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PDF 74ACT139 Data sheet ( Hoja de datos )
| Número de pieza | 74ACT139 | |
| Descripción | DUAL 1-OF-4 DECODER/DEMULTIPLEXER | |
| Fabricantes | Motorola Inc | |
| Logotipo |  |
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MC74AC139
MC74ACT139
Dual 1ĆofĆ4 Decoder/Demultiplexer
The MC74AC139/74ACT139 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 MC74AC139/74ACT139 can be used as a function generator providing
four minterms of two variables.
• Multifunction Capability
• Two Completely Independent 1-of-4 Decoders
• Active LOW Mutually Exclusive Outputs
• Outputs Source/Sink 24 mA
• ′ACT139 Has TTL Compatible Inputs
VCC Eb A0b A1b O0b O1b O2b O3b
16 15 14 13 12 11 10 9
DUAL 1-OF-4
DECODER/DEMULTIPLEXER
N SUFFIX
CASE 648-08
PLASTIC
12345678
Ea A0a A1a O0a O1a O2a O3a GND
TRUTH TABLE
Inputs
E A0 A1 O0
HXX
LLL
LHL
LLH
LHH
H
L
H
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Outputs
O1 O2
HH
HH
LH
HL
HH
O3
H
H
H
H
L
PIN NAMES
A0, A1
E
O0–O3
Address Inputs
Enable Inputs
Outputs
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
E A0 A1
DECODER a
O0 O1 O2 O3
E A0 A1
DECODER b
O0 O1 O2 O3
FACT DATA
5-1
1 page  
MC74AC139 MC74ACT139
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74ACT
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
tPLH
Propagation Delay
An to On
tPHL
Propagation Delay
An to On
tPLH
Propagation Delay
En to On
tPHL
Propagation Delay
En to On
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
Min Typ Max
5.0 1.5 6.0 8.5
5.0 1.5 6.0 9.5
5.0 2.5 7.0 10.0
5.0 2.0 7.0 9.5
74ACT
TA = –40°C
to +85°C
CL = 50 pF
Min Max
1.5 9.5
1.5 10.5
2.0 11.0
1.5 10.5
Unit
ns
ns
ns
ns
Fig.
No.
3-6
3-6
3-6
3-6
CAPACITANCE
Symbol
Parameter
CIN
CPD
Input Capacitance
Power Dissipation Capacitance
Value
Typ
4.5
40
Unit
pF
pF
Test Conditions
VCC = 5.0 V
VCC = 5.0 V
FACT DATA
5-5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet 74ACT139.PDF ] | |
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