DataSheet26.com

HD74AC138 PDF даташит

Спецификация HD74AC138 изготовлена ​​​​«Renesas» и имеет функцию, называемую «1-of-8 Decoder/Demultiplexer».

Детали детали

Номер произв HD74AC138
Описание 1-of-8 Decoder/Demultiplexer
Производители Renesas
логотип Renesas логотип 

10 Pages
scroll

No Preview Available !

HD74AC138 Даташит, Описание, Даташиты
HD74AC138/HD74ACT138
1-of-8 Decoder/Demultiplexer
REJ03D02480200Z
(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
Package Type Package Code Package Abbreviation Taping Abbreviation (Quantity)
HD74AC138AP DIP-16 pin
DP-16E, -16FV P
HD74AC138AFPEL SOP-16 pin (JEITA) FP-16DAV
FP
EL (2,000 pcs/reel)
HD74AC138ARPEL SOP-16 pin (JEDEC) FP-16DNV
RP
EL (2,500 pcs/reel)
HD74AC138TELL TSSOP-16 pin
TTP-16DAV
T
ELL(2,000 pcs/reel)
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
A0 1
A1 2
A2 3
E1 4
E2 5
E3 6
O7 7
GND 8
(Top view)
16 VCC
15 O0
14 O1
13 O2
12 O3
11 O4
10 O5
9 O6
Rev.2.00, Jul.16.2004, page 1 of 9









No Preview Available !

HD74AC138 Даташит, Описание, Даташиты
HD74AC138/HD74ACT138
Logic Symbol
A0 A1 A2
E1 E2 E3
O0 O1 O2 O3 O4 O5 O6 O7
Pin Names
A0 to A2
E1 to E 2
E3
O0 to O 7
Address Inputs
Enable Inputs
Enable Input
Outputs
Functional Description
The HD74AC138/HD74ACT138 high-speed 1-of-8 decoder/demultiplexer accepts three binary weighted inputs (A0, A1,
A2) and, when enabled, provides eight mutually exclusive active-LOW outputs (O0 to O7). The
HD74AC138/HD74ACT138 features three Enable inputs, two active-Low (E1, E2) and one active-High (E3). All
outputs will be High unless E1 and E2 are Low and E3 is High. This multiple enabled function allows easy parallel
expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four HD74AC138/HD74ACT138 devices
and one inverter (See Figure a). The HD74AC138/HD74ACT138 can be used as an 8-output demultiplexer by using
one of the active Low Enable inputs as the data input and the other Enable inputs as strobes. The Enables inputs which
are not used must be permanently tied to their appropriate active-High or active-Low state.
Truth Table
Inputs
E1 E 2
HX
E3
X
A0
X
XH X X
XX L X
LL
HL
LL
HH
LL
HL
LL
HH
LL
HL
LL
HH
LL
HL
LL
HH
H : High Voltage Level
L : Low Voltage Level
X : Immaterial
A1
X
X
X
L
L
H
H
L
L
H
H
A2
X
X
X
L
L
L
L
H
H
H
H
O0
H
H
H
L
H
H
H
H
H
H
H
O1
H
H
H
H
L
H
H
H
H
H
H
O2
H
H
H
H
H
L
H
H
H
H
H
Outputs
O3
H
O4
H
HH
HH
HH
HH
HH
LH
HL
HH
HH
HH
O5
H
H
H
H
H
H
H
H
L
H
H
O6
H
H
H
H
H
H
H
H
H
L
H
O7
H
H
H
H
H
H
H
H
H
H
L
Rev.2.00, Jul.16.2004, page 2 of 9









No Preview Available !

HD74AC138 Даташит, Описание, Даташиты
HD74AC138/HD74ACT138
Logic Diagram
A2 A1 A0
E1 E2 E3
O7 O6 O5 O4 O3 O2 O1 O0
Please note that this diagram is provided only for the understanding of logic operations and should not be
used to estimate propagation delays.
Figure a: Expansion of 1-of-32 Decoding
A0
A1
A2
A3
A4
A0 A1 A2
H
123
E
A0 A1 A2
123
E
A0 A1 A2
123
E
Õ04
A0 A1 A2
123
E
O0 O1 O2 O3O4 O5 O6 O7
O0 O1 O2 O3O4 O5 O6 O7
O0 O1 O2 O3O4 O5 O6 O7
O0 O1 O2 O3O4 O5 O6 O7
O0 O31
Absolute Maximum Ratings
Item
Supply voltage
DC input diode current
DC input voltage
DC output diode current
DC output voltage
DC output source or sink current
DC VCC or ground current per output pin
Storage temperature
Symbol
VCC
IIK
VI
IOK
VO
IO
ICC, IGND
Tstg
Ratings
–0.5 to 7
–20
20
–0.5 to Vcc+0.5
–50
50
–0.5 to Vcc+0.5
±50
±50
–65 to +150
Unit
V
mA
mA
V
mA
mA
V
mA
mA
°C
Condition
VI = –0.5V
VI = Vcc+0.5V
VO = –0.5V
VO = Vcc+0.5V
Rev.2.00, Jul.16.2004, page 3 of 9










Скачать PDF:

[ HD74AC138.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
HD74AC1381-of-8 Decoder/DemultiplexerHitachi Semiconductor
Hitachi Semiconductor
HD74AC1381-of-8 Decoder/DemultiplexerRenesas
Renesas
HD74AC139Dual 1-of-4 Decoder/DemultiplexerHitachi Semiconductor
Hitachi Semiconductor

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск