DM74S280N Fairchild Semiconductor, DM74S280N Datasheet

DM74S280N

Manufacturer Part Number

DM74S280N

Description

IC GENERATOR/CHECKER 9BIT 14-DIP

Manufacturer

Fairchild Semiconductor

Series

74Sr

Datasheet

1.DM74S280N.pdf (5 pages)

Specifications of DM74S280N

Logic Type

Parity Generator/Checker

Number Of Circuits

Current - Output High, Low

1mA, 20mA

Voltage - Supply

4.75 V ~ 5.25 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Through Hole

Package / Case

14-DIP (0.300", 7.62mm)

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

74S280
74S280N

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

DM74S280N

Manufacturer:

National

Quantity:

3 707

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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

www.fairchildsemi.com

Outputs

Odd

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DM74S280N Summary of contents

Page 1

... Package Number DM74S280M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow DM74S280N N14A 14-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 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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