DM54LS253W [NSC]
TRI-STATE Data Selectors/Multiplexers; 三态数据选择器/多路复用器
| 型号： | DM54LS253W |
| 厂家： | 
National Semiconductor |
| 描述： | TRI-STATE Data Selectors/Multiplexers |
| 文件： | 总6页 (文件大小：152K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
June 1989
54LS253/DM54LS253/DM74LS253
TRI-STATE Data Selectors/Multiplexers
É
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.
Features
Y
TRI-STATE version of LS153 with same pinout
Schottky-diode-clamped transistors
Permit multiplexing from N-lines to one line
Performs parallel-to-serial conversion
Strobe/output control
Y
Y
Y
Y
Y
Y
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.
High fanout totem-pole outputs
Typical propagation delay
Data to output 12 ns
Select to output 21 ns
Y
Y
Typical power dissipation 35 mW
Alternate Military/Aerospace device (54LS253) is avail-
able. Contact a National Semiconductor Sales Office/
Distributor for specifications.
Connection Diagram
Function Table
Dual-In-Line Package
Select
Output
Control
Data Inputs
Output
Y
Inputs
B
A
C0
C1
C2
C3
G
X
L
X
L
X
L
X
X
X
L
X
X
X
X
X
L
X
X
X
X
X
X
X
L
H
L
L
L
L
L
L
L
L
Z
L
L
L
H
X
X
X
X
X
X
H
L
L
H
H
L
L
H
X
X
X
X
H
L
H
H
H
H
L
H
X
X
H
L
H
H
H
H
Address Inputs A and B are common to both sections.
e
e
e
e
Don’t Care, Z High Impedance (off).
H
High Level, L
Low Level, X
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-STATEÉ is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
TL/F/6416
RRD-B30M105/Printed in U. S. A.
Absolute Maximum Ratings (Note)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
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.
Supply Voltage
Input Voltage
7V
7V
Operating Free Air Temperature Range
DM54LS and 54LS
DM74LS
b
b
a
a
55 C to 125 C
§
§
0 C to 70 C
§
§
a
65 C to 150 C
Storage Temperature Range
§
§
Recommended Operating Conditions
DM54LS253
DM74LS253
Symbol
Parameter
Units
Min
4.5
2
Nom
Max
Min
4.75
2
Nom
Max
V
V
V
Supply Voltage
5
5.5
5
5.25
V
V
CC
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
IH
0.7
0.8
V
IL
b
b
I
I
1
2.6
24
70
mA
mA
OH
OL
12
b
T
A
55
125
0
C
§
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Typ
Symbol
Parameter
Conditions
Min
Max
Units
(Note 1)
e
e
e b
e
b
1.5
V
V
Input Clamp Voltage
V
Min, I
Min, I
18 mA
V
V
I
CC
I
High Level Output
Voltage
V
V
Max
Min
DM54
DM74
DM54
DM74
DM74
2.4
2.4
3.4
3.1
OH
CC
OH
e
e
Max, V
IL
IH
e
e
e
V
OL
Low Level Output
Voltage
V
V
Min, I
Max
Min
0.4
CC
OL
e
Max, V
IH
IL
0.5
0.4
V
e
e
I
12 mA, V
Min
OL
CC
@
Input Current Max
e
e
I
V
Max, V
7V
I
CC
I
0.1
20
mA
Input Voltage
e
e
e
e
e
I
I
I
High Level Input Current
Low Level Input Current
V
V
Max, V
Max, V
Max, V
2.7V
0.4V
mA
IH
CC
I
b
0.4
mA
IL
CC
I
e
Off-State Output Current
with High Level Output
Voltage Applied
V
V
2.7V
OZH
CC
O
e
e
Min, V
IL
Max
20
mA
IH
e
Max, V
e
I
I
Off-State Output Current
with Low Level Output
Voltage Applied
V
V
0.4
OZL
OS
CC
O
e
e
b
20
Min, V
Max
mA
IH
IL
e
(Note 2)
b
b
b
Short Circuit
V
CC
Max
DM54
DM74
20
20
100
100
mA
Output Current
b
e
e
I
I
Supply Current
Supply Current
V
V
Max (Note 3)
Max (Note 4)
7
12
14
mA
mA
CC1
CC2
CC
8.5
CC
e
e
25 C.
Note 1: All typicals are at V
5V, T
§
Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
CC
A
Note 3: I
Note 4: I
is measured with all outputs open, and all the inputs grounded.
CC1
is measured with the outputs open, OUTPUT CONTROL at 4.5V and all other inputs grounded.
CC2
2
e
e
25 C (See Section 1 for Test Waveforms and Output Load)
Switching Characteristics at V
5V and T
§
CC
A
e
R
L
667X
From (Input)
To (Output)
e
e
L
Symbol
Parameter
C
L
45 pF
C
150 pF
Max
Units
Min
Max
Min
t
t
t
t
t
t
t
t
Propagation Delay Time
Low to High Level Output
Data
to Y
PLH
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
25
35
30
54
44
32
35
ns
ns
ns
ns
ns
ns
ns
ns
Propagation Delay Time
High to Low Level Output
Data
to Y
20
45
32
18
23
41
27
Propagation Delay Time
Low to High Level Output
Select
to Y
Propagation Delay Time
High to Low Level Output
Select
to Y
Output Enable Time
to High Level Output
Output
Control to Y
Output Enable Time
to Low Level Output
Output
Control to Y
Output Disable Time
Output
from High Level Output (Note 1)
Control to Y
Output Disable Time
Output
from Low Level Output (Note 1)
Control to Y
e
Note 1: C
5 pF.
L
Logic Diagram
TL/F/6416–2
3
Physical Dimensions inches (millimeters)
Ceramic Leadless Chip Carrier Package (E)
Order Number 54LS253LMQB
NS Package Number E20A
16-Lead Ceramic Dual-In-Line Package (J)
Order Number 54LS253DMQB or DM54LS253J
NS Package Number J16A
4
Physical Dimensions inches (millimeters) (Continued)
16-Lead Small Outline Molded Package (M)
Order Number DM74LS253M
NS Package Number M16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS253N
NS Package Number N16E
5
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flat Package (W)
Order Number 54LS253FMQB or DM54LS253W
NS Package Number W16A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and whose
failure to perform, when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
2. A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
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Corporation
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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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