Fairchild Semiconductor 74ACT139SJX, 74ACT139SJ, 74ACT139SCX, 74ACT139SC, 74ACT139PC Datasheet
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November 1988
Revised November 1999
74AC139 • 74ACT139
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 mutuallyexclusive 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.
Features
■ICC reduced by 50%
■Multifunction capability
■Two completely independent 1-of-4 decoders
■Active LOW mutually exclusive outputs
■Outputs source/sink 24 mA
■ACT139 has TTL-compatible inputs
Ordering Code:
Order Number |
Package Number |
Package Description |
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74AC139SC |
M16A |
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body |
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74AC139SJ |
M16D |
16-Lead Small Outline Package (SOIC), EIAJ Type II, 5.3mm Wide |
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74AC139MTC |
MTC16 |
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide |
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74AC139PC |
N16E |
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide |
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74ACT139SC |
M16A |
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body |
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74ACT139SJ |
M16D |
16-Lead Small Outline Package (SOIC), EIAJ Type II, 5.3mm Wide |
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74ACT139MTC |
MTC16 |
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide |
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74ACT139PC |
N16E |
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide |
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Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram |
Pin Descriptions |
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Pin Names |
Description |
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A0, A1 |
Address Inputs |
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Enable Inputs |
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E |
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O |
0–O |
3 |
Outputs |
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FACT is a trademark of Fairchild Semiconductor Corporation.
Decoder/Demultiplexer 4-of-1 Dual 74ACT139 • 74AC139
© 1999 Fairchild Semiconductor Corporation |
DS009926 |
www.fairchildsemi.com |
74AC139 • 74ACT139
Logic Symbols |
Functional Description |
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The AC/ACT139 is a high-speed dual 1-of-4 decoder/ |
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demultiplexer. The device has two independent decoders, |
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each of which accepts two binary weighted inputs (A0–A1) |
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and provides four mutually exclusive active-LOW outputs |
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(O0–O3). Each decoder has an active-LOW enable (E). |
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When |
E |
is HIGH all outputs are forced HIGH. The enable |
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can be used as the data input for a 4-output demultiplexer |
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application. Each half of the AC/ACT139 generates all four |
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minterms of two variables. These four minterms are useful |
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in some applications, replacing multiple gate functions as |
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shown in Figure 1, and thereby reducing the number of |
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packages required in a logic network. |
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IEEE/IEC
FIGURE 1. Gate Functions (Each Half)
Truth Table
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Inputs |
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Outputs |
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E |
A0 |
A1 |
O0 |
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O1 |
O2 |
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O3 |
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H |
X |
X |
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H |
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H |
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H |
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H |
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L |
L |
L |
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L |
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H |
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H |
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H |
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L |
H |
L |
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H |
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L |
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H |
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H |
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L |
L |
H |
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H |
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H |
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L |
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H |
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L |
H |
H |
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H |
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H |
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H |
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L |
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H = |
HIGH Voltage Level |
L = |
LOW Voltage Level |
X = |
Immaterial |
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
www.fairchildsemi.com |
2 |
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC) |
− 0.5V to + 7.0V |
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DC Input Diode Current (IIK) |
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VI = |
− 0.5V |
− 20 mA |
VI = |
VCC + 0.5V |
+ 20 mA |
DC Input Voltage (VI) |
− 0.5V to VCC + 0.5V |
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DC Output Diode Current (IOK) |
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VO = |
− 0.5V |
− 20 mA |
VO = |
VCC + 0.5V |
+ 20 mA |
DC Output Voltage (VO) |
− 0.5V to VCC + 0.5V |
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DC Output Source |
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or Sink Current (IO) |
± 50 mA |
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DC VCC or Ground Current |
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per Output Pin (ICC or IGND) |
± 50 mA |
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Storage Temperature (TSTG) |
− 65° C to + 150° C |
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Junction Temperature (TJ) |
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PDIP |
140° C |
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Recommended Operating
Conditions
Supply Voltage (VCC) |
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AC |
2.0V to 6.0V |
ACT |
4.5V to 5.5V |
Input Voltage (VI) |
0V to VCC |
Output Voltage (VO) |
0V to VCC |
Operating Temperature (TA) |
− 40° C to + 85° C |
Minimum Input Edge Rate (∆ V/∆ t) |
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AC Devices |
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VIN from 30% to 70% of VCC |
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VCC @ 3.3V, 4.5V, 5.5V |
125 mV/ns |
Minimum Input Edge Rate (∆ V/∆ t) |
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ACT Devices |
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VIN from 0.8V to 2.0V |
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VCC @ 4.5V, 5.5V |
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. Fairchild does not recommend operation of FACT circuits outside databook specifications.
DC Electrical Characteristics for AC
Symbol |
Parameter |
VCC |
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TA = + 25° C |
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TA = − 40° C to + 85° C |
Units |
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Conditions |
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(V) |
Typ |
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Guaranteed Limits |
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VIH |
Minimum HIGH Level |
3.0 |
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1.5 |
2.1 |
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2.1 |
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VOUT = |
0.1V |
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Input Voltage |
4.5 |
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2.25 |
3.15 |
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3.15 |
V |
or VCC − |
0.1V |
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5.5 |
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2.75 |
3.85 |
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3.85 |
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VIL |
Maximum LOW Level |
3.0 |
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1.5 |
0.9 |
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0.9 |
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VOUT = |
0.1V |
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Input Voltage |
4.5 |
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2.25 |
1.35 |
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1.35 |
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or VCC − |
0.1V |
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5.5 |
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2.75 |
1.65 |
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1.65 |
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VOH |
Minimum HIGH Level |
3.0 |
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2.99 |
2.9 |
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2.9 |
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Output Voltage |
4.5 |
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4.49 |
4.4 |
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4.4 |
V |
IOUT = |
− |
50 µ A |
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5.5 |
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5.49 |
5.4 |
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5.4 |
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VIN = |
VIL or VIH |
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3.0 |
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2.56 |
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2.46 |
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IOH = |
− |
12 mA |
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4.5 |
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3.86 |
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3.76 |
V |
IOH = |
− |
24 mA |
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5.5 |
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4.86 |
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4.76 |
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IOH = |
− 24 mA (Note 2) |
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VOL |
Maximum LOW Level |
3.0 |
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0.002 |
0.1 |
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0.1 |
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Output Voltage |
4.5 |
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0.001 |
0.1 |
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0.1 |
V |
IOUT = |
50 µ A |
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5.5 |
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0.001 |
0.1 |
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0.1 |
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VIN = |
VIL or VIH |
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3.0 |
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0.36 |
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0.44 |
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IOL = |
12 mA |
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4.5 |
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0.36 |
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0.44 |
V |
IOL = |
24 mA |
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5.5 |
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0.36 |
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0.44 |
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IOL = |
24 mA (Note 2) |
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IIN |
Maximum Input |
5.5 |
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± 0.1 |
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± 1.0 |
µ A |
VI = |
VCC, GND |
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(Note 4) |
Leakage Current |
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IOLD |
Minimum Dynamic |
5.5 |
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75 |
mA |
VOLD = |
1.65V Max |
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IOHD |
Output Current (Note 3) |
5.5 |
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− 75 |
mA |
VOHD = |
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3.85V Min |
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ICC |
Maximum Quiescent |
5.5 |
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4.0 |
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40.0 |
µ A |
VIN = |
VCC or GND |
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(Note 4) |
Supply Current |
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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.
74ACT139 • 74AC139
3 |
www.fairchildsemi.com |
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