INTEGRATED CIRCUITS
74ALS139
Dual 1-of-4 decoder/demultiplexer
Product specification
IC05 Data Handbook
1991 Feb 08
Philips
Semiconductors
Philips Semiconductors
Product specification
Dual 1-of-4 decoder/demultiplexer
74ALS139
FEATURES
•
Demultiplexing capability
•
Two independent 1-of-4 decoders
•
Multi-function capability
DESCRIPTION
The 74ALS139 is a dual 1-of-4 decoder/demultiplexer. This device
has two independent decoders, each accepting two binary weighted
inputs (A
0n
, A
1n
) and providing four mutually exclusive active-Low
outputs (Q0n–Q3n). Each decoder has an active-Low enable (E).
When E is High, every output is forced High. The enable can be
used as the data input for a 1-of-4 demultiplexer application.
TYPICAL
SUPPLY CURRENT
(TOTAL)
4mA
PIN CONFIGURATION
Ea
A0a
A1a
Q0a
Q1a
Q2a
Q3a
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
Eb
A0b
A1b
Q0b
Q1b
Q2b
Q3b
SF00129
TYPE
74ALS139
TYPICAL
PROPAGATION DELAY
6.0ns
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
±10%,
T
amb
= 0°C to +70°C
74ALS139N
74ALS139D
DRAWING
NUMBER
16-pin plastic DIP
16-pin plastic SO
SOT38-4
SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
A0n, A1n
Ea, Eb
Q0n, Q1n
Address inputs
Enable inputs (active-Low)
Data outputs
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
1.0/1.0
1.0/1.0
20/80
LOAD VALUE
HIGH/LOW
20µA/0.1mA
20µA/0.1mA
0.4mA/8mA
NOTE:
One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
1
2
3
15
14
13
IEC/IEEE SYMBOL
DEMUX
0
3
G
1
0
3
0
1
2
5
6
7
12
11
10
2
4
Ea
A0a
A1a
Eb
A0b
A1b
DECODER a
Q0a
Q1a Q2a Q3a
Q0b
DECODER b
Q1b Q2b Q3b
1
14
13
3
4
V
CC
= Pin 16
GND = Pin 8
5
6
7
12
11
10
9
15
9
SF00130
SF00131
1991 Feb 08
2
853–1426 01670
Philips Semiconductors
Product specification
Dual 1-of-4 decoder/demultiplexer
74ALS139
LOGIC DIAGRAM
Ea
1
A0a A1a
2
3
Eb
15
A0b A1b
14
13
FUNCTION TABLE
INPUTS
E
H
L
L
L
L
A0
X
L
H
L
H
A1
X
L
L
H
H
Q0
H
L
H
H
H
OUTPUTS
Q1
H
H
L
H
H
Q2
H
H
H
L
H
Q3
H
H
H
H
L
H = High voltage level
L = Low voltage level
X = Don’t care
4
Q0a
V
CC
= Pin 16
GND = Pin 8
5
Q1a
6
Q2a
7
Q3a
12
11
Q1b
Q0b
10
9
Q2b Q3b
SF00132
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
V
CC
V
IN
I
IN
V
OUT
I
OUT
T
amb
T
stg
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
Operating free-air temperature range
Storage temperature range
PARAMETER
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to V
CC
16
0 to +70
–65 to +150
UNIT
V
V
mA
V
mA
°C
°C
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
V
CC
V
IH
V
IL
I
Ik
I
OH
I
OL
T
amb
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Operating free-air temperature range
0
PARAMETER
MIN
4.5
2.0
0.8
–18
–0.4
8
+70
NOM
5.0
MAX
5.5
V
V
V
mA
mA
mA
°C
UNIT
1991 Feb 08
3
Philips Semiconductors
Product specification
Dual 1-of-4 decoder/demultiplexer
74ALS139
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
V
OH
V
O
OL
V
IK
I
I
I
IH
I
IL
I
O
I
CC
PARAMETER
High-level output voltage
Low-level
Low level output voltage
Input clamp voltage
Input current at maximum input voltage
High-level input current
Low-level input current
Output current
3
Supply current (total)
TEST CONDITIONS
1
MIN
V
CC
±10%,
V
IL
= MAX, V
IH
= MIN, I
OH
= –0.4mA
V
CC
= MIN, V
IL
= MAX,
,
,
V
IH
= MIN
V
CC
= MIN, I
I
= I
IK
V
CC
= MAX, V
I
= 7.0V
V
CC
= MAX, V
I
= 2.7V
V
CC
= MAX, V
I
= 0.5V
V
CC
= MAX, V
O
= 2.25V
V
CC
= MAX
-30
4.0
I
OL
= 4mA
I
OL
= 8mA
V
CC
– 2
0.25
0.35
–0.73
0.40
0.50
–1.5
0.1
20
–0.1
–112
7.0
LIMITS
TYP
2
UNIT
MAX
V
V
V
V
mA
µA
mA
mA
mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25°C.
3. The output conditions have been chosen to produce a current that closely approximate one half of the true short-circuit output current, I
OS
.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITION
T
amb
= 0°C to +70°C
V
CC
= +5.0V
±
10%
C
L
= 50pF, R
L
= 500Ω
MIN
t
PLH
t
PHL
t
PLH
t
PHL
Propagation delay
An to Qn
Propagation delay
En to Qn
Waveform 1, 2
Waveform 2
3.0
3.0
3.0
3.0
MAX
10.0
12.0
8.0
8.0
ns
ns
UNIT
AC WAVEFORMS
For all waveforms, V
M
= 1.3V.
An
V
M
t
PHL
V
M
t
PLH
An, En
V
M
t
PHL
V
M
t
PLH
Qn
V
M
V
M
Qn
V
M
V
M
SF00133
SF00134
Waveform 1. Propagation Delay for Inverting Outputs
Waveform 2. Propagation Delay for Non-inverting Outputs
1991 Feb 08
4
Philips Semiconductors
Product specification
Dual 1-of-4 decoder/demultiplexer
74ALS139
TEST CIRCUIT AND WAVEFORMS
V
CC
NEGATIVE
PULSE
V
IN
PULSE
GENERATOR
R
T
D.U.T.
V
OUT
90%
V
M
10%
t
THL (
t
f
f
)
C
L
R
L
t
w
V
M
10%
t
TLH (
t
r
)
0.3V
90%
AMP (V)
t
TLH (
t
r
)
90%
t
THL (
t
f
)
AMP (V)
90%
V
M
t
w
10%
0.3V
Test Circuit for Totem-pole Outputs
POSITIVE
PULSE
10%
V
M
DEFINITIONS:
R
L
= Load resistor;
see AC electrical characteristics for value.
C
L
= Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
R
T
= Termination resistance should be equal to Z
OUT
of
pulse generators.
Input Pulse Definition
INPUT PULSE REQUIREMENTS
Family
Amplitude V
M
74ALS
3.5V
1.3V
Rep.Rate
1MHz
t
w
500ns
t
TLH
2.0ns
t
THL
2.0ns
SC00005
1991 Feb 08
5
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