74LV138
3-to-8 line decoder/demultiplexer; inverting
Rev. 5 — 5 February 2018
Product data sheet
1
General description
The 74LV138 is a low-voltage Si-gate CMOS device that is pin and function compatible
with 74HC138 and 74HCT138.
The 74LV138 is a 3-to-8 line decoder/demultiplexer. It accepts three binary weighted
address inputs (A0, A1 and A2) and, when enabled, provides eight mutually exclusive
active LOW outputs (Y0 to Y7).
There are three enable inputs: two active LOW (E1 and E2) and one active HIGH (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 device to a 1-of-32
(5 lines to 32 lines) decoder with just four 74LV138 devices and one inverter. The
74LV138 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. Unused
enable inputs must be permanently tied to their appropriate active HIGH or LOW state.
2
Features and benefits
•
•
•
•
•
•
•
•
•
•
Wide operating voltage: 1.0 V to 5.5 V
Optimized for low voltage applications: 1.0 V to 3.6 V
Accepts TTL input levels between V
CC
= 2.7 V and V
CC
= 3.6 V
Typical output ground bounce < 0.8 V at V
CC
= 3.3 V and T
amb
= 25 °C
Typical HIGH-level output voltage (V
OH
) undershoot: > 2 V at V
CC
= 3.3 V and
T
amb
= 25 °C
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Active LOW mutually exclusive outputs
ESD protection:
–
HBM JESD22-A114E exceeds 2000 V
–
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
•
•
Nexperia
3-to-8 line decoder/demultiplexer; inverting
74LV138
3
Ordering information
Package
Temperature range Name
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
-40 °C to +125 °C
-40 °C to +125 °C
-40 °C to +125 °C
-40 °C to +125 °C
SO16
SSOP16
TSSOP16
Table 1. Ordering information
Type number
74LV138D
74LV138DB
74LV138PW
74LV138BQ
DHVQFN16 plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 16 terminals;
body 2.5 x 3.5 x 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)
Figure 1. Logic symbol
Figure 2. IEC logic symbol
Y0
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
15
14
13
12
11
10
9
7
Figure 3. Functional diagram
74LV138
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2018. All rights reserved.
Product data sheet
Rev. 5 — 5 February 2018
2 / 17
Nexperia
3-to-8 line decoder/demultiplexer; inverting
74LV138
5
Pinning information
5.1 Pinning
74LV138
terminal 1
index area
A1
A2
E1
2
3
4
5
6
7
8
GND
Y6
9
V
CC(1)
16 V
CC
15 Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
A0
1
A0
A1
A2
E1
E2
E3
Y7
GND
1
2
3
4
5
6
7
8
001aad033
16 V
CC
15 Y0
14 Y1
E2
E3
Y7
138
13 Y2
12 Y3
11 Y4
10 Y5
9
Y6
001aah106
Transparent top view
(1) This is not a supply pin. The substrate is attached
to this pad using conductive die attach material. There
is no electrical or mechanical requirement to solder this
pad.However, if it is soldered, the solder land should remain
floating or be connected to V
CC
.
Figure 5. Pin configuration DHVQFN16
Figure 4. Pin configuration SO16 and (T)SSOP16
5.2 Pin description
Table 2. Pin description
Symbol
A0
A1
A2
E1
E2
E3
GND
Y0 to Y7
V
CC
Pin
1
2
3
4
5
6
8
15, 14, 13, 12, 11, 10, 9, 7
16
Description
address input
address input
address input
enable input (active LOW)
enable input (active LOW)
enable input (active HIGH)
ground (0 V)
output
supply voltage
74LV138
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2018. All rights reserved.
Product data sheet
Rev. 5 — 5 February 2018
3 / 17
Nexperia
3-to-8 line decoder/demultiplexer; inverting
74LV138
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
L
L
L
L
L
L
L
E2
X
H
X
L
L
L
L
L
L
L
L
E3
X
X
L
H
H
H
H
H
H
H
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
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
T
amb
= -40 °C to +125 °C
SO16 package
(T)SSOP16 package
DHVQFN16 package
[1]
[2]
[3]
[4]
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
P
tot
derates linearly with 8 mW/K above 70 °C.
