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HD74LV138A
3-to-8 line Decoder / Demultiplexers
ADE-205-261 (Z)
1st Edition
March 1999
Description
The HD74LV138A is designed to be used in high-performance memory-decoding or data-routing
applications requiring very short propagation delay times. The conditions at the binary-select inputs and
the three enable inputs select one of eight input lines.
Two active-low and one active-high enable inputs reduce the need for external gates or inverters when
expanding. A 24-line decoder can be implemented without external inverters and a 32-line decoder
requires only one inverter.
An enable input can be used as a data input for demultiplexing applications.
Low-voltage and high-speed operation is suitable for the battery-powered products (e.g., notebook
computers), and the low-power consumption extends the battery life.
Features
• VCC = 2.0 V to 5.5 V operation
• All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)
• All outputs VO (Max.) = 5.5 V (@VCC = 0 V)
• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
• Typical VOH undershoot > 2.3 V (@VCC = 3.3 V, Ta = 25°C)
• Output current ±6 mA (@VCC = 3.0 V to 3.6 V), ±12 mA (@VCC = 4.5 V to 5.5 V)
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HD74LV138A
Function Table
Enable Inputs Select Inputs Outputs
G1 G2A G2BC B A Y0Y1Y2Y3Y4Y5Y6Y7
XHXXXXHHHHHHHH
XXHXXXHHHHHHHH
LXXXXXHHHHHHHH
HLL LLLL HHHHHHH
HLL LLHHLHHHHHH
HLL LHLHHLHHHHH
HLL LHHHHHL HHHH
HLL HLL HHHHLHHH
HLL HLHHHHHHL HH
HLL HHLHHHHHHLH
HLL HHHHHHHHHHL
Note: H: High level
L: Low level
X: Immaterial
Pin Arrangement
G2A
G2B
G1
Y7
GND
V
1
A
2
B
3
C
4
5
6
7
8
(Top view)
16
15
14
13
12
11
10
CC
Y0
Y1
Y2
Y3
Y4
Y5
9
Y6
2
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HD74LV138A
Absolute Maximum Ratings
Item Symbol Ratings Unit Conditions
Supply voltage range V
Input voltage range*
Output voltage range*
1
1, 2
Input clamp current I
Output clamp current I
Continuous output current I
Continuous current through
V
or GND
CC
Maximum power dissipation
at Ta = 25°C (in still air)*
3
CC
V
I
V
O
IK
OK
O
or I
I
CC
GND
P
T
Storage temperature Tstg –65 to 150 °C
Notes: The absolute maximum ratings are values which must not individually be exceeded, and furthermore,
no two of which may be realized at the same time.
1. The input and output voltage ratings mayÇΩ be exceeded if the input and output clamp-current
ratings are observed.
2. This value is limited to 5.5 V maximum.
3. The maximum package power dissipation was calculated using a junction temperature of 150°C.
–0.5 to 7.0 V
–0.5 to 7.0 V
–0.5 to VCC + 0.5 V Output: H or L
–0.5 to 7.0 VCC: OFF
–20 mA VI < 0
±50 mA VO < 0 or VO > V
±25 mA VO = 0 to V
CC
±50 mA
785 mW SOP
500 TSSOP
CC
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HD74LV138A
Recommended Operating Conditions
Item Symbol Min Max Unit Conditions
Supply voltage range V
Input voltage range V
Output voltage range V
Output current I
CC
I
O
OH
I
OL
Input transition rise or fall rate ∆t/∆v 0 200 ns/V VCC = 2.3 to 2.7 V
Operating free-air temperature Ta –40 85 °C
Note: Unused or floating inputs must be held high or low.
2.0 5.5 V
0 5.5 V
0VCCV H or L
— –50 µAV
—–2 mAV
—–6 V
= 2.0 V
CC
= 2.3 to 2.7 V
CC
= 3.0 to 3.6 V
CC
— –12 VCC = 4.5 to 5.5 V
—50 µAV
= 2.0 V
CC
— 2 mA VCC = 2.3 to 2.7 V
—6 V
—12 V
= 3.0 to 3.6 V
CC
= 4.5 to 5.5 V
CC
0 100 VCC = 3.0 to 3.6 V
020 V
= 4.5 to 5.5 V
CC
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Logic Diagram
Select
inputs
HD74LV138A
15
14
13
12
11
10
9
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Data
outputs
1
A
2
B
3
C
Enable
inputs
G2A
G2B
G1
4
5
6
7
Y7
5
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HD74LV138A
DC Electrical Characteristics
• Ta = –40 to 85°C
Item Symbol VCC (V)* Min Typ Max Unit Test Conditions
Input voltage V
Output voltage V
Input current I
Quiescent
IH
V
IL
OH
V
OL
IN
I
CC
supply current
Output leakage
I
OFF
current
Input
C
IN
capacitance
Note: For conditions shown as Min or Max, use the appropriate values under recommended operating
conditions.
