MC74LCX139
Dual Low−Voltage CMOS
2−to−4 Decoder/Demultiplexer
With 5V−Tolerant Inputs
The MC74LCX139 is a high performance, 2−to−4 decoder/
demultiplexer operating from a 2.3 to 3.6 V supply. High impedance
TTL compatible inputs significantly reduce current loading to input
drivers while TTL compatible outputs offer improved switching noise
performance. A V
I
specification of 5.5 V allows MC74LCX139 inputs
to be safely driven from 5 V devices. The MC74LCX139 is suitable
for memory address decoding and other TTL level bus oriented
applications.
The MC74LCX139 high−speed 2−to−4 decoder/demultiplexer
accepts two binary weighted inputs (A0, A1) and, when enabled,
provides four mutually exclusive active−LOW outputs. The LCX139
features an active low Enable input. All outputs will be HIGH unless
En is LOW. The LCX139 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 input as a strobe. The Enable inputs which are not used
must be permanently tied to ground.
Current drive capability is 24 mA at the outputs.
Features
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MARKING
DIAGRAMS
16
SOIC−16
D SUFFIX
CASE 751B
1
16
LCX139
AWLYWW
16
1
16
1
TSSOP−16
DT SUFFIX
CASE 948F
LCX
139
ALYW
•
•
•
•
•
•
1
Designed for 2.3 to 3.6 V V
CC
Operation
5 V Tolerant Inputs − Interface Capability With 5 V TTL Logic
LVTTL Compatible
LVCMOS Compatible
24 mA Balanced Output Sink and Source Capability
16
1
SOEIAJ−16
M SUFFIX
CASE 966
16
74LCX139
ALYW
Near Zero Static Supply Current (10
mA)
Substantially Reduces
System Power Requirements
•
Latchup Performance Exceeds 500 mA
1
A
L, WL
Y
W, WW
=
=
=
=
Assembly Location
Wafer Lot
Year
Work Week
•
ESD Performance:
Human Body Model >2000 V
Machine Model >200 V
•
Pb−Free Packages are Available*
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2005
1
January, 2005 − Rev. 3
Publication Order Number:
MC74LCX139/D
MC74LCX139
Ea
A0a
A1a
Y0a
Y1a
Y2a
Y3a
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
Eb
A0b
A1b
Y0b
Y1b
Y2b
Y3b
A1b 13
A0b 14
Eb 15
A1a
A0a
Ea
3
2
1
X/Y
1
2
EN
0
1
2
3
4 Y0a
5 Y1a
6 Y2a
7 Y3a
12 Y0b
11 Y1b
10 Y2b
9 Y3b
A1a
A0a
Ea
3
2
1
DMUX
0
0
G
3
1
1
0
2
3
A1b 13
A0b 14
Eb 15
4 Y0a
5 Y1a
6 Y2a
7 Y3a
12 Y0b
11 Y1b
10 Y2b
9 Y3b
Figure 1. Pin Assignment
Figure 2. IEC Logic Diagram
PIN NAMES
Pins
A0n−A1n
En
Y0n−Y3n
Function
Address Inputs
Enable Inputs
Outputs
ADDRESS
INPUTS
A0a
A1a
2
3
4
Y0a
ACTIVE−LOW
OUTPUTS
5 Y1a
6
Y2a
7
Y3a
TRUTH TABLE
Inputs
E
H
L
L
L
L
A1
X
L
L
H
H
A0
X
L
H
L
H
Y0
H
L
H
H
H
Outputs
Y1 Y2
H
H
L
H
H
H
H
H
L
H
Y3
H
H
H
H
L
ADDRESS
INPUTS
Ea
1
A0b
A1b
14
13
12
11
10
9
Y0b
Y1b
Y2b
Y3b
ACTIVE−LOW
OUTPUTS
H = High Voltage Level;
L = Low Voltage Level;
Z = High Impedance State
Eb
15
Figure 3. Logic Diagram
En
Y0
Y1
A0
Y2
Y3
A1
Figure 4. Expanded Logic Diagram
(1/2 of Device)
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2
MC74LCX139
MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
Parameter
DC Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
Value
−0.5 to +7.0
−0.5
≤
V
I
≤
+7.0
−0.5
≤
V
O
≤
V
CC
+ 0.5
−50
−50
+50
I
O
I
CC
I
GND
T
STG
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
±50
±100
±100
−65 to +150
Output in HIGH or LOW State. (Note 1)
V
I
< GND
V
O
< GND
V
O
> V
CC
Condition
Unit
V
V
V
mA
mA
mA
mA
mA
mA
°C
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. I
O
absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
I
OH
Supply Voltage
Input Voltage
Output Voltage
HIGH Level Output Current
(HIGH or LOW State)
V
CC
= 3.0 V − 3.6 V
V
CC
= 2.7 V − 3.0 V
V
CC
= 2.3 V − 2.7 V
V
CC
= 3.0 V − 3.6 V
V
CC
= 2.7 V − 3.0 V
V
CC
= 2.3 V − 2.7 V
−40
0
Parameter
Operating
Data Retention Only
Min
2.0
1.5
0
0
Typ
2.3 to 3.3
Max
3.6
3.6
5.5
V
CC
−24
−12
−8
+24
+12
+8
+85
10
Unit
V
V
V
mA
I
OL
LOW Level Output Current
mA
T
A
Dt/DV
Operating Free−Air Temperature
Input Transition Rise or Fall Rate, V
IN
from 0.8 V to 2.0 V, V
CC
= 3.0 V
°C
ns/V
ORDERING INFORMATION
Device
MC74LCX138D
MC74LCX138DR2
MC74LCX138DR2G
MC74LCX138DT
MC74LCX138DTR2
MC74LCX138M
MC74LCX138MEL
Package
SOIC−16
SOIC−16
SOIC−16
(Pb−Free)
TSSOP−16*
TSSOP−16*
SOEIAJ−16
SOEIAJ−16
Shipping
†
48 Units / Rail
2500 Tape & Reel
2500 Tape & Reel
96 Units / Rail
2500 Tape & Reel
48 Units / Rail
2000 Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*This package is inherently Pb−Free.
