HD74ACT182

HD74AC182/HD74ACT182 Carry Lookhead Generator Description The HD74AC182/HD74ACT182 is a high-speed carry lookahead generator. It is generally used with the HD74AC181 or HD74AC381 4-bit arithmetic logic unit to provide high-speed lookahead over word lengths of more than four bits. Features Outputs Source/Sink 24 mA HD74ACT182 has TTL-Compatible Inputs Pin Arrangement G1 1 P1 2 G0 3 P0 4 G3 5 P3 6 P 7 GND 8 (Top view) 16 VCC 15 P2 14 G2 13 Cn 12 Cn+X 11 Cn+y 10 G 9 Cn+z HD74AC182/HD74ACT182 Logic Symbol P0 G0 P1 G1 P2 G2 P3 G3 G Cn P Cn+x Cn+y Cn+z Pin Names Cn G0, G2 G1 G3 P 0, P 1 P2 P3 C n + x to Cn + z G P Carry Input Carry Generate Inputs (Active Low) Carry Generate Input (Active Low) Carry Generate Input (Active Low) Carry Propagate Inputs (Active Low) Carry Propagate Input (Active Low) Carry Propagate Input (Active Low) Carry Outputs Carry Generate Output (Active Low) Carry Propagate Output (Active Low) 2 HD74AC182/HD74ACT182 Logic Diagram Cn G0 P0 G1 P1 G2 P2 G3 P3 Cn+x Cn+y Cn+z G P Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Functional Description The HD74AC182/HD74ACT182 carry lookahead generator accepts up to four pairs of Active Low Carry Propagate ( P 0 to P 3) and Carry Generate (G 0 to G 3) signals and an Active High Carry input (Cn) and provides anticipated Active High carries (Cn + x, C n + y , Cn + z ) across four groups of binary adder...