© 2000 Fairchild Semiconductor Corporation
DS006215
www.fairchildsemi.com
April 1984
Revised February 2000
DM74ALS253 3-
ST
A
T
E D
u
al 1-of
-4 Li
ne
Dat
a
Se
lect
or/
M
u
l
t
i
pl
exer
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:
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Connection Diagram
Function Table
Address inputs A and B are common to both sections
H
=
HIGH Level
L
=
LOW Level
X
=
Don't Care
Z
=
High Impedance
Order Number
Package Number
Package Description
DM74ALS253M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74ALS253N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Select
Data Inputs
Output
Output
Inputs
Control
B
A
C0
C1
C2
C3
G
Y
X
X
X
X
X
X
H
Z
L
L
L
X
X
X
L
L
L
L
H
X
X
X
L
H
L
H
X
L
X
X
L
L
L
H
X
H
X
X
L
H
H
L
X
X
L
X
L
L
H
L
X
X
H
X
L
H
H
H
X
X
X
L
L
L
H
H
X
X
X
H
L
H
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2
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74ALS253
Logic Diagram
3
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DM74ALS253
Absolute Maximum Ratings
(Note 1)
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
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at V
CC
=
5V, T
A
=
25
°
C.
Switching Characteristics
over recommended operating free air temperature range. All typical values are measured at V
CC
=
5V, T
A
=
25
°
C.
Supply Voltage, V
CC
7V
Input Voltage
7V
Voltage Applied to Disabled Output
5.5V
Operating Free Air Temperature Range
0
°
C to
+
70
°
C
Storage Temperature Range
-
65
°
C to
+
150
°
C
Typical
JA
N Package
78.0
°
C/W
M Package
107.0
°
C/W
Symbol
Parameter
Min
Nom
Max
Units
V
CC
Supply Voltage
4.5
5
5.5
V
V
IH
HIGH Level Input Voltage
2
V
V
IL
LOW Level Input Voltage
0.8
V
I
OH
HIGH Level Output Current
-
2.6
mA
I
OL
LOW Level Output Current
24
mA
T
A
Free Air Operating Temperature
0
70
°
C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
IK
Input Clamp Voltage
V
CC
=
4.5V, I
IN
=
-
18 mA
-
1.5
V
V
OH
HIGH Level
V
CC
=
4.5V, I
OH
=
Max
2.4
3.2
V
Output Voltage
I
OH
=
400
µ
A, V
CC
=
4.5V to 5.5V
V
CC
-
2
V
OL
LOW
Level V
CC
=
4.5V
I
OL
=
12 mA
0.25
0.4
V
Output Voltage
I
OL
=
24 mA
0.35
0.5
I
I
Input Current at Maximum input Voltage V
CC
=
5.5V, V
IN
=
7V
0.1
mA
I
IH
HIGH Level Input Current
V
CC
=
5.5V, V
IN
=
2.7V
20
µ
A
I
IL
LOW Level Input Current
V
CC
=
5.5V, V
IN
=
0.4V
-
0.1
mA
I
O
Output Drive Current
V
CC
=
5.5V, V
OUT
=
2.25V
-
30
-
112
mA
I
OZH
OFF-State Output Current, HIGH Bias
V
CC
=
5.5V, V
OUT
=
2.7V
20
µ
A
I
OZL
OFF-State Output Current, LOW Bias
V
CC
=
5.5V, V
OUT
=
0.4V
-
20
µ
A
I
CC
Supply Current
V
CC
=
5.5V
Output HIGH
6.5
12
Output LOW
6.5
12
mA
Output Disabled
7.5
14
Symbol
Parameter
Conditions
From (Input)
Min
Max
Units
To (Output)
t
PLH
Propagation Delay Time
V
CC
=
4.5V to 5.5V
Select to Y
5
21
ns
LOW-to-HIGH Level Output
C
L
=
50 pF
t
PHL
Propagation Delay Time
R
L
=
500
Select to Y
5
21
ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Data to Y
2
10
ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Data to Y
3
14
ns
HIGH-to-LOW Level Output
t
PZH
Output Enable Time to HIGH Level Output
Output Control to Y
3
14
ns
t
PZL
Output Enable Time to LOW Level Output
Output Control to Y
4
16
ns
t
PHZ
Output Disable Time from HIGH Level Output
Output Control to Y
2
10
ns
t
PLZ
Output Disable Time from LOW Level Output
Output Control to Y
2
14
ns
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74ALS253
Physical Dimensions
inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
Package Number M16A
5
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DM74ALS253 3-
ST
A
T
E D
u
al 1-of
-4 Li
ne
Dat
a
Se
lect
or/
M
u
l
t
i
pl
exer
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.
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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