54AC139 * 54ACT139 Dual 1-of-4 Decoder/Demultiplexer General Description The 'AC/'ACT139 is a high-speed, dual 1-of-4 decoder/ demultiplexer. The device has two independent decoders, each accepting two inputs and providing four mutually-exclusive active-LOW outputs. Each decoder has an active-LOW Enable input which can be used as a data input for a 4-output demultiplexer. Each half of the 'AC/ 'ACT139 can be used as a function generator providing all four minterms of two variables. n n n n n n Multifunction capability Two completely independent 1-of-4 decoders Active LOW mutually exclusive outputs Outputs source/sink 24 mA 'ACT139 has TTL-compatible inputs Standard Military Drawing (SMD) -- 'AC139: 5962-87623 -- 'ACT139: 5962-87553 Features n ICC reduced by 50% Logic Symbols IEEE/IEC DS100269-8 DS100269-2 Pin Names Description A0, A1 Address Inputs E Enable Inputs O0-O3 Outputs DS100269-1 FACT (R) is a registered trademark of Fairchild Semiconductor Corporation. (c) 1998 National Semiconductor Corporation DS100269 www.national.com 54AC139 * 54ACT139 Dual 1-of-4 Decoder/Demultiplexer August 1998 Connection Diagrams can be used as the data input for a 4-output demultiplexer application. Each half of the 'AC/'ACT139 generates all four minterms of two variables. These four minterms are useful in some applications, replacing multiple gate functions as shown in , and thereby reducing the number of packages required in a logic network. Pin Assignment for DIP and Flatpak DS100269-3 Pin Assignment for LCC DS100269-6 FIGURE 1. Gate Functions (Each Half) Truth Table Inputs DS100269-4 Functional Description The 'AC/'ACT139 is a high-speed dual 1-of-4 decoder/ demultiplexer. The device has two independent decoders, each of which accepts two binary weighted inputs (A0-A1) and provides four mutually exclusive active-LOW outputs (O0-O3). Each decoder has an active-LOW enable (E). When E is HIGH all outputs are forced HIGH. The enable www.national.com Outputs E A0 A1 O0 O1 O2 O3 H X X H H H H L L L L H H H L H L H L H H L L H H H L H L H H H H H L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial 2 Logic Diagram DS100269-5 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 3 www.national.com Absolute Maximum Ratings (Note 1) Recommended Operating Conditions If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Diode Current (IIK) VI = -0.5V VI = VCC + 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = -0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) Storage Temperature (TSTG) Junction Temperature (TJ) CDIP Supply Voltage (VCC) 'AC 'ACT Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54AC/ACT Minimum Input Edge Rate (V/t) 'AC Devices VIN from 30% to 70% of VCC VCC @ 3.3V, 4.5V, 5.5V Minimum Input Edge Rate (V/t) 'ACT Devices VIN from 0.8V to 2.0V VCC @ 4.5V, 5.5V -0.5V to +7.0V -20 mA +20 mA -0.5V to VCC + 0.5V -20 mA +20 mA -0.5V to VCC + 0.5V 50 mA 50 mA -65C to +150C 2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC -55C to +125C 125 mV/ns 125 mV/ns Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. National does not recommend operation of FACT (R) circuits outside databook specifications. 