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3
MC74LCX139
DC ELECTRICAL CHARACTERISTICS
T
A
= −40°C to +85°C
Symbol
V
IH
Characteristic
HIGH Level Input Voltage (Note 2)
g (
)
Condition
2.3 V
≤
V
CC
≤
2.7 V
2.7 V
≤
V
CC
≤
3.6 V
V
IL
LOW Level Input Voltage (Note 2)
g (
)
2.3 V
≤
V
CC
≤
2.7 V
2.7 V
≤
V
CC
≤
3.6 V
V
OH
HIGH Level Output Voltage
g
2.3 V
≤
V
CC
≤
3.6 V; I
OL
= 100
mA
V
CC
= 2.3 V; I
OH
= −8 mA
V
CC
= 2.7 V; I
OH
= −12 mA
V
CC
= 3.0 V; I
OH
= −18 mA
V
CC
= 3.0 V; I
OH
= −24 mA
V
OL
LOW Level Output Voltage
g
2.3 V
≤
V
CC
≤
3.6 V; I
OL
= 100
mA
V
CC
= 2.3 V; I
OL
= 8 mA
V
CC
= 2.7 V; I
OL
= 12 mA
V
CC
= 3.0 V; I
OL
= 16 mA
V
CC
= 3.0 V; I
OL
= 24 mA
I
I
I
CC
DI
CC
Input Leakage Current
Quiescent Supply Current
y
2.3 V
≤
V
CC
≤
3.6 V; 0 V
≤
V
I
≤
5.5 V
2.3
≤
V
CC
≤
3.6 V; V
I
= GND or V
CC
2.3
≤
V
CC
≤
3.6 V; 3.6
≤
V
I
or V
O
≤
5.5 V
Increase in I
CC
per Input
2.3
≤
V
CC
≤
3.6 V; V
IH
= V
CC
− 0.6 V
2. These values of V
I
are used to test DC electrical characteristics only.
V
CC
− 0.2
1.7
2.2
2.4
2.2
0.2
0.7
0.4
0.4
0.55
±5
10
±10
500
mA
mA
m
mA
V
Min
1.7
2.0
0.7
0.8
V
V
Max
Unit
V
AC CHARACTERISTICS
t
R
= t
F
= 2.5 ns; C
L
= 50 pF; R
L
= 500
W
Limits
T
A
= −40°C to +85°C
V
CC
= 3.0 V to 3.6 V
C
L
= 50 pF
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
OSHL
t
OSLH
Parameter
Propagation Delay
A to Y
Propagation Delay
E to Y
Output−to−Output Skew (Note 3)
Min
0.8
0.8
0.8
0.8
Max
6.2
6.2
4.7
4.7
1.0
1.0
V
CC
= 2.7 V
C
L
= 50 pF
Min
1.0
1.0
1.0
1.0
Max
7.3
7.3
5.2
5.2
V
CC
= 2.3 V to 2.7 V
C
L
= 30pF
Min
0.8
0.8
0.8
0.8
Max
9.3
9.3
7.2
7.2
Unit
ns
ns
ns
ns
ns
ns
3. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH−to−LOW (t
OSHL
) or LOW−to−HIGH (t
OSLH
); parameter
guaranteed by design.
CAPACITIVE CHARACTERISTICS
Symbol
C
IN
C
OUT
C
PD
Parameter
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
Condition
V
CC
= 3.3 V, V
I
= 0 V or V
CC
V
CC
= 3.3 V, V
I
= 0 V or V
CC
10MHz, V
CC
= 3.3 V, V
I
= 0 V or V
CC
Typical
7
8
25
Unit
pF
pF
pF
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4
MC74LCX139
A
t
PLH
Y
50% V
CC
50%
t
PHL
Y
V
CC
GND
E
V
CC
50%
t
PHL
50% V
CC
t
PLH
GND
Figure 5. Waveform 1 Prop Delays
Figure 6. Waveform 2 Output Enable
V
CC
PULSE
GENERATOR
R
T
DUT
C
L
R
L
C
L
= 50 pF or equivalent (Includes jig and probe capacitance)
R
L
= R
1
= 500
W
or equivalent
R
T
= Z
OUT
of pulse generator (typically 50
W)
Figure 7. Test Circuit
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