74LS280 9-bit Odd/Even Parity Generator


The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS280 universal, monolithic, nine-bit parity generators/checkers utilize Schottky-clamped TTL high-performance circuitry and feature odd/even outputs to facilitate the operation of either odd or even parity application

74LS280 Features

  • Generates Either Odd or Even Parity for Nine Data Lines
  • Cascadable for n-bits
  • Useful for Upgrading Existing Systems using MSI Parity Circuits
  • Fast Propagation Speeds
  • Low Power Dissipation

74LS280 Specifications

Supply Voltage4.75 – 5.25Vdc
Maximum Clock Frequency40Mhz
Power Dissipation2mW/gate @100kHz
Minimum Output Current8mA
Propagation Delay10nS
Fan Out (TTL Loads)20

74LS280 Pinout Diagram

74LS280 Pin Description

Pin NoPin NameDescription
1GData Input
2HData Input
3NCNo Connection
4I INInverting Input
5Σ EVENSum For Even Output
6Σ ODDSum For Odd Output
8AData Input
9BData Input
10CData Input
11DData Input
12EData Input
13FData Input
14VCCPositive Supply


  • Digital systems to detect single-bit errors in the transmitted data

74LS280 Alternative Equivalent

Download the 74LS280 9-bit Odd/Even Parity Generator Datasheet from the link given below.