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow Package Number M16A www.fairchildsemi.com 6

7 Physical Dimensions 4 inches (millimeters) unless otherwise noted (Continued) A C 1 3 8 (cid:127) 7 4 A C T 1 3 8 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M16D 7 www.fairchildsemi.com

8 3 Physical Dimensions 1 inches (millimeters) unless otherwise noted (Continued) T C A 4 7 (cid:127) 8 3 1 C A 4 7 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC16 www.fairchildsemi.com 8

7 Physical Dimensions 4 inches (millimeters) unless otherwise noted (Continued) A C 1 3 8 (cid:127) 7 4 A C T 1 3 8 1 - o f - 8 D e c o d e r / D e m 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide u Package Number N16E lt i p l e x e r Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. 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 THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems 2. A critical component in any component of a life support which, (a) are intended for surgical implant into the device or system whose failure to perform can be rea- body, or (b) support or sustain life, and (c) whose failure sonably expected to cause the failure of the life support to perform when properly used in accordance with device or system, or to affect its safety or effectiveness. instructions for use provided in the labeling, can be rea- sonably expected to result in a significant injury to the www.fairchildsemi.com user. 9 www.fairchildsemi.com

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

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: O N Semiconductor: 74ACT138SCX 74ACT138SJX 74ACT138SJ 74ACT138SC