BUY 74F280 https://www.utsource.net/itm/p/1248656.html
9-bit odd/even parity generator/checker
The 74F280 is a 14-pin DIP (dual in-line package) integrated circuit (IC) manufactured by National Semiconductor. It is a 4-bit magnitude comparator, which is used to compare two 4-bit binary or BCD (Binary Coded Decimal) words. The output of the comparator is a single bit logic signal indicating whether the two words are equal, greater than or less than each other. Features: * 4-bit magnitude comparator * Compares two 4-bit binary or BCD words * Output is a single bit logic signal * Low power consumption Applications: * Digital signal processing * Data comparison * Arithmetic operations * Timing and control circuits * Automotive and industrial control systems (For reference only)