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Part: 54ACT139L
Category:
Description: Dual 1-of-4 Decoder/demultiplexer
Company: National Semiconductor Corporation
Datasheet: Download 54ACT139L datasheet File size : 275 kB
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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
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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
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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
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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
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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
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