CD54HC283, CD74HC283, CD54HCT283, CD74HCT283 SCHS1.
Texas Instruments
CD74HCT283 - 4-Bit Binary Full Adder
CD54HC283, CD74HC283, CD54HCT283, CD74HCT283 SCHS176E – NOVEMBER 1997 – REVISED JULY 2022 High-Speed CMOS Logic 4-Bit Binary Full Adder with Fast Carr.