P
tot
derates linearly with 5.5 mW/K above 60 °C.
P
tot
derates linearly with 4.5 mW/K above 60 °C.
[2]
[3]
[4]
Conditions
V
I
< -0.5 V or V
I
> V
CC
+ 0.5 V
V
O
< -0.5 V or V
O
> V
CC
+ 0.5 V
V
O
= -0.5 V to (V
CC
+ 0.5 V)
[1]
[1]
Min
-0.5
-
-
-
-
-50
-65
-
-
-
Max
+7.0
±20
±50
±25
50
-
+150
500
500
500
Unit
V
mA
mA
mA
mA
mA
°C
mW
mW
mW
74LV138
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2018. All rights reserved.
Product data sheet
Rev. 5 — 5 February 2018
4 / 17
Nexperia
3-to-8 line decoder/demultiplexer; inverting
74LV138
8
Recommended operating conditions
Table 5. Recommended operating conditions
Voltages are referenced to GND (ground = 0 V).
Symbol
V
CC
V
I
V
O
T
amb
Δt/ΔV
Parameter
supply voltage
input voltage
output voltage
ambient temperature
input transition rise and fall rate
V
CC
= 1.0 V to 2.0 V
V
CC
= 2.0 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
V
CC
= 3.6 V to 5.5 V
Conditions
[1]
Min
1.0
0
0
-40
-
-
-
-
Typ
3.3
-
-
+25
-
-
-
-
Max
5.5
V
CC
V
CC
+125
500
200
100
50
Unit
V
V
V
°C
ns/V
ns/V
ns/V
ns/V
[1] The static characteristics are guaranteed from V
CC
= 1.2 V to V
CC
= 5.5 V, but LV devices are guaranteed to function down to V
CC
= 1.0 V (with input levels
GND or V
CC
).
9
Static characteristics
Table 6. Static characteristics
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
IH
HIGH-level input voltage
Conditions
V
CC
= 1.2 V
V
CC
= 2.0 V
V
CC
= 2.7 V to 3.6 V
V
CC
= 4.5 V to 5.5 V
V
IL
LOW-level input voltage
V
CC
= 1.2 V
V
CC
= 2.0 V
V
CC
= 2.7 V to 3.6 V
V
CC
= 4.5 V to 5.5 V
V
OH
HIGH-level output voltage
V
I
= V
IH
or V
IL
l
O
= -100 μA; V
CC
= 1.2 V
l
O
= -100 μA; V
CC
= 2.0 V
l
O
= -100 μA; V
CC
= 2.7 V
l
O
= -100 μA; V
CC
= 3.0 V
l
O
= -100 μA; V
CC
= 4.5 V
l
O
= -6 mA; V
CC
= 3.0 V
l
O
= -12 mA; V
CC
= 4.5 V
-
1.8
2.5
2.8
4.3
2.4
3.6
1.2
2.0
2.7
3.0
4.5
2.82
4.2
-
-
-
-
-
-
-
-
1.8
2.5
2.8
4.3
2.2
3.5
-
-
-
-
-
-
-
V
V
V
V
V
V
V
-40 °C to +85 °C
Min
0.9
1.4
2.0
0.7V
CC
-
-
-
-
Typ
-
-
-
-
-
-
-
-
[1]
-40 °C to +125 °C Unit
Min
0.9
1.4
2.0
0.7V
CC
-
-
-
-
Max
-
-
-
-
0.3
0.6
0.8
V
V
V
V
V
V
V
Max
-
-
-
-
0.3
0.6
0.8
0.3V
CC
0.3V
CC
V
74LV138
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2018. All rights reserved.
Product data sheet
Rev. 5 — 5 February 2018
5 / 17
stm32/stm8
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
