74LVX138MTC [FAIRCHILD]
Low Voltage 1-of-8 Decoder/Demultiplexer; 低压1 - 8解码器/多路解复用器
| 型号： | 74LVX138MTC |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Low Voltage 1-of-8 Decoder/Demultiplexer |
| 文件： | 总7页 (文件大小：82K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
June 1993
Revised October 2003
74LVX138
Low Voltage 1-of-8 Decoder/Demultiplexer
General Description
Features
The LVX138 is a high-speed 1-of-8 decoder/demultiplexer.
This device is ideally suited for high-speed bipolar memory
chip select address decoding. The multiple input enables
allow parallel expansion to a 1-of-24 decoder using just
three LVX138 devices or a 1-of-32 decoder using four
LVX138 devices and one inverter.
■ Input voltage level translation from 5V to 3V
■ Ideal for low power/low noise 3.3V applications
■ Guaranteed simultaneous switching noise level and
dynamic threshold performance
Ordering Code:
Order Number Package Number
Package Description
74LVX138M
M16A
M16D
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LVX138SJ
74LVX138MTC
MTC16
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
Pin Descriptions
Pin Names
A0–A2
Description
Address Inputs
Enable Inputs
Enable Input
Outputs
IEEE/IEC
E1– E2
E3
O0–O7
© 2003 Fairchild Semiconductor Corporation
DS011615
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Functional Description
The LVX138 high-speed 1-of-8 decoder/demultiplexer
All outputs will be HIGH unless E1 and E2 are LOW and E3
is HIGH.
accepts three binary weighted inputs (A0, A1, A2) and,
when enabled, provides eight mutually exclusive active-
LOW outputs (O0–O7). The LVX138 features three Enable
The LVX138 can be used as an 8-output demultiplexer by
using one of the active LOW Enable inputs as the data
input and the other Enable inputs as strobes. The Enable
inputs which are not used must be permanently tied to their
appropriate active-HIGH or active-LOW state.
inputs, two active-LOW (E1, E2) and one active-HIGH (E3).
Truth Table
Inputs
Outputs
E1
E2
E3
A0
A1
A2
O0
O1
O2
O3
O4
O5
O6
O7
H
X
X
X
H
X
X
X
L
X
X
X
X
X
X
X
X
X
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
H
H
H
H
L
H
L
L
L
L
L
L
L
L
H
H
H
H
L
H
H
L
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
H
H
H
H
L
H
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
L
H
H
L
H
H
H
L
H
H
H
H
H
H
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.
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2
Absolute Maximum Ratings(Note 1)
Recommended Operating
Conditions (Note 2)
−0.5V to +7.0V
Supply Voltage (VCC
)
DC Input Diode Current (IIK
VI = −0.5V
)
Supply Voltage (VCC
−20 mA Input Voltage (VI)
−0.5V to 7V
)
2.0V to 3.6V
0V to 5.5V
DC Input Voltage (VI)
Output Voltage (VO)
0V to VCC
DC Output Diode Current (IOK
)
Operating Temperature (TA)
−20 mA Input Rise and Fall Time (∆t/∆V)
+20 mA
−40°C to +85°C
0 ns/V to 100 ns/V
V
V
O = −0.5V
O = VCC + 0.5V
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
DC Output Voltage (VO)
DC Output Source
−0.5V to VCC + 0.5V
or Sink Current (IO)
±25 mA
±75 mA
DC VCC or Ground Current (ICC or IGND
)
Note 2: Unused inputs must be held HIGH or LOW. They may not float.
Storage Temperature (TSTG
Power Dissipation
)
−65°C to +150°C
180 mW
DC Electrical Characteristics
T
A = +25°C
TA = −40°C to +85°C
VCC
Symbol
Parameter
Units
Conditions
Min
1.5
2.0
2.4
Typ
Max
Min
1.5
2.0
2.4
Max
VIH
HIGH Level
2.0
3.0
3.6
2.0
3.0
3.6
2.0
3.0
3.0
2.0
3.0
3.0
3.6
3.6
Input Voltage
V
VIL
LOW Level
0.5
0.8
0.8
0.5
0.8
0.8
Input Voltage
V
V
V
VOH
HIGH Level
1.9
2.9
2.0
3.0
1.9
2.9
V
IN = VIL or VIH
I
I
I
I
I
I
OH = −50 µA
Output Voltage
OH = −50 µA
OH = −4 mA
OL = 50 µA
OL = 50 µA
OL = 4 mA
2.58
2.48
VOL
LOW Level
0.0
0.0
0.1
0.1
0.1
0.1
V
IN = VIL or VIH
Output Voltage
0.36
±0.1
4.0
0.44
±1.0
40.0
IIN
Input Leakage Current
µA
µA
V
IN = 5.5V or GND
IN = VCC or GND
ICC
Quiescent Supply Current
V
Noise Characteristics (Note 3)
VCC
T
A = 25°C
CL (pF)
Symbol
Parameter
Units
(V)
3.3
3.3
3.3
3.3
Typ
0.3
Limit
VOLP
VOLV
VIHD
VILD
Quiet Output Maximum Dynamic VOL
Quiet Output Minimum Dynamic VOL
0.5
−0.5
2.0
V
V
V
V
50
50
50
50
−0.3
Minimum HIGH Level Dynamic Input Voltage
Maximum LOW Level Dynamic Input Voltage
0.8
Note 3: Input tr = tf = 3 ns
3
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AC Electrical Characteristics
VCC
T
A = +25°C
TA = −40°C to +85°C
Symbol
Parameter
Units
CL (pF)
(V)
Min
Typ
7.1
9.6
5.5
8.0
8.8
11.3
6.9
9.4
8.7
11.2
6.8
9.3
Max
13.8
17.3
8.8
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Max
16.5
20.0
10.5
14.0
18.5
22.0
11.5
15.0
19.5
23.0
12.5
16.0
1.5
tPLH
tPHL
Propagation
Delay Time
n to On
2.7
15
50
15
50
15
50
15
50
15
50
15
50
50
ns
A
3.3 ± 0.3
2.7
12.3
16.0
19.5
10.4
13.9
16.3
19.8
10.6
14.1
1.5
tPLH
tPHL
Propagation
Delay Time
ns
E1 or E2 to On
3.3 ± 0.3
2.7
tPLH
tPHL
Propagation
Delay Time
E3 to On
ns
ns
3.3 ± 0.3
tOSHL
tOSLH
Output to Output
Skew (Note 4)
2.7
3.3
1.5
1.5
Note 4: Parameter guaranteed by design. tOSLH = |tPLHm–tPLHn|, tOSHL = |tPHLm–tPHLn
|
Capacitance
T
A = +25°C
T
A = −40°C to +85°C
Min Max
10
Symbol
Parameter
Units
Min
Typ
4
Max
10
CIN
Input Capacitance
Power Dissipation Capacitance (Note 5)
pF
pF
CPD
34
Note 5: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
Average operating current can be obtained by the equation: CPD × VCC × IIN + ICC
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4
Physical Dimensions inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Package Number M16A
5
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M16D
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6
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC16
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
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FAIRCHILD’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 FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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