54F283 Datasheet, National Semiconductor

Y Guaranteed 4000V minimum ESD protection Commercial 74F283PC 74F283SC (Note 1) 74F283SJ (Note 1) Military 54F283DM (Note 2) 54F283FM (Note 2) 54F283LL (Note 2) Packag.

The ’F283 high-speed 4-bit binary full adder with internal carry lookahead accepts two 4-bit binary words (A0
  – A3 B0
  – B3) and a Carry input (C0) It generates the binary Sum outputs (S0
  – S3) and the C.