dm74als251 Fairchild Semiconductor, dm74als251 Datasheet

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dm74als251

Manufacturer Part Number
dm74als251
Description
Dm74als251 3-state 1-of-8 Line Data Selector/multiplexer
Manufacturer
Fairchild Semiconductor
Datasheet

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Part Number:
dm74als251N
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Quantity:
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© 2000 Fairchild Semiconductor Corporation
DM74ALS251M
DM74ALS251SJ
DM74ALS251N
DM74ALS251
3-STATE 1-of-8 Line Data Selector/Multiplexer
General Description
This Data Selector/Multiplexer contains full on-chip decod-
ing to select one-of-eight data sources as a result of a
unique three-bit binary code at the Select inputs. Two com-
plementary outputs provide both inverting and non-invert-
ing buffer operation. An Output Control input is provided
which, when at the high level, places both outputs 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.
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
M16D
N16E
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DS006214
Features
Function Table
H
X
Z
D0 thru D7
L
Advanced oxide-isolated, ion-implanted Schottky TTL
process
Switching performance is guaranteed over full tempera-
ture and V
Pin and functional compatible with LS family counterpart
Improved output transient handling capability
Output control circuitry incorporates power-up 3-STATE
feature
Don't Care
High Impedance (OFF)
HIGH Level
LOW 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
CC
X
L
L
L
L
supply range
Inputs
A
X
H
H
H
H
L
L
L
L
Strobe
April 1984
Revised April 2000
S
H
L
L
L
L
L
L
L
L
www.fairchildsemi.com
D
D
D
D
D
D
D
D
Y
Z
0
1
2
3
4
5
6
7
Outputs
D
D
D
D
D
D
D
D
W
Z
0
1
2
3
4
5
6
7

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dm74als251 Summary of contents

Page 1

... Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74ALS251SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74ALS251N 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 Voltage Applied to Disabled Output Operating Free Air Temperature Range Storage Temperature Range Typical JA N Package M Package Recommended Operating Conditions Symbol Parameter V Supply Voltage CC V HIGH Level ...

Page 4

Switching Characteristics over recommended operating free air temperature range 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 Time PHL ...

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 Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide www.fairchildsemi.com Package Number M16D 6 ...

Page 7

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 ...

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