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“Standard”:
2.
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(Note 1) “Renesas Electronics” as used in this document means Renesas Electronics Corporation and also includes its majority-
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HD74AC138/HD74ACT138
1-of-8 Decoder/Demultiplexer
REJ03D0248–0200Z
(Previous ADE-205-368 (Z))
Rev.2.00
Jul.16.2004
Description
The HD74AC138/HD74ACT138 is a high-speed 1-of-8 decoder/demultiplexer. This device is ideally suited for high-
speed bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1-of-24
decoder using just three HD74AC138/HD74ACT138 devices or a 1-of-32 decoder using four
HD74AC138/HD74ACT138 devices and one inverter.
Features
•
Demultiplexing Capability
•
Multiple Input Enable for Easy Expansion
•
Active LOW Mutually Exclusive Outputs
•
Outputs Source/Sink 24 mA
•
HD74ACT138 has TTL-Compatible Inputs
•
Ordering Information: Ex. HD74AC138
Part Name
HD74AC138AP
Package Type
DIP-16 pin
Package Code Package Abbreviation Taping Abbreviation (Quantity)
DP-16E, -16FV
FP-16DAV
TTP-16DAV
P
FP
RP
T
—
EL (2,000 pcs/reel)
EL (2,500 pcs/reel)
ELL(2,000 pcs/reel)
HD74AC138AFPEL SOP-16 pin (JEITA)
HD74AC138TELL
TSSOP-16 pin
HD74AC138ARPEL SOP-16 pin (JEDEC) FP-16DNV
Notes: 1. Please consult the sales office for the above package availability.
2. The packages with lead-free pins are distinguished from the conventional products by adding V at the end of
the package code.
Pin Arrangement
A
0
1
A
1
2
A
2
3
E
1
4
E
2
5
E
3
6
O
7
7
GND 8
(Top view)
16 V
CC
15
O
0
14
O
1
13
O
2
12
O
3
11
O
4
10
O
5
9
O
6
Rev.2.00, Jul.16.2004, page 1 of 9
Embedded System
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