DataSheet26.com

74LS155 PDF даташит

Спецификация 74LS155 изготовлена ​​​​«Fairchild Semiconductor» и имеет функцию, называемую «Dual 2-Line to 4-Line Decoders/Demultiplexers».

Детали детали

Номер произв 74LS155
Описание Dual 2-Line to 4-Line Decoders/Demultiplexers
Производители Fairchild Semiconductor
логотип Fairchild Semiconductor логотип 

6 Pages
scroll

No Preview Available !

74LS155 Даташит, Описание, Даташиты
August 1986
Revised April 2000
DM74LS155 • DM74LS156
Dual 2-Line to 4-Line Decoders/Demultiplexers
General Description
These TTL circuits feature dual 1-line-to-4-line demultiplex-
ers with individual strobes and common binary-address
inputs in a single 16-pin package. When both sections are
enabled by the strobes, the common address inputs
sequentially select and route associated input data to the
appropriate output of each section. The individual strobes
permit activating or inhibiting each of the 4-bit sections as
desired. Data applied to input C1 is inverted at its outputs
and data applied at C2 is true through its outputs. The
inverter following the C1 data input permits use as a 3-to-8-
line decoder, or 1-to-8-line demultiplexer, without external
gating. Input clamping diodes are provided on these cir-
cuits to minimize transmission-line effects and simplify sys-
tem design.
Features
s Applications:
Dual 2-to-4-line decoder
Dual 1-to-4-line demultiplexer
3-to-8-line decoder
1-to-8-line demultiplexer
s Individual strobes simplify cascading for decoding or
demultiplexing larger words
s Input clamping diodes simplify system design
s Choice of outputs:
Totem-pole (DM74LS155)
Open-collector (DM74LS156)
Ordering Code:
Order Number Package Number
Package Description
DM74LS155M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74LS155N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DM74LS156M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74LS156N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
© 2000 Fairchild Semiconductor Corporation DS006395
www.fairchildsemi.com









No Preview Available !

74LS155 Даташит, Описание, Даташиты
Function Tables
3-Line-to-8-Line Decoder or 1-Line-to-8-Line Demultiplexer
Inputs
Outputs
Select
Strobe
Or Data
(0) (1) (2) (3) (4) (5) (6) (7)
C (Note 1) B A G (Note 2) 2Y0 2Y1 2Y2 2Y3 1Y0 1Y1 1Y2 1Y3
X XX H
HHHHHHHH
L LL L
L HHHHHHH
L LH L
H L HHHHHH
L HL L
HH L HHHHH
L HH L
HHH L HHHH
H LL L
HHHH L HHH
H LH L
HHHHH L HH
H HL
L
HHHHHH L H
H HH L
HHHHHHH L
2-Line-to-4-Line Decoder or 1-Line-to-4-Line Demultiplexer
Select
BA
XX
LL
LH
HL
HH
XX
Inputs
Strobe
G1
H
L
L
L
L
X
Data
C1
X
H
H
H
H
L
Outputs
1Y0 1Y1 1Y2
HHH
LHH
HLH
HH L
HHH
HHH
H = HIGH level
L = LOW level
X = don’t care
Note 1: C = inputs C1 and C2 connected together
Note 2: G = inputs G1 and G2 connected together
1Y3
H
H
H
H
L
H
Select
BA
XX
LL
LH
HL
HH
XX
Inputs
Strobe
G2
H
L
L
L
L
X
Data
C2
X
L
L
L
L
H
Outputs
2Y0 2Y1 2Y2 2Y3
HHHH
L HHH
H L HH
HH L H
HHH L
HHHH
Logic Diagram
www.fairchildsemi.com
2









No Preview Available !

74LS155 Даташит, Описание, Даташиты
Absolute Maximum Ratings(Note 3)
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range
65°C to +150°C
Note 3: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
DM74LS155 Recommended Operating Conditions
Symbol
VCC
VIH
VIL
VOH
IOL
TA
Parameter
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
Min
4.75
2
0
Nom
5
Max
5.25
0.8
0.4
8
70
Units
V
V
V
mA
mA
°C
DM74LS155 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Typ
Min
(Note 4)
VI Input Clamp Voltage
VOH HIGH Level
Output Voltage
VOL LOW Level
Output Voltage
II Input Current @ Max Input Voltage
IIH HIGH Level Input Current
IIL LOW Level Input Current
IOS Short Circuit Output Current
ICC Supply Current
Note 4: All typicals are at VCC = 5V, TA = 25° C.
VCC = Min, II = −18 mA
VCC = Min, IOH = Max
VIL = Max, VIH = Min
VCC = Min, IOL = Max
VIL = Max, VIH = Min
IOL = 4 mA, VCC = Min
VCC = Max, VI = 7V
VCC = Max, VI = 2.7V
VCC = Max, VI = 0.4V
VCC = Max (Note 5)
VCC = Max (Note 6)
2.7 3.4
0.35
0.25
20
6.1
Note 5: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 6: ICC is measured with all outputs OPEN, A,B, and C1 inputs at 4.5V, and C2, G1, and G2 inputs GROUNDED.
Max
1.5
0.5
0.4
0.1
20
0.36
100
10
Units
V
V
V
mA
µA
mA
mA
mA
DM74LS155 Switching Characteristics
at VCC = 5V and TA = 25°C
From (Input)
Symbol
Parameter
To (Output)
tPLH Propagation Delay Time
LOW-to-HIGH Level Output
tPHL Propagation Delay Time
HIGH-to-LOW Level Output
tPLH Propagation Delay Time
LOW-to-HIGH Level Output
tPHL Propagation Delay Time
HIGH-to-LOW Level Output
tPLH Propagation Delay Time
LOW-to-HIGH Level Output
tPHL Propagation Delay Time
HIGH-to-LOW Level Output
A, B, C2, G1
or G2 to Y
A, B, C2, G1
or G2 to Y
A or B
to Y
A or B
to Y
C1
to Y
C1
to Y
RL = 2 k
CL = 15 pF
CL = 50 pF
Min Max Min Max
18 22
27 35
18 24
27 35
20 24
27 35
Units
ns
ns
ns
ns
ns
ns
3 www.fairchildsemi.com










Скачать PDF:

[ 74LS155.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
74LS15TRIPLE 3-INPUT AND GATEMotorola Semiconductors
Motorola Semiconductors
74LS150Data Selectors/MultiplexersFairchild Semiconductor
Fairchild Semiconductor
74LS151LOW POWER SCHOTTKYON Semiconductor
ON Semiconductor
74LS1511-of-8 Line Data Selector/MultiplexerFairchild Semiconductor
Fairchild 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