74LVC138A
Rev. 7 — 28 August 2020
3-to-8 line decoder/demultiplexer; inverting
Product data sheet
1. General description
The 74LVC138A decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually
exclusive outputs (Y0 to Y7). The 74LVC138A features three enable inputs (E1, E2 and E3). Every
output will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function
allows easy parallel expansion of the 74LVC138A to a 1-of-32 (5 to 32 lines) decoder with just four
74LVC138A ICs and one inverter. The 74LVC138A can be used as an eight output demultiplexer
by using one of the active LOW enable inputs as the data input and the remaining enable inputs as
strobes. Inputs can be driven from either 3.3 V or 5 V devices. This feature allows the use of these
devices as translators in mixed 3.3 V and 5 V environments.
Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall times.
2. Features and benefits
•
•
•
•
•
•
•
•
•
•
Overvoltage tolerant inputs to 5.5 V
Wide supply voltage range from 1.2 V to 3.6 V
CMOS low power consumption
Direct interface with TTL levels
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Mutually exclusive outputs
Output drive capability 50 Ω transmission lines at 125 °C
Complies with JEDEC standard:
•
JESD8-7A (1.65 V to 1.95 V)
•
JESD8-5A (2.3 V to 2.7 V)
•
JESD8-C/JESD36 (2.7 V to 3.6 V)
ESD protection:
•
HBM JESD22-A114F exceeds 2000 V
•
MM JESD22-A115-B exceeds 200 V
•
CDM JESD22-C101E exceeds 1000 V
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
•
•
Nexperia
74LVC138A
3-to-8 line decoder/demultiplexer; inverting
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range
74LVC138AD
74LVC138ADB
-40 °C to +125 °C
-40 °C to +125 °C
Name
SO16
SSOP16
TSSOP16
Description
plastic small outline package; 16 leads;
body width 3.9 mm
plastic shrink small outline package; 16 leads;
body width 5.3 mm
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
Version
SOT109-1
SOT338-1
SOT403-1
SOT763-1
74LVC138APW -40 °C to +125 °C
74LVC138ABQ
-40 °C to +125 °C
DHVQFN16 plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 16 terminals;
body 2.5 × 3.5 × 0.85 mm
4. Functional diagram
DX
1
1
2
3
E1
E2
E3
A0
A1
A2
Y0
Y1
Y2
Y3
4
5
6
Y4
Y5
Y6
Y7
mna370
0
1
15
14
13
12
11
10
9
7
4
5
6
&
1
2
3
1
2
4
X/Y
0
1
2
3
4
5
15
14
13
12
11
10
9
7
0
G
2
0
7
15
14
13
12
11
10
9
7
2
3
2
3
4
4
5
6
&
5
6
7
(a)
EN
6
7
mna371
(b)
Fig. 1.
Logic symbol
Fig. 2.
IEC logic symbol
Y0
15
14
13
12
11
10
9
7
1
2
3
A0
A1
A2
3-to-8
DECODER
ENABLE
EXITING
Y1
Y2
Y3
Y4
Y5
Y6
Y7
4
5
6
E1
E2
E3
mna372
Fig. 3.
Functional diagram
74LVC138A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2020. All rights reserved
Product data sheet
Rev. 7 — 28 August 2020
2 / 15
Nexperia
74LVC138A
3-to-8 line decoder/demultiplexer; inverting
5. Pinning information
5.1. Pinning
74LVC138A
A0
A1
A2
E1
E2
E3
Y7
GND
1
2
3
4
5
6
7
8
001aad033
16 V
CC
15 Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
9
Y6
74LVC138A
A0
A1
A2
E1
E2
E3
Y7
GND
1
2
3
4
5
6
7
8
aaa-029538
16 V
CC
15 Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
9
Y6
Fig. 4.
Pin configuration SOT109-1 (SO16)
terminal 1
index area
A1
A2
E1
E2
E3
Y7
2
3
4
5
6
7
Fig. 5.
74LVC138A
16 V
CC
A0
Pin configuration SOT338-1 (SSOP16) and
SOT403-1 (TSSOP16)
1
15 Y0
14 Y1
13 Y2
12 Y3
GND
(1)
8
9
Y6
11 Y4
10 Y5
GND
001aad035
Transparent top view
(1) This is not a ground pin. There is no electrical or mechanical requirement to solder the pad. In case soldered,
the solder land should remain floating or connected to GND.
Fig. 6.
