The CD54AC280/3A and CD54ACT280/3A are 9-bit odd/ even parity generator/checkers that utilize the Harris Advanced CMOS Logic technology. Both even and odd parity outputs are available for checking or generating parity words up to nine bits long. Even parity is indicated (E output is HIGH) when an even number of data inputs is HIGH. Odd parity is indicated (O output is HIGH) when an odd number of data inputs is HIGH. Parity checking for words larger than nine bits can be accomplished by tying the E output to any output of an additional AC/ACT280 parity checker.