Details, datasheet, quote on part number: SN74ALS280
CategoryLogic => Parity Generators/Checkers => Bipolar->ALS Family
TitleBipolar->ALS Family
Description9-bit Odd/even Parity Generator/checker
CompanyTexas Instruments, Inc.
DatasheetDownload SN74ALS280 datasheet
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Features, Applications

Generate Either Odd or Even Parity for Nine Data Lines Cascadable for n-Bit Parity Can Be Used to Upgrade Existing Systems Using MSI Parity Circuits Package Options Include Plastic Small-Outline (D) Packages and Standard Plastic (N) 300-mil DIPs


No internal connection These universal 9-bit parity generators/checkers utilize advanced Schottky high-performance circuitry and feature odd ( ODD) and even ( EVEN) outputs to facilitate operation of either odd- or even-parity applications. The word-length capability is easily expanded by cascading.

These devices can be used to upgrade the performance of most systems utilizing the SN74ALS180 and SN74AS180 parity generators/checkers. Although the SN74ALS280 and SN74AS280 are implemented without expander inputs, the corresponding function is provided by the availability of an input (I) at terminal 4 and the absence of any internal connection at terminal 3. This permits the SN74ALS280 and to be substituted for the SN74ALS180 and SN74AS180 in existing designs to produce an identical function even if the devices are mixed with existing SN74ALS180 and SN74AS180 devices. All SN74AS280 inputs are buffered to lower the drive requirements. The SN74ALS280 and SN74AS280 are characterized for operation from to 70C.

This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage, VCC. 7 V Input voltage, VI. 7 V Operating free-air temperature range, TA: to 70C Storage temperature range. to 150C

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

SN74ALS280 MIN VCC VIH VIL IOH IOL TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Operating free-air temperature NOM 5 MAX 5.5 UNIT mA C

electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)

ICC VCC 16 mA All typical values are at VCC = 25C. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.


For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.


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