FAIRCHILD DM74ALS253

Revised February 2000
DM74ALS253
3-STATE Dual 1-of-4 Line Data Selector/Multiplexer
General Description
Features
This Data Selector/Multiplexer contains full on-chip decoding 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 separate Data and Output Control inputs and a non-inverting 3STATE 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 conflicts, 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.
■ Advanced oxide-isolated, ion-implanted Schottky TTL
process
■ Switching performance is guaranteed over full temperature and VCC supply range
■ Pin and functional compatible with LS family counterpart
■ Improved output transient handling capability
■ Output control circuitry incorporates power-up 3-STATE
feature
Ordering Code:
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
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
Output
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
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 3-STATE Dual 1-of-4 Line Data Selector/Multiplexer
April 1984
DM74ALS253
Logic Diagram
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2
Supply Voltage, VCC
7V
Input Voltage
7V
Voltage Applied to Disabled Output
5.5V
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.
0°C to +70°C
Operating Free Air Temperature Range
−65°C to +150°C
Storage Temperature Range
Typical θJA
N Package
78.0°C/W
M Package
107.0°C/W
Recommended Operating Conditions
Symbol
Parameter
Min
Nom
Max
Units
4.5
5
5.5
V
LOW Level Input Voltage
0.8
V
IOH
HIGH Level Output Current
−2.6
mA
IOL
LOW Level Output Current
24
mA
TA
Free Air Operating Temperature
70
°C
VCC
Supply Voltage
VIH
HIGH Level Input Voltage
VIL
2
V
0
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Symbol
Parameter
Conditions
Min
VIK
Input Clamp Voltage
VCC = 4.5V, IIN = −18 mA
VOH
HIGH Level
VCC = 4.5V, IOH = Max
Output Voltage
IOH = 400 µA, VCC = 4.5V to 5.5V
LOW Level
VCC = 4.5V
VOL
Output Voltage
2.4
Typ
Max
Units
−1.5
V
3.2
V
VCC − 2
IOL = 12 mA
0.25
0.4
IOL = 24 mA
0.35
0.5
V
II
Input Current at Maximum input Voltage VCC = 5.5V, VIN = 7V
IIH
HIGH Level Input Current
VCC = 5.5V, VIN = 2.7V
20
µA
IIL
LOW Level Input Current
VCC = 5.5V, VIN = 0.4V
−0.1
mA
IO
Output Drive Current
VCC = 5.5V, VOUT = 2.25V
−112
mA
IOZH
OFF-State Output Current, HIGH Bias
VCC = 5.5V, VOUT = 2.7V
20
µA
IOZL
OFF-State Output Current, LOW Bias
VCC = 5.5V, VOUT = 0.4V
−20
µA
ICC
Supply Current
VCC = 5.5V
0.1
−30
Output HIGH
6.5
mA
12
Output LOW
6.5
12
Output Disabled
7.5
14
mA
Min
Max
Units
Select to Y
5
21
ns
Select to Y
5
21
ns
Data to Y
2
10
ns
Data to Y
3
14
ns
Switching Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
From (Input)
Symbol
Parameter
Conditions
To (Output)
tPLH
tPHL
Propagation Delay Time
VCC = 4.5V to 5.5V
LOW-to-HIGH Level Output
CL = 50 pF
Propagation Delay Time
RL = 500Ω
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
tPZH
Output Enable Time to HIGH Level Output
Output Control to Y
3
14
ns
tPZL
Output Enable Time to LOW Level Output
Output Control to Y
4
16
ns
tPHZ
Output Disable Time from HIGH Level Output
Output Control to Y
2
10
ns
tPLZ
Output Disable Time from LOW Level Output
Output Control to Y
2
14
ns
3
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DM74ALS253
Absolute Maximum Ratings(Note 1)
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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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:
2. A critical component in 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.
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 reasonably expected to result in a significant injury to the
user.
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