DM74S280M_NL Fairchild Semiconductor, DM74S280M_NL Datasheet

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DM74S280M_NL

Manufacturer Part Number
DM74S280M_NL
Description
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of DM74S280M_NL

Logical Function
Parity Gen/Checker
Logic Family
S
Number Of Elements
1
Number Of Bits
9
Propagation Delay Time
24ns
High Level Output Current
-1mA
Low Level Output Current
20mA
Operating Supply Voltage (typ)
5V
Package Type
SOIC N
Operating Temp Range
0C to 70C
Operating Supply Voltage (min)
4.75V
Operating Supply Voltage (max)
5.25V
Pin Count
14
Mounting
Surface Mount
Operating Temperature Classification
Commercial
Technology
Bipolar
Lead Free Status / RoHS Status
Compliant
© 2000 Fairchild Semiconductor Corporation
DM74S280M
DM74S280N
DM74S280
9-Bit Parity Generator/Checker
General Description
These universal, nine-bit parity generators/checkers utilize
Schottky-clamped TTL high-performance circuitry, and fea-
ture odd/even outputs to facilitate operation of either odd or
even parity applications. The word-length capability is eas-
ily expanded by cascading.
The DM74S280 can be used to upgrade the performance
of most systems utilizing the DM74180 parity generator/
checker. Although the DM74S280 is implemented without
expander inputs, the corresponding function is provided by
the availability of all input at pin 4, and no internal connec-
tion at pin 3. This permits the DM74S280 to be substituted
for the 180 in existing designs to produce an identical func-
tion, even if DM74S280’s are mixed with existing 180’s.
Input buffers are provided so that each input represents
only one normal 74S load, and full fan-out to 10 normal
Series 74S loads is available from each of the outputs at
low logic levels. A fan-out to 20 normal Series 74S loads is
provided at high logic levels, to facilitate connection of
unused inputs to used inputs.
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
M14A
N14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DS006483
Features
Function Table
Generates either odd or even parity for nine data lines
Cascadable for N-bits
Can be used to upgrade existing systems using MSI par-
ity circuits
Typical data-to-output delay—14 ns
(A Thru I) that are HIGH
Package Description
Number of Inputs
0, 2, 4, 6, 8
1, 3, 5, 7, 9
August 1986
Revised May 2000
Even
H
L
www.fairchildsemi.com
Outputs
Odd
H
L

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DM74S280M_NL Summary of contents

Page 1

... 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 © 2000 Fairchild Semiconductor Corporation Features Generates either odd or even parity for nine data lines ...

Page 2

Logic Diagram Typical Applications Three DM74S280’s can be used to implement a 25-line parity generator/checker. This arrangement will provide parity in typically 25 ns. (See Figure 1.) FIGURE 1. 25-Line Parity/Generator Checker www.fairchildsemi.com Longer word lengths can be implemented by ...

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

Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow www.fairchildsemi.com Package Number M14A 4 ...

Page 5

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-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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