Page 1
INTEGRATED CIRCUITS
74LV138
3-to-8 line decoder/multiplexer; inverting
Product specification
Supersedes data of 1997 Feb 03
IC24 Data Handbook
1998 Apr 28
Page 2
Philips Semiconductors Product specification
74L V1383-to-8 line decoder/demultiplexer; inverting
FEA TURES
•Wide operating voltage: 1.0 to 5.5 V
•Optimized for low voltage applications: 1.0 to 3.6 V
•Accepts TTL input levels between V
•Typical V
T
amb
•Typical V
T
amb
(output ground bounce) < 0.8 V at V
OLP
= 25°C
(output VOH undershoot) > 2 V at V
OHV
= 25°C
= 2.7 V and V
CC
CC
CC
CC
= 3.3 V,
= 3.3 V,
•Demultiplexing capability
•Multiple input enable for easy expansion
•Ideal for memory chip select decoding
•Active LOW mutually exclusive outputs
•Output capability: standard
•I
category: MSI
CC
QUICK REFERENCE DATA
GND = 0 V; T
= 25°C; tr = t
amb
SYMBOL
t
PHL/tPLH
C
I
C
PD
NOTES:
is used to determine the dynamic power dissipation (PD in µW)
1. C
PD
P
= CPD × V
D
= input frequency in MHz; CL = output load capacitance in pF;
f
i
f
= output frequency in MHz; VCC = supply voltage in V;
o
× V
(C
L
2
× fi (CL × V
CC
2
× fo) = sum of the outputs.
CC
≤ 2.5 ns
f
PARAMETER CONDITIONS TYPICAL UNIT
Propagation delay
An to Yn,
E3 to Yn, En to Yn
Input capacitance 3.5 pF
Power dissipation capacitance per
package
2
× fo) where:
CC
= 3.6 V
DESCRIPTION
The 74LV138 is a low-voltage Si-gate CMOS device that is pin and
function compatible with 74HC/HCT138.
The 74LV138 accepts three binary weighted address inputs (A
A
) and when enabled, provide 8 mutually exclusive active LOW
2
outputs (Y
The 74LV138 features three enable inputs: two active LOW (E1, and
E
) and one active HIGH (E3). Every output will be HIGH unless E
2
and E2 are LOW and E3 is HIGH.
This multiple enable function allows easy parallel expansion of the
74LV138 to a 1-of-32 (5 lines to 32 lines) decoder with just four
74LV138 ICs 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. The 74LV138 is identical to the 74LV238
but has non-inverting (true) outputs.
CL = 15 pF;
VCC = 3.3 V
VCC = 3.3 V
V
= GND to V
I
CC
to Y7).
0
1
12
14
45 pF
ns
ns
, A1,
0
1
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. #
16-Pin Plastic DIL –40°C to +125°C 74LV138 N 74LV138 N SOT38-4
16-Pin Plastic SO –40°C to +125°C 74LV138 D 74LV138 D SOT109-1
16-Pin Plastic SSOP Type II –40°C to +125°C 74LV138 DB 74LV138 DB SOT338-1
16-Pin Plastic TSSOP Type I –40°C to +125°C 74LV138 PW 74LV138PW DH SOT403-1
PIN CONFIGURATION
1
A
0
2
A
1
3
A
2
4
E
1
5
E
2
6
E
3
Y
7
7
GND
8
1998 Apr 28 853–1903 19290
16
15
14
13
12
11
10
9
SV00524
V
CC
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
Y
6
PIN DESCRIPTION
PIN NUMBER SYMBOL FUNCTION
1, 2, 3 A0 to A
4, 5 E1 to E
6 E
15, 14, 13, 12,
11, 10, 9, 7
3
Y
Y
0 to
8 GND Ground (0 V)
16 V
CC
2
Address inputs
2
Enable inputs (active LOW)
2
Enable inputs (active HIGH)
Outputs
7
Positive supply voltage
Page 3
Philips Semiconductors Product specification
3-to-8 line decoder/demultiplexer; inverting
LOGIC DIAGRAM
1
2
3
4
E
1
5
6
E
2
E
3
FUNCTIONAL DIAGRAM
A
0
A
1
A
2
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
Y
6
Y
7
15
14
13
12
11
10
9
7
SV00525
LOGIC SYMBOL (IEEE/IEC)
DX
0
15
1
0
2
23
4
5
6
1
14
0
G
7
&
(a)
13
2
12
3
11
4
10
5
6
9
7
7
74LV138
X
0
1
2
3
4
5
6
7
SV00526
15
14
13
12
11
10
9
7
Y
1
1
2
2
4
3
4
5
6
&
EN
(b)
Y
0
15
Y
A
0
1
A
1
2
A
3
E
4
E
5
E
6
3-to-8
2
DECODER
1
2
3
ENABLE
EXITING
1
Y
2
Y
3
Y
4
Y
5
Y
6
Y
7
SV00527
14
13
12
11
10
9
7
FUNCTION TABLE
INPUTS OUTPUTS
E
1
H X X X X X H H H H H H H H
X H X X X X H H H H H H H H
X X L X X X H H H H H H H H
L L H L L L L H H H H H H H
L L H H L L H L H H H H H H
L L H L H L H H L H H H H H
L L H H H L H H H L H H H H
L L H L L H H H H H L H H H
L L H H L H H H H H H L H H
L L H L H H H H H H H H L H
L L H H H H H H H H H H H L
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don’t care
E
2
E
3
A
A
0
1
A
2
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
Y
6
Y
7
1998 Apr 28
3
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Philips Semiconductors Product specification
3-to-8 line decoder/demultiplexer; inverting
74LV138
RECOMMENDED OPERATING CONDITIONS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT
V
V
V
T
amb
tr, t
NOTE:
1. The LV is guaranteed to function down to V
ABSOLUTE MAXIMUM RATINGS
In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0 V).
