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74LS253 PDF даташит

Спецификация 74LS253 изготовлена ​​​​«Fairchild Semiconductor» и имеет функцию, называемую «3-STATE Data Selector/Multiplexer».

Детали детали

Номер произв 74LS253
Описание 3-STATE Data Selector/Multiplexer
Производители Fairchild Semiconductor
логотип Fairchild Semiconductor логотип 

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74LS253 Даташит, Описание, Даташиты
August 1986
Revised March 2000
DM74LS253
3-STATE Data Selector/Multiplexer
General Description
Each of these Schottky-clamped data selectors/multiplex-
ers contains inverters and drivers to supply fully comple-
mentary, on-chip, binary decoding data selection to the
AND-OR gates. Separate output control inputs are pro-
vided for each of the two four-line sections.
The 3-STATE outputs can interface directly with data lines
of bus-organized systems. With all but one of the common
outputs disabled (at a high impedance state), the low
impedance of the single enabled output will drive the bus
line to a HIGH or LOW logic level.
Features
s 3-STATE version of DM74LS153 with same pinout
s Schottky-diode-clamped transistors
s Permit multiplexing from N-lines to one line
s Performs parallel-to-serial conversion
s Strobe/output control
s High fanout totem-pole outputs
s Typical propagation delay
Data to output 12 ns
Select to output 21 ns
s Typical power dissipation 35 mW
Ordering Code:
Order Number Package Number
Package Description
DM74LS253M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74LS253N
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
Function Table
Select
Data Inputs
Output
Inputs
Control
B A C0 C1 C2 C3 G
X X X X XX
H
L L L X XX
L
L L H X XX
L
L H X L XX
L
L H X H XX
L
H L X X LX
L
H L X X HX
L
H H X X XL
L
H H X X XH
L
Address Inputs A and B are common to both sections.
H = HIGH Level
L = LOW Level
X = Don't Care
Z = High Impedance (OFF)
Output
Y
Z
L
H
L
H
L
H
L
H
© 2000 Fairchild Semiconductor Corporation DS006416
www.fairchildsemi.com









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74LS253 Даташит, Описание, Даташиты
Logic Diagram
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74LS253 Даташит, Описание, Даташиты
Absolute Maximum Ratings(Note 1)
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 1: 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” table are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Symbol
VCC
VIH
VIL
IOH
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
Nom
5
0
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI Input Clamp Voltage
VCC = Min, II = −18 mA
VOH HIGH Level
Output Voltage
VCC = Min, IOH = Max
VIL = Max, VIH = Min
2.4
VOL LOW Level
VCC = Min, IOL = Max
Output Voltage
VIL = Max, VIH = Min
IOL = 12 mA, VCC = Min
II
Input Current @ Max Input Voltage
VCC = Max, VI = 7V
IIH HIGH Level Input Current
VCC = Max, VI = 2.7V
IIL LOW Level Input Current
VCC = Max, VI = 0.4V
IOZH
Off-State Output Current with
VCC = Max, VO = 2.7V
HIGH Level Output Voltage Applied
VIH = Min, VIL = Max
IOZL Off-State Output Current with
VCC = Max, VO = 0.4
LOW Level Output Voltage Applied
VIH = Min, VIL = Max
IOS Short Circuit Output Current
VCC = Max (Note 3)
20
ICC1 Supply Current
VCC = Max (Note 4)
ICC2 Supply Current
VCC = Max (Note 5)
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: ICC1 is measured with all outputs OPEN, and all the inputs grounded.
Note 5: ICC2 is measured with the outputs OPEN, OUTPUT CONTROL at 4.5V and all other inputs grounded.
Max
Units
5.25
V
V
0.8 V
2.6
mA
24 mA
70 °C
Typ
(Note 2)
3.1
7
8.5
Max
1.5
0.5
0.4
0.1
20
0.4
20
20
100
12
14
Units
V
V
V
mA
µA
mA
µA
µA
mA
mA
mA
3 www.fairchildsemi.com










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