These universal 9-bit (8 data bits plus 1 parity bit) paritygenerators/checkers feature odd/even outputs and controlinputs to facilitate operation in either odd or even parity applications.Depending on whether even or odd parity is beinggenerated or checked, the even or odd input can beutilized as the parity or 9th-bit input. The word-length capabilityis easily expanded by cascading.Input buffers are provided so that each data input representsonly one normalized series 54/74 load. A full fan-outto 10 normalized series 54/74 loads is available from eachof the outputs at a low logic level. A fan-out to 20 normalizedloads is provided at a high logic level to facilitate theconnection of unused inputs to used inputs.