SYMBOL
V
I
I
I
DC supply voltage See Note 1 1.0 3.3 5.5 V
CC
Input voltage 0 – V
I
Output voltage 0 – V
O
Operating ambient temperature range in free air
Input rise and fall times
f
CC
See DC and AC
characteristics
VCC = 1.0V to 2.0V
VCC = 2.0V to 2.7V
VCC = 2.7V to 3.6V
VCC = 3.6V to 5.5V
= 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC = 5.5V.
–40
–40
–
–
–
–
–
–
–
–
1, 2
PARAMETER CONDITIONS RATING UNIT
CC
DC supply voltage –0.5 to +7.0 V
DC input diode current VI < –0.5 or VI > VCC + 0.5V 20 mA
IK
DC output diode current VO < –0.5 or VO > VCC + 0.5V 50 mA
OK
DC output source or sink current
O
– standard outputs
–0.5V < VO < VCC + 0.5V
25
CC
CC
+85
+125
500
200
100
50
ns/V
V
V
°C
mA
I
I
P
GND
T
TOT
stg
DC VCC or GND current for types with
,
– standard outputs 50
CC
Storage temperature range –65 to +150 °C
Power dissipation per package
– plastic DIL
– plastic mini-pack (SO)
– plastic shrink mini-pack (SSOP and TSSOP)
for temperature range: –40 to +125°C
above +70°C derate linearly with 12 mW/K
above +70°C derate linearly with 8 mW/K
above +60°C derate linearly with 5.5 mW/K
750
500
400
mA
mW
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability .
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1998 Apr 28
4
Page 5
Philips Semiconductors Product specification
V
V
V
V
voltage all out uts
V
g
V
voltage all out uts
V
g
V
3-to-8 line decoder/demultiplexer; inverting
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. V oltages are referenced to GND (ground = 0 V).
SYMBOL P ARAMETER TEST CONDITIONS
VCC = 1.2 V 0.9 0.9
IH
HIGH level Input
voltage
VCC = 2.0 V 1.4 1.4
VCC = 2.7 to 3.6 V 2.0 2.0
VCC = 4.5 to 5.5 V 0.7V
VCC = 1.2 V 0.3 0.3
IL
LOW level Input
voltage
VCC = 2.0 V 0.6 0.6
VCC = 2.7 to 3.6 V 0.8 0.8
VCC = 4.5 to 5.5 0.3V
VCC = 1.2 V; VI = VIH or V
VCC = 2.0 V; VI = VIH or V
OH
HIGH level output
;
V
VCC = 2.7 V; VI = VIH or V
p
VCC = 3.0 V; VI = VIH or V
VCC = 4.5 V; VI = VIH or V
OH
HIGH level output
voltage;
STANDARD
outputs
VCC = 3.0 V; VI = VIH or V
VCC = 4.5 V; VI = VIH or V
VCC = 1.2 V; VI = VIH or V
VCC = 2.0 V; VI = VIH or V
OL
LOW level output
;
V
VCC = 2.7 V; VI = VIH or V
p
VCC = 3.0 V; VI = VIH or V
VCC = 4.5 V; VI = VIH or V
LOW level output
voltage;
OL
STANDARD
outputs
Input leakage
I
I
current
CC
Quiescent supply
current; MSI
I
VCC = 3.0 V; VI = VIH or V
VCC = 4.5 V; VI = VIH or V
VCC = 5.5 V; VI = VCC or GND 1.0 1.0 µA
VCC = 5.5 V; VI = VCC or GND; IO = 0 20.0 160 µA
IL;
IL;
IL;
IL;
IL;
IL;
IL;
IL;
IL;
IL;
IL;
IL;
IL;
IL;
Additional
CC
quiescent supply
current per input
VCC = 2.7 V to 3.6 V; VI = VCC – 0.6 V 500 850 µA
∆I
NOTE:
1. All typical values are measured at T
amb
= 25°C.