2.0 1.5 — — V
2.3 to 2.7 VCC × 0.7 — —
3.0 to 3.6 VCC × 0.7 — —
4.5 to 5.5 VCC × 0.7 — —
2.0 — — 0.5
2.3 to 2.7 — — VCC × 0.3
3.0 to 3.6 — — VCC × 0.3
4.5 to 5.5 — — VCC × 0.3
Min to
VCC – 0.1 — — V IOH = –50 µA
Max
2.3 2.0 — — IOH = –2 mA
3.0 2.48 — — IOH = –6 mA
4.5 3.8 — — IOH = –12 mA
Min to
— — 0.1 IOL = 50 µA
Max
2.3 — — 0.4 IOL = 2 mA
3.0 — — 0.44 IOL = 6 mA
4.5 — — 0.55 IOL = 12 mA
0 to 5.5 — — ±1 µAVI = 5.5 V or GND
5.5 — — 20 µAVI = VCC or GND, IO = 0
0——5 µAVI or VO = 0 V to 5.5 V
3.3 — 1.7 — pF VI = VCC or GND
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Switching Characteristics
• VCC = 2.5 ± 0.2 V
Ta = 25°C Ta = –40 to 85°C
Item Symbol Min Typ Max Min Max Unit Test Conditions
Propagation
delay
time
• VCC = 3.3 ± 0.3 V
Item Symbol Min Typ Max Min Max Unit Test Conditions
Propagation
delay
time
t
PLH
t
PHL
— 11.7 17.6 1.0 21.0 ns CL = 15 pF A, B,CY
— 14.9 21.4 1.0 25.0 CL = 50 pF
— 12.3 19.2 1.0 22.0 CL = 15 pF G1
— 15.7 22.6 1.0 26.0 CL = 50 pF
— 11.4 18.2 1.0 21.0 CL = 15 pF G2A,
— 14.8 22.0 1.0 25.0 CL = 50 pF
Ta = 25°C Ta = –40 to 85°C
t
PLH
t
PHL
— 8.1 11.4 1.0 13.5 ns CL = 15 pF A, B,CY
— 10.3 15.8 1.0 18.0 CL = 50 pF
— 8.4 12.8 1.0 15.0 CL = 15 pF G1
— 10.6 16.3 1.0 18.5 CL = 50 pF
— 7.8 11.4 1.0 13.5 CL = 15 pF G2A,
— 10.0 14.9 1.0 17.0 CL = 50 pF
HD74LV138A
FROM
(Input)TO(Output)
G2B
FROM
(Input)TO(Output)
G2B
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HD74LV138A
Switching Characteristics (cont)
• VCC = 5.0 ± 0.5 V
Ta = 25°C Ta = –40 to 85°C
Item Symbol Min Typ Max Min Max Unit Test Conditions
Propagation
delay
time
Operating Characteristics
t
PLH
t
PHL
— 5.6 8.1 1.0 9.5 ns CL = 15 pF A, B,CY
— 7.0 10.1 1.0 11.5 CL = 50 pF
— 5.7 8.1 1.0 9.5 CL = 15 pF G1
— 7.1 10.1 1.0 11.5 CL = 50 pF
— 5.4 8.1 1.0 9.5 CL = 15 pF G2A,
— 6.8 10.1 1.0 11.5 CL = 50 pF
FROM
(Input)TO(Output)
G2B
• CL = 50 pF
Item Symbol V
Power
dissipation
capacitance
C
PD
Ta = 25°C
(V) Min Typ Max Unit Test Conditions
CC
3.3 — 16.8 — pF f = 10 MHz
5.0 — 19.1 —
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Test Circuit
Measurement point
*
C
L
HD74LV138A
• Waveform
Input
In phase output
Out of phase output
Notes:
1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t ≤ 3 ns, t ≤ 3 ns
2. The output is measured one at a time with one transition per measurement.
Note: C includes the probe and jig capacitance.
10%
t
r
50% V
L
90%
t
t
CC
PLH
PHL
90%
50% V
50% V
50% V
CC
CC
CC
t
f
10%
r
f
t
PHL
50% V
t
PLH
50% V
CC
CC
V
0 V
V
V
V
V
CC
OH
OL
OH
OL
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HD74LV138A
Package Dimensions
16
10.06
10.5 Max
9
5.5
1
0.80 Max
1.27
0.42 ± 0.08
± 0.06
0.40
Dimension including the plating thickness
Base material dimension
8
0.12
0.10 ± 0.10
0.15
M
2.20 Max
7.80
0.22 ± 0.05
0.20 ± 0.04
0.70 ± 0.20
Hitachi Code
JEDEC
EIAJ
Weight
(reference value)
+ 0.20
– 0.30
1.15
0
° – 8°
FP-16DA
—
Conforms
0.24 g
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16
HD74LV138A
Unit: mm
9.9
10.3 Max
9
1
1.27
0.635 Max
0.42 ± 0.08
0.40 ± 0.06
Dimension including the plating thickness
Base material dimension
8
0.25
+ 0.11
– 0.04
0.14
0.15
3.95
1.75 Max
M
6.10
1.08
0.20 ± 0.03
*0.22 ± 0.03
0.60
Hitachi Code
JEDEC
EIAJ
Weight
+ 0.10
– 0.30
0° – 8°
+ 0.67
– 0.20
(reference value)
FP-16DN
Conforms
Conforms
0.15 g
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HD74LV138A
0.22
0.20 ± 0.06
5.0
5.3 Max
16 9
4.40
18
0.65
+ 0.08
– 0.07
0.13
0.65 Max
1.0
M
6.40 ± 0.20
0.10
1.10 Max
Dimension including the plating thickness
Base material dimension
0.17 ± 0.05
0.15 ± 0.04
+0.03
–0.04
0.07
0° – 8°
Hitachi Code
JEDEC
EIAJ
Weight
(reference value)
0.50 ± 0.10
TTP-16DA
—
—
0.05 g
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Cautions
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copyright, trademark, or other intellectual property rights for information contained in this document.
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intellectual property rights, in connection with use of the information contained in this document.
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received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.
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