Pin configuration SOT763-1 (DHVQFN16)
5.2. Pin description
Table 2. Pin description
Symbol
A0, A1, A2
E1, E2
E3
GND
Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7
V
CC
Pin
1, 2, 3
4, 5
6
8
15, 14, 13, 12, 11, 10, 9, 7
16
Description
address input
enable input (active LOW)
enable input (active HIGH)
ground (0 V)
output
supply voltage
74LVC138A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2020. All rights reserved
Product data sheet
Rev. 7 — 28 August 2020
3 / 15
Nexperia
74LVC138A
3-to-8 line decoder/demultiplexer; inverting
6. Functional description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level; X = don’t care
Input
E1
H
X
X
L
E2
X
H
X
L
E3
X
X
L
H
A0
X
X
X
L
H
L
H
L
H
L
H
A1
X
X
X
L
L
H
H
L
L
H
H
A2
X
X
X
L
L
L
L
H
H
H
H
Output
Y0
H
H
H
L
H
H
H
H
H
H
H
Y1
H
H
H
H
L
H
H
H
H
H
H
Y2
H
H
H
H
H
L
H
H
H
H
H
Y3
H
H
H
H
H
H
L
H
H
H
H
Y4
H
H
H
H
H
H
H
L
H
H
H
Y5
H
H
H
H
H
H
H
H
L
H
H
Y6
H
H
H
H
H
H
H
H
H
L
H
Y7
H
H
H
H
H
H
H
H
H
H
L
7. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
CC
I
IK
V
I
I
OK
V
O
I
O
I
CC
I
GND
T
stg
P
tot
[1]
[2]
[3]
Conditions
V
I
< 0 V
[1]
V
O
> V
CC
or V
O
< 0 V
output HIGH or LOW state
V
O
= 0 V to V
CC
[2]
Min
-0.5
-50
-0.5
-
-0.5
-
-
-100
-65
Max
+6.5
-
+6.5
±50
V
CC
+ 0.5
±50
100
-
+150
500
Unit
V
mA
V
mA
V
mA
mA
mA
°C
mW
supply voltage
input clamping current
input voltage
output clamping current
output voltage
output current
supply current
ground current
storage temperature
total power dissipation
T
amb
= -40 °C to +125 °C
[3]
-
The minimum input voltage ratings may be exceeded if the input current ratings are observed.
The output voltage ratings may be exceeded if the output current ratings are observed.
For SOT109-1 (SO16) package: P
tot
derates linearly with 12.4 mW/K above 110 °C.
For SOT338-1 (SSOP16) package: P
tot
derates linearly with 8.5 mW/K above 91 °C.
For SOT403-1 (TSSOP16) package: P
tot
derates linearly with 8.5 mW/K above 91 °C.
For SOT763-1 (DHVQFN16) package: P
tot
derates linearly with 11.2 mW/K above 106 °C.
74LVC138A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2020. All rights reserved
Product data sheet
Rev. 7 — 28 August 2020
4 / 15
Nexperia
74LVC138A
3-to-8 line decoder/demultiplexer; inverting
8. Recommended operating conditions
Table 5. Recommended operating conditions
Symbol Parameter
V
CC
V
I
V
O
T
amb
Δt/ΔV
supply voltage
functional
input voltage
output voltage
ambient temperature
input transition rise and fall rate
V
CC
= 1.65 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
output HIGH or LOW state
Conditions
Min
1.65
1.2
0
0
-40
0
0
Typ
-
-
-
-
-
-
-
Max
3.6
-
5.5
V
CC
+125
20
10
Unit
V
V
V
V
°C
ns/V
ns/V
9. Static characteristics
Table 6. Static characteristics
At recommended operating conditions. Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
IH
HIGH-level
input voltage
Conditions
Min
V
CC
= 1.2 V
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
V
IL
LOW-level
input voltage
V
CC
= 1.2 V
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
V
OH
HIGH-level
output voltage
V
I
= V
IH
or V
IL
I
O
= -100 μA;
V
CC
= 1.65 V to 3.6 V
I
O
= -4 mA; V
CC
= 1.65 V
I
O
= -8 mA; V
CC
= 2.3 V
I
O
= -12 mA; V
CC
= 2.7 V
I
O
= -18 mA; V
CC
= 3.0 V
I
O
= -24 mA; V
CC
= 3.0 V
V
OL
LOW-level
output voltage
V
I
= V
IH
or V
IL
I
O
= 100 μA;
V
CC
= 1.65 V to 3.6 V
I
O
= 4 mA; V
CC
= 1.65 V
I
O
= 8 mA; V
CC
= 2.3 V
I
O
= 12 mA; V
CC
= 2.7 V
I
O
= 24 mA; V
CC
= 3.0 V
I
I
I
CC
input leakage
current
supply current
V
CC
= 3.6 V; V
I
= 5.5 V or GND
V
CC
= 3.6 V; V
I
= V
CC
or GND;
I
O
= 0 A
-
-
-
-
-
-
-
-
-
-
-
-
±0.1
0.1
0.2
0.45
0.6
0.4
0.55
±5
10
-
-
-
-
-
-
-
0.3
0.65
0.8
0.6
0.8
±20
40
V
V
V
V
V
μA
μA
V
CC
- 0.2
1.2
1.8
2.2
2.4
2.2
-
-
-
-
-
-
-
-
-
-
-
-
V
CC
- 0.3
1.05
1.65
2.05
2.25
2.0
-
-
-
-
-
-
V
V
V
V
V
V
1.08
0.65V
CC
1.7
2.0
-
-
-
-
-40 °C to +85 °C
Typ
[1]
-
-
-
-
-
-
-
-
Max
-
-
-
-
0.12
0.35V
CC
0.7
0.8
-40 °C to +125 °C
Min
1.08
0.65V
CC
1.7
2.0
-
-
-
-
Max
-
-
-
-
0.12
0.7
0.8
V
V
V
V
V
V
V
Unit
0.35V
CC
V
74LVC138A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2020. All rights reserved
Product data sheet
Rev. 7 — 28 August 2020
5 / 15
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