175C DC Characteristics for 'AC Family Devices Symbol Parameter 54AC TA = VCC (V) Units Conditions -55C to +125C Guaranteed Limits VIH VIL VOH VOL IIN Minimum High Level 3.0 2.1 Input Voltage 4.5 3.15 5.5 3.85 Maximum Low Level 3.0 0.9 Input Voltage 4.5 1.35 5.5 1.65 Minimum High Level 3.0 2.9 Output Voltage 4.5 4.4 5.5 5.4 3.0 2.4 4.5 3.7 5.5 4.7 Maximum Low Level 3.0 0.1 Output Voltage 4.5 0.1 5.5 0.1 Maximum Input 3.0 0.50 4.5 0.50 5.5 0.50 5.5 1.0 Leakage Current www.national.com 4 VOUT = 0.1V V or VCC - 0.1V V or VCC - 0.1V VOUT = 0.1V IOUT = -50 A V V (Note 2) VIN = VIL or VIH IOH = -12 mA IOH = -24 mA IOH = -24 mA IOUT = 50 A V (Note 2) VIN = VIL or VIH IOL = 12 mA V A IOL = 24 mA IOL = 24 mA VI = VCC, GND DC Characteristics for 'AC Family Devices Symbol Parameter (Continued) 54AC TA = VCC (V) Units Conditions -55C to +125C Guaranteed Limits IOLD IOHD ICC (Note 3) Minimum Dynamic Output Current 5.5 50 mA 5.5 -50 mA Maximum Quiescent 5.5 80.0 A Supply Current VOLD = 1.65V Max VOHD = 3.85V Min 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. ICC for 54AC @ 25C is identical to 74AC @ 25C. DC Characteristics for 'ACT Family Devices Symbol Parameter 54ACT TA = VCC (V) Units Conditions -55C to +125C Guaranteed Limits VIH VIL VOH VOL IIN Minimum High Level 4.5 2.0 Input Voltage 5.5 2.0 Maximum Low Level 4.5 0.8 Input Voltage 5.5 0.8 Minimum High Level 4.5 4.4 Output Voltage 5.5 5.4 4.5 3.70 5.5 4.70 Maximum Low Level 4.5 0.1 Output Voltage 5.5 0.1 Maximum Input V VOUT = 0.1V V or VCC - 0.1V VOUT = 0.1V V or VCC - 0.1V IOUT = -50 A V (Note 5) VIN = VIL or VIH IOH = -24 mA V IOH = -24 mA IOUT = 50 A V (Note 5) VIN = VIL or VIH IOL = 24 mA 4.5 0.50 5.5 0.50 5.5 1.0 A IOL = 24 mA VI = VCC, GND 5.5 1.6 mA VI = VCC - 2.1V VOLD = 1.65V Max VOHD = 3.85V Min Leakage Current ICCT Maximum ICC/Input (Note 6) IOLD Minimum Dynamic 5.5 50 mA IOHD Output Current 5.5 -50 mA ICC Maximum Quiescent 5.5 80.0 A Supply Current 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. Note 7: ICC for 54ACT @ 25C is identical to 74ACT @ 25C. 5 www.national.com AC Electrical Characteristics 54AC TA = -55C VCC Symbol Parameter (V) to +125C CL = 50 pF (Note 8) tPLH tPHL tPLH tPHL Min Max Propagation Delay 3.3 1.0 14.5 An to On 5.0 1.0 11.0 Propagation Delay 3.3 1.0 12.5 An to On 5.0 1.0 10.0 Propagation Delay 3.3 1.0 14.5 En to On 5.0 1.0 11.0 Propagation Delay 3.3 1.0 12.5 En to On 5.0 1.0 10.0 Fig. Units No. ns ns ns ns Note 8: Voltage Range 3.3 is 3.3V 0.3V Voltage Range 5.0 is 5.0V 0.5V AC Electrical Characteristics 54ACT TA = -55C VCC Symbol Parameter (V) to +125C CL = 50 pF (Note 9) tPLH Propagation Delay Fig. Units Min Max 5.0 1.0 12.0 ns 5.0 1.0 11.0 ns 5.0 1.0 12.5 ns 5.0 1.0 12.0 ns An to On tPHL Propagation Delay An to On tPLH Propagation Delay En to On tPHL Propagation Delay En to On Note 9: Voltage Range 5.0 is 5.0V 0.5V Capacitance Symbol CIN CPD Typ Units Input Capacitance Parameter 4.5 pF Power Dissipation 40.0 pF Capacitance www.national.com 6 Conditions VCC = OPEN VCC = 5.0V No. Physical Dimensions inches (millimeters) unless otherwise noted 20 Terminal Ceramic Leadless Chip Carrier (L) NS Package Number E20A 16 Lead Ceramic Dual In-Line Package (D) NS Package Number J16A 7 www.national.com 54AC139 * 54ACT139 Dual 1-of-4 Decoder/Demultiplexer Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16 Lead Ceramic Flatpak (F) NS Package Number W16A LIFE SUPPORT POLICY NATIONAL'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 NATIONAL SEMICONDUCTOR CORPORATION. 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