DM74LS251N Fairchild Semiconductor, DM74LS251N Datasheet

no-image

DM74LS251N

Manufacturer Part Number
DM74LS251N
Description
IC SELECTOR/MUX 1/8 3ST 16-DIP
Manufacturer
Fairchild Semiconductor
Series
74LSr
Type
Data Selector/Multiplexerr
Datasheet

Specifications of DM74LS251N

Circuit
1 x 8:1
Independent Circuits
1
Current - Output High, Low
2.6mA, 24mA
Voltage Supply Source
Single Supply
Voltage - Supply
4.75 V ~ 5.25 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
16-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
74LS251
74LS251N
© 2000 Fairchild Semiconductor Corporation
DM74LS251M
DM74LS251N
DM74LS251
3-STATE 1-of-8 Line Data Selector/Multiplexer
General Description
These data selectors/multiplexers contain full on-chip
binary decoding to select one-of-eight data sources, and
feature a strobe-controlled 3-STATE output. The strobe
must be at a low logic level to enable these devices. The 3-
STATE outputs permit direct connection to a common bus.
When the strobe input is HIGH, both outputs are in a high-
impedance state in which both the upper and lower transis-
tors of each totem-pole output are OFF, and the output nei-
ther drives nor loads the bus significantly. When the strobe
is LOW, the outputs are activated and operate as standard
TTL totem-pole outputs.
To minimize the possibility that two outputs will attempt to
take a common bus to opposite logic levels, the output con-
trol circuitry is designed so that the average output disable
time is shorter than the average output enable time.
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Order Number
Package Number
M16A
N16E
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
DS006415
Features
Function Table
H
L
X
Z
D0, D1…D7
3-STATE version of DM74LS151
Interface directly with system bus
Perform parallel-to-serial conversion
Permit multiplexing from N-lines to one line
Complementary outputs provide true and inverted data
Maximum number of common outputs: 129
Typical propagation delay time (D to Y): 17 ns
Typical power dissipation: 35 mW
LOW Logic Level
Don't Care
High Impedance (OFF)
HIGH Logic Level
C
X
H
H
H
H
L
L
L
L
Package Description
Select
The level of the respective D input
B
H
H
H
H
X
L
L
L
L
Inputs
A
X
H
H
H
H
L
L
L
L
Strobe
August 1986
Revised March 2000
S
H
L
L
L
L
L
L
L
L
www.fairchildsemi.com
D0
D1
D2
D3
D4
D5
D6
D7
Y
Z
Outputs
D0
D1
D2
D3
D4
D5
D6
D7
W
Z

Related parts for DM74LS251N

DM74LS251N Summary of contents

Page 1

... Package Number DM74LS251M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74LS251N 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. ...

Page 2

Logic Diagram www.fairchildsemi.com 2 ...

Page 3

Absolute Maximum Ratings Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range Recommended Operating Conditions Symbol Parameter V Supply Voltage CC V HIGH Level Input Voltage IH V LOW Level Input Voltage IL I HIGH Level Output ...

Page 4

Switching Characteristics and Symbol Parameter t Propagation Delay Time PLH LOW-to-HIGH Level Output t Propagation Delay Time PHL HIGH-to-LOW Level Output t Propagation Delay Time PLH LOW-to-HIGH Level Output t Propagation Delay ...

Page 5

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M16A 5 www.fairchildsemi.com ...

Page 6

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right ...

Related keywords