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PDF MC74AC251 Data sheet ( Hoja de datos )
| Número de pieza | MC74AC251 | |
| Descripción | 8-Input Multiplexer | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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( DataSheet : www.DataSheet4U.com )
MC74AC251
MC74ACT251
8ĆInput Multiplexer
with 3ĆState Outputs
The MC74AC251/74ACT251 is a high-speed 8-input digital multiplexer. It
provides, in one package, the ability to select one bit of data from up to eight
sources. It can be used as a universal function generator to generate any logic
function of four variables. Both true and complementary outputs are provided.
• Multifunctional Capability
• On-Chip Select Logic Decoding
• Inverting and Noninverting 3-State Outputs
• Outputs Source/Sink 24 mA
• ′ACT251 Has TTL Compatible Inputs
VCC I4 I5 I6 I7 S0 S1 S2
16 15 14 13 12 11 10 9
8-INPUT
MULTIPLEXER WITH
3-STATE OUTPUTS
N SUFFIX
CASE 648-08
PLASTIC
12345678
I3 I2 I1 I0 Z Z OE GND
PIN NAMES
S0–S2
OE
I0–I7
Z
Z
Select Inputs
3-State Output Enable Input
Multiplexer Inputs
3-State Multiplexer Output
Complementary 3-State Multiplexer Output
TRUTH TABLE
Inputs
Outputs
OE S2 S1 S0
Z
HXXXZ
L L L L I0
L L L H I1
L L H L I2
L L H H I3
L H L L I4
L H L H I5
L H H L I6
L H H H I7
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Z
Z
I0
I1
I2
I3
I4
I5
I6
I7
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FACT DATA
5-1
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
S0 OE I0 I1 I2 I3 I4 I5 I6 I7
S1
S2 Z
Z
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1 page  
MC74AC251 MC74ACT251
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
tPLH
tPHL
tPLH
tPHL
tPZH
Propagation Delay
Sn to Z or Z
Propagation Delay
Sn to Z or Z
Propagation Delay
In to Z or Z
Propagation Delay
In to Z or Z
Output Enable Time
OE to Z or Z
tPZL
Output Enable Time
OE to Z or Z
tPHZ
Output Disable Time
OE to Z or Z
tPLZ
Output Disable Time
OE to Z or Z
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
Min Typ Max
3.3 1.5 11.5 17.5
5.0 1.5 8.5 12.5
3.3 1.5 11.0 17.5
5.0 1.5 8.0 12.5
3.3 1.5 10.0 14.0
5.0 1.5 7.0 10.0
3.3 1.5 9.0 14.0
5.0 1.5 6.5 10.0
3.3 1.5 7.5 11.0
5.0 1.5 5.5 8.0
3.3 1.5 7.5 11.0
5.0 1.5 5.5 8.0
3.3 1.5 8.5 11.5
5.0 1.5 7.0 9.5
3.3 1.5 7.0 11.0
5.0 1.5 5.5 8.0
74AC
TA = –40°C
to +85°C
CL = 50 pF
Min Max
1.5 19.0
1.5 13.5
1.5 19.0
1.5 13.5
1.5 15.5
1.5 11.0
1.5 15.5
1.5 11.0
1.5 12.0
1.5 9.0
1.5 12.0
1.5 9.0
1.5 13.0
1.5 10.0
1.5 12.0
1.5 8.5
Unit
ns
ns
ns
ns
ns
ns
ns
ns
Fig.
No.
3-6
3-6
3-5
3-5
3-7
3-8
3-7
3-8
FACT DATA
5-5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC74AC251.PDF ] | |
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