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© 2000 Fairchild Semiconductor Corporation DS006203 www.fairchildsemi.com
April 1984
Revised February 2000
DM74ALS151 1 of 8 Line Data Selector/Multiplexer
DM74ALS151
1 of 8 Line Data Selector/Multiplexer
General Description
This Data Selector/Multi plexer contain s full on-chip decoding to select one-of-eight data sources as a result of a
unique three-bit binary code at the Select inputs. Two complementary outputs pro vide both inverting and no n-inverting buffer operation. A Strobe input is provided which,
when at the high level, disable s all data inputs and forces
the Y output to the LOW state and the W output to the
HIGH state. The Select input buffers incorporate internal
overlap features to ensure that select input changes do not
cause invalid output transients.
Features
■ Advanced oxide-isolated, ion-implanted Schottky TTL
process
■ Switching performan ce is gu aranteed over full tempe rature and V
CC
supply range
■ Pin and functional compatible with LS family counterpart
■ Improved output transient handling capability
Ordering Code:
Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.
Connection Diagram Function Table
H = HIGH Level
L = LOW Level
X = Don't Care
D0 thru D7 = the level of the respective D input
Order Number Package Number Package Description
DM74ALS151M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74ALS151N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs Outputs
Select Strobe
YW
CBA S
XXX H L H
LLL L D0D0
L L H L D1 D1
L H L L D2 D2
L H H L D3 D3
H L L L D4 D4
H L H L D5 D5
H H L L D6 D6
HHH L D7 D7
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DM74ALS151
Logic Diagram
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DM74ALS151
Absolute Maximum Ratings(Note 1)
Note 1: The “Absolute Maximum Ratings ” are those val ues beyond w hich
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 “Recommend ed O peratin g Cond itions” t able w ill defin e the condition s
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free-air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C
Typical θ
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 VCC = 4.5V, IIN = −18 mA −1.5 V
V
OH
HIGH Level VCC = 4.5V, IOH = Max 2.4 3.2 V
Output Voltage IOH = −400 µA, VCC = 4.5V to 5.5V VCC − 2V
V
OL
LOW Level Output Voltage VCC = 4.5V IOL = 24 mA 0.35 0.5 V
I
I
Input Current at Maximum
VCC = 5.5V, VIN = 7V 0.1 mA
Input Voltage
I
IH
HIGH Level Input Current VCC = 5.5V, VIN = 2.7V 20 µA
I
IL
LOW Level Input Current VCC = 5.5V, VIN = 0.4V −0.1 mA
I
O
Output Drive Current VCC = 5.5V, V
OUT
= 2.25V −30 −112 mA
I
CC
Supply Current VCC = 5.5V
7.5 12 mA
All Inputs = 4.5V
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DM74ALS151
Switching Characteristics
over recommended operating free air temperature range
Symbol Parameter Conditions From To Min Max Units
t
PLH
Propagation Delay Time VCC = 4.5V to 5.5V
Select Y 4 18 ns
LOW-to-HIGH Level Output CL = 50 pF
t
PHL
Propagation Delay Time RL = 500Ω
Select Y 8 24 ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Select W 7 24 ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Select W 7 23 ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Data Y 3 10 ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Data Y 5 15 ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Data W 3 15 ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Data W 4 15 ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Strobe Y 4 18 ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Strobe Y 4 19 ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Strobe W 5 19 ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Strobe W 5 23 ns
HIGH-to-LOW Level Output
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DM74ALS151
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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DM74ALS151 1 of 8 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 pate nt 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 syste ms
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 inju ry to the
user.
2. A critical component i n any compon ent of a lif e support
device or system whose failu re to perform can be reasonably expected to ca use the fa i lure of the life su pp ort
device or system, or to affect its safety or effectiveness.
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