Dual 1-of-4 Decoder/Demultiplexer

www.DataSheet4U.com 54AC139 • 54ACT139 Dual 1-of-4 Decoder/Demultiplexer August 1998 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 A0, A1 E O0–O3 Description Address Inputs Enable Inputs Outputs DS100269-1 FACT ® is a registered trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100269 www.national.com Connection Diagrams Pin Assignment for DIP and Flatpak 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. DS100269-3 Pin Assignment for LCC DS100269-6 FIGURE 1. Gate Functions (Each Half) Truth Table Inputs DS100269-4 Outputs A1 X L L H H O0 H L H H H O1 H H L H H O2 H H H L H O3 H H H H L E H L L L L A0 X L H L H 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 H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial www.national.com 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) 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 −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 Recommended Operating Conditions 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 2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC −55˚C to +125˚C 125 mV/ns ±50 mA ±50 mA −65˚C to +150˚C 175˚C 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 ® circuits outside databook specifications. DC Characteristics for ’AC Family Devices Symbol Parameter VCC (V) 54AC TA = −55˚C to +125˚C Guaranteed Limits VIH Minimum High Level Input Voltage VIL Maximum Low Level Input Voltage VOH Minimum High Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 3.0 4.5 5.5 2.1 3.15 3.85 0.9 1.35 1.65 2.9 4.4 5.4 (Note 2) VIN = VIL or VIH IOH = −12 mA IOH = −24 mA IOH = −24 mA IOUT = 50 µA V (Note 2) VIN = VIL or VIH IOL = 12 mA V µA IOL = 24 mA IOL = 24 mA VI = VCC, GND V IOUT = −50 µA V VOUT = 0.1V or VCC − 0.1V V VOUT = 0.1V or VCC − 0.1V Units Conditions 3.0 4.5 5.5 VOL Maximum Low Level Output Voltage 3.0 4.5 5.5 2.4 3.7 4.7 0.1 0.1 0.1 V 3.0 4.5 5.5 IIN Maximum Input Leakage Current 5.5 0.50 0.50 0.50 ±1.0 www.national.com 4 DC Characteristics for ’AC Family Devices Symbol Parameter VCC (V) (Continued) 54AC TA = −55˚C to +125˚C Guaranteed Limits Units Conditions IOLD IOHD ICC (Note 3) Minimum Dynamic Output Current Maximum Quiescent Supply Current 5.5 5.5 5.5 50 −50 80.0 mA mA µA 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 @ 25˚C is identical to 74AC @ 25˚C. DC Characteristics for ’ACT Family Devices Symbol Parameter VCC (V) 54ACT TA = −55˚C to +125˚C Guaranteed Limits VIH VIL VOH Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 2.0 2.0 0.8 0.8 4.4 5.4 (Note 5) VIN = VIL or VIH IOH = −24 mA IOH = −24 mA IOUT = 50 µA (Note 5) VIN = VIL or VIH IOL = 24 mA IOL = 24 mA VI = VCC, GND VI = VCC − 2.1V VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC or GND V V V VOUT = 0.1V or VCC − 0.1V VOUT = 0.1V or VCC − 0.1V IOUT = −50 µA Units Conditions 4.5 5.5 VOL Maximum Low Level Output Voltage 4.5 5.5 3.70 4.70 0.1 0.1 V V 4.5 5.5 IIN ICCT IOLD IOHD ICC Maximum Input Leakage Current Maximum ICC/Input (Note 6) Minimum Dynamic Output Current Maximum Quiescent Supply Current 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 @ 25˚C is identical to 74ACT @ 25˚C. 0.50 0.50 V µA mA mA mA µA 5.5 5.5 5.5 5.5 5.5 ±1.0 1.6 50 −50 80.0 5 www.national.com AC Electrical Characteristics VCC Symbol Parameter (V) (Note 8) tPLH tPHL tPLH tPHL Propagation Delay An to On Propagation Delay An to On Propagation Delay En to On Propagation Delay En to On Note 8: Voltage Range 3.3 is 3.3V ±0.3V Voltage Range 5.0 is 5.0V ±0.5V 54AC TA = −55˚C to +125˚C CL = 50 pF Min Max 14.5 11.0 12.5 10.0 14.5 11.0 12.5 10.0 ns ns ns ns 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Units Fig. No. 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 AC Electrical Characteristics VCC Symbol Parameter (V) (Note 9) tPLH tPHL tPLH tPHL Propagation Delay An to On Propagation Delay An to On Propagation Delay En to On Propagation Delay En to On Note 9: Voltage Range 5.0 is 5.0V ±0.5V 54ACT TA = −55˚C to +125˚C CL = 50 pF Min Max 12.0 11.0 12.5 12.0 ns ns ns ns 1.0 1.0 1.0 1.0 Units Fig. No. 5.0 5.0 5.0 5.0 Capacitance Symbol CIN CPD Parameter Input Capacitance Power Dissipation Capacitance Typ 4.5 40.0 Units pF pF Conditions VCC = OPEN VCC = 5.0V www.national.com 6 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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