Device identity and active production status
The SN74LS280NS is a 9-bit parity generator/checker from Texas Instruments, packaged in a 14-SO (small-outline) body. It computes odd or even parity on a 9-bit input word and outputs the parity flag.
Housed in a 14-SO package (the SOIC-14 footprint), this device sits on a standard 1.27 mm pitch surface-mount land pattern. The narrow-body SOIC outline is common across many logic families, so the PCB layout is interchangeable with other 14-pin SOIC logic ICs.