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DM74LS253 PDF даташит

Спецификация DM74LS253 изготовлена ​​​​«National Semiconductor» и имеет функцию, называемую «TRI-STATE Data Selectors/Multiplexers».

Детали детали

Номер произв DM74LS253
Описание TRI-STATE Data Selectors/Multiplexers
Производители National Semiconductor
логотип National Semiconductor логотип 

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DM74LS253 Даташит, Описание, Даташиты
June 1989
54LS253 DM54LS253 DM74LS253
TRI-STATE Data Selectors Multiplexers
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 provided
for each of the two four-line sections
The TRI-STATE outputs can interface directly with data
lines of bus-organized systems With all but one of the com-
mon 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
Y TRI-STATE version of LS153 with same pinout
Y Schottky-diode-clamped transistors
Y Permit multiplexing from N-lines to one line
Y Performs parallel-to-serial conversion
Y Strobe output control
Y High fanout totem-pole outputs
Y Typical propagation delay
Data to output 12 ns
Select to output 21 ns
Y Typical power dissipation 35 mW
Y Alternate Military Aerospace device (54LS253) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
Function Table
Select
Inputs
Data Inputs
Output Output
Control
B A C0 C1 C2 C3
G
Y
XXXXXX
LL LXXX
L LHXXX
LHXL X X
LH XH X X
HL XX L X
HL XXHX
HHXX X L
HHXX XH
H
L
L
L
L
L
L
L
L
Z
L
H
L
H
L
H
L
H
Address Inputs A and B are common to both sections
H e High Level L e Low Level X e Don’t Care Z e High Impedance (off)
TL F 6416 – 1
Order Number 54LS253DMQB 54LS253FMQB
54LS253LMQB DM54LS253J DM54LS253W
DM74LS253M or DM74LS253N
See NS Package Number E20A J16A
M16A N16E or W16A
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 6416
RRD-B30M105 Printed in U S A









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DM74LS253 Даташит, Описание, Даташиты
Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
DM54LS and 54LS
b55 C to a125 C
DM74LS
0 C to a70 C
Storage Temperature Range
b65 C to a150 C
Note The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed 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
45
2
b55
DM54LS253
Nom
5
Max
55
07
b1
12
125
Min
4 75
2
0
DM74LS253
Nom
Max
5 5 25
08
b2 6
24
70
Units
V
V
V
mA
mA
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI
VOH
Input Clamp Voltage
High Level Output
Voltage
VCC e Min II e b18 mA
VCC e Min IOH e Max
VIL e Max VIH e Min
DM54
DM74
24
24
VOL Low Level Output
Voltage
VCC e Min IOL e Max
VIL e Max VIH e Min
DM54
DM74
IOL e 12 mA VCC e Min
DM74
II
Input Current Max
VCC e Max VI e 7V
Input Voltage
IIH
IIL
IOZH
High Level Input Current
Low Level Input Current
Off-State Output Current
with High Level Output
Voltage Applied
VCC e Max VI e 2 7V
VCC e Max VI e 0 4V
VCC e Max VO e 2 7V
VIH e Min VIL e Max
IOZL
Off-State Output Current
with Low Level Output
Voltage Applied
VCC e Max VO e 0 4
VIH e Min VIL e Max
IOS Short Circuit
Output Current
VCC e Max
(Note 2)
DM54
DM74
b20
b20
ICC1
Supply Current
VCC e Max (Note 3)
ICC2
Supply Current
VCC e Max (Note 4)
Note 1 All typicals are at VCC e 5V TA e 25 C
Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second
Note 3 ICC1 is measured with all outputs open and all the inputs grounded
Note 4 ICC2 is measured with the outputs open OUTPUT CONTROL at 4 5V and all other inputs grounded
Typ
(Note 1)
34
31
7
85
Max
b1 5
04
05
04
01
20
b0 4
20
b20
b100
b100
12
14
Units
V
V
V
mA
mA
mA
mA
mA
mA
mA
mA
2









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DM74LS253 Даташит, Описание, Даташиты
Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
From (Input)
To (Output)
RL e 667X
CL e 45 pF
CL e 150 pF
Min Max Min Max
Units
tPLH
Propagation Delay Time
Low to High Level Output
Data
to Y
25 35 ns
tPHL
Propagation Delay Time
High to Low Level Output
Data
to Y
20 30 ns
tPLH
Propagation Delay Time
Low to High Level Output
Select
to Y
45 54 ns
tPHL
Propagation Delay Time
High to Low Level Output
Select
to Y
32 44 ns
tPZH
Output Enable Time
to High Level Output
Output
Control to Y
18
32 ns
tPZL Output Enable Time
to Low Level Output
Output
Control to Y
23
35 ns
tPHZ
Output Disable Time
from High Level Output (Note 1)
Output
Control to Y
41
ns
tPLZ Output Disable Time
from Low Level Output (Note 1)
Note 1 CL e 5 pF
Output
Control to Y
27
ns
Logic Diagram
TL F 6416 – 2
3










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