DM74ALS253 3-STATE Dual 1-of-4 Line Data Selector/Multiplexer
April 1984
Revised February 2000
DM74ALS253
3-STATE Dual 1-of-4 Line Data Selector/Multiplexer
General Description
This Data Selector/Multiplexer contains full on-chip decod-
ing to select one-of-four data sources as a result of a
unique two-bit binary code at the Select Inputs. Each of the
two Data Selector/Multiplexer circuits have their own sepa-
rate Data and Output Control inputs and a non-inverting 3-
STATE output buffer. The Output Control inputs, when at
the high level, place the corresponding output in the high
impedance OFF-State. In order to prevent bus access con-
flicts, output disable times are shorter than output enable
times. The Select input buffers incorporate internal overlap
features to ensure that select input changes do not cause
invalid output transients.
Features
s
Advanced oxide-isolated, ion-implanted Schottky TTL
process
s
Switching performance is guaranteed over full tempera-
ture and V
CC
supply range
s
Pin and functional compatible with LS family counterpart
s
Improved output transient handling capability
s
Output control circuitry incorporates power-up 3-STATE
feature
Ordering Code:
Order Number
DM74ALS253M
DM74ALS253N
Package Number
M16A
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
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
Inputs
B
X
L
L
L
L
H
H
H
H
A
X
L
L
H
H
L
L
H
H
C0
X
L
H
X
X
X
X
X
X
C1
X
X
X
L
H
X
X
X
X
C2
X
X
X
X
X
L
H
X
X
C3
X
X
X
X
X
X
X
L
H
Data Inputs
Output
Control
G
H
L
L
L
L
L
L
L
L
Y
Z
L
H
L
H
L
H
L
H
Output
Address inputs A and B are common to both sections
H
=
HIGH Level
L
=
LOW Level
X
=
Don't Care
Z
=
High Impedance
© 2000 Fairchild Semiconductor Corporation
DS006215
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DM74ALS253
Logic Diagram
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2
DM74ALS253
Absolute Maximum Ratings
(Note 1)
Supply Voltage, V
CC
Input Voltage
Voltage Applied to Disabled Output
Operating Free Air Temperature Range
Storage Temperature Range
Typical
θ
JA
N Package
M Package
78.0°C/W
107.0°C/W
7V
7V
5.5V
0°C to
+70°C
−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 tables 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
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
0
Parameter
Min
4.5
2
0.8
−2.6
24
70
Nom
5
Max
5.5
Units
V
V
V
mA
mA
°C
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at V
CC
=
5V, T
A
=
25°C.
Symbol
V
IK
V
OH
V
OL
I
I
I
IH
I
IL
I
O
I
OZH
I
OZL
I
CC
Parameter
Input Clamp Voltage
HIGH Level
Output Voltage
LOW Level
Output Voltage
Input Current at Maximum input Voltage V
CC
=
5.5V, V
IN
=
7V
HIGH Level Input Current
LOW Level Input Current
Output Drive Current
OFF-State Output Current, HIGH Bias
OFF-State Output Current, LOW Bias
Supply Current
V
CC
=
5.5V, V
IN
=
2.7V
V
CC
=
5.5V, V
IN
=
0.4V
V
CC
=
5.5V, V
OUT
=
2.25V
V
CC
=
5.5V, V
OUT
=
2.7V
V
CC
=
5.5V, V
OUT
=
0.4V
V
CC
=
5.5V
Output HIGH
Output LOW
Output Disabled
6.5
6.5
7.5
−30
Conditions
V
CC
=
4.5V, I
IN
= −18
mA
V
CC
=
4.5V, I
OH
=
Max
I
OH
=
400
µA,
V
CC
=
4.5V to 5.5V
V
CC
=
4.5V
I
OL
=
12 mA
I
OL
=
24 mA
2.4
V
CC
−
2
0.25
0.35
0.4
0.5
0.1
20
−0.1
−112
20
−20
12
12
14
mA
3.2
Min
Typ
Max
−1.5
Units
V
V
V
mA
µA
mA
mA
µA
µA
Switching Characteristics
over recommended operating free air temperature range. All typical values are measured at V
CC
=
5V, T
A
=
25°C.
From (Input)
Symbol
Parameter
Conditions
To (Output)
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Output Enable Time to HIGH Level Output
Output Enable Time to LOW Level Output
Output Disable Time from HIGH Level Output
Output Disable Time from LOW Level Output
V
CC
=
4.5V to 5.5V
C
L
=
50 pF
R
L
=
500Ω
Select to Y
Select to Y
Data to Y
Data to Y
Output Control to Y
Output Control to Y
Output Control to Y
Output Control to Y
Min
5
5
2
3
3
4
2
2
Max
21
21
10
14
14
16
10
14
Units
ns
ns
ns
ns
ns
ns
ns
ns
3
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DM74ALS253
Physical Dimensions
inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
Package Number M16A
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4
DM74ALS253 3-STATE Dual 1-of-4 Line Data Selector/Multiplexer
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N16E
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’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 FAIRCHILD
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 (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
5
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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