–IO = 100µA 1.2
–IO = 100µA 1.8 2.0 1.8
–IO = 100µA 2.5 2.7 2.5
–IO = 100µA 2.8 3.0 2.8
–IO = 100µA 4.3 4.5 4.3
–IO = 6mA 2.40 2.82 2.20
–IO = 12mA 3.60 4.20 3.50
IO = 100µA 0
IO = 100µA 0 0.2 0.2
IO = 100µA 0 0.2 0.2
IO = 100µA 0 0.2 0.2
IO = 100µA 0 0.2 0.2
IO = 6mA 0.25 0.40 0.50
IO = 12mA 0.35 0.55 0.65
-40°C to +85°C -40°C to +125°C
MIN TYP
CC
LIMITS
1
MAX MIN MAX
0.7V
CC
74LV138
CC
0.3V
UNIT
CC
V
V
1998 Apr 28
5
Page 6
Philips Semiconductors Product specification
CONDITION
A
n
Y
n
E
3
Y
n
E
n
Y
n
3-to-8 line decoder/demultiplexer; inverting
AC CHARACTERISTICS
GND = 0V; tr = tf = 2.5ns; CL = 50pF; RL = 500Ω
SYMBOL PARAMETER WAVEFORM
VCC(V) MIN TYP
1.2 75
2.0 26 44 55
t
PHL/tPLH
t
PHL/tPLH
t
PHL/tPLH
Propagation delay
to
A
to Y
Propagation delay
to
E
to Y
Propagation delay
to
E
to Y
Figures 1, 3
Figures 1, 3
Figures 2, 3
NOTES:
1. Unless otherwise stated, all typical values are measured at T
2. Typical values are measured at V
3. Typical values are measured at V
= 3.3 V.
CC
= 5.0 V.
CC
2.7 19 31 39
3.0 to 3.6 15
4.5 to 5.5 –
1.2 75
2.0 26 43 53
2.7 19 30 38
3.0 to 3.6 15
4.5 to 5.5 19 24
1.2 75
2.0 26 43 53
2.7 19 30 38
3.0 to 3.6 15
4.5 to 5.5 19 24
= 25°C
amb
74LV138
LIMITS
–40 to +85 °C –40 to +125 °C
1
MAX MIN MAX
2
26 32
3
17 22
2
25 31
2
25 31
UNIT
ns
ns
ns
AC WAVEFORMS
VM = 1.5 V at VCC ≥ 2.7 V and ≤ 3.6 V;
= 0.5 V × VCC at VCC < 2.7 V and ≥ 4.5 V;
V
M
V
and VOH are the typical output voltage drop that occur with the
OL
output load.
V
CC
An, E
3
INPUT
GND
V
OH
Yn OUTPUT
V
OL
Figure 1. Input (An) and enable input (E3) to output (Yn)
V
M
t
PHL
V
M
propagation delays.
t
PLH
SV00528
V
CC
E1, E
Y
OUTPUT
n
INPUT
GND
V
V
2
t
OH
OL
PHL
V
M
t
PLH
V
M
SV00529
Figure 2. Enable input (En) to output (Yn) propagation delays.
1998 Apr 28
6
Page 7
Philips Semiconductors Product specification
3-to-8 line decoder/demultiplexer; inverting
TEST CIRCUIT
V
cc
V
V
CC
2.7V
CC
V
O
50pF
C
L
of pulse generators.
OUT
I
RL= 1k
SV00902
V
PULSE
GENERATOR
l
D.U.T.
R
T
Test Circuit for Outputs
DEFINITIONS
RL = Load resistor
CL = Load capacitance includes jig and probe capacitiance
RT = Termination resistance should be equal to Z
TEST
t
PLH/tPHL
V
CC
< 2.7V
2.7–3.6V
≥ 4.5 V V
Figure 3. Load circuitry for switching times.
74LV138
1998 Apr 28
7
Page 8
Philips Semiconductors Product specification
3-to-8 line decoder/demultiplexer; inverting
DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4
74LV138
1998 Apr 28
8
Page 9
Philips Semiconductors Product specification
3-to-8 line decoder/demultiplexer; inverting
SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
74LV138
1998 Apr 28
9
Page 10
Philips Semiconductors Product specification
3-to-8 line decoder/demultiplexer; inverting
SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1
74LV138
1998 Apr 28
10
Page 11
Philips Semiconductors Product specification
3-to-8 line decoder/demultiplexer; inverting
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT403-1
74LV138
1998 Apr 28
11
Page 12
Philips Semiconductors Product specification
3-to-8 line decoder/demultiplexer; inverting
DEFINITIONS
74LV138
Data Sheet Identification Product Status Definition
Objective Specification
Preliminary Specification
Product Specification
Formative or in Design
Preproduction Product
Full Production
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICA TIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
Philips Semiconductors
811 East Arques Avenue
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
print code Date of release: 05-96
Document order number: 9397-750-04423
1998 Apr 28
12
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