RD74LVC138B
3-to-8-line Decoder / Demultiplexer
REJ03D0502鈥?200
Rev.2.00
Jan. 14, 2005
Description
The RD74LVC138B has three binary select inputs in a 16 pin package. If the device is enabled these inputs determine
which one of the eight normally high outputs will go low. Two active low and one active high enables are provided to
ease the cascading of decoders. Low voltage and high-speed operation is suitable at the battery drive product (note type
personal computer) and low power consumption extends the life of a battery for long time operation.
Features
V
CC
= 1.65 V to 5.5 V
All inputs V
IH
(Max.) = 5.5 V (@V
CC
= 0 V to 5.5 V)
Typical V
OL
ground bounce < 0.8 V (@V
CC
= 3.3 V, Ta = 25擄C)
Typical V
OH
undershoot > 2.0 V (@V
CC
= 3.3 V, Ta = 25擄C)
High output current 鹵4 mA (@V
CC
= 1.65 V)
鹵8 mA (@V
CC
= 2.3 V)
鹵12 mA (@V
CC
= 2.7 V)
鹵24 mA (@V
CC
= 3.0 V to 5.5 V)
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Ordering Information
Part Name
RD74LVC138BFPEL
RD74LVC138BTELL
Package Type
SOP鈥?6 pin (JEITA)
TSSOP鈥?6 pin
Package Code
FP鈥?6DAV
TTP鈥?6DAV
FP
T
Package
Abbreviation
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
ELL (2,000 pcs/reel)
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鈥?/div>
鈥?/div>
鈥?/div>
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Function Table
Inputs
Enable
G1
X
X
L
H
H
H
H
H
H
H
H
H:
L:
X:
G2A
X
H
X
L
L
L
L
L
L
L
L
Low level
Immaterial
G2B
H
X
X
L
L
L
L
L
L
L
L
C
X
X
X
L
L
L
L
H
H
H
H
Select
B
X
X
X
L
L
H
H
L
L
H
H
A
X
X
X
L
H
L
H
L
H
L
H
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
Outputs
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
High level
Rev.2.00 Jan. 14, 2005 page 1 of 7
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