HD74HC182 Look-Ahead Carry Generator REJ03D0586-0300 Rev.
3.
00 Jan 31, 2006 Description The HD74HC182 is a high-speed Carry Lockahead Generator.
It is used with the HD74HC181 4-Bit Arithmetic Logic Unit to provide high-speed lockahead over World lengths of more than four bits.
The device accepts up to four pairs of active-low Carry Propagate (P0, P1, P2, P3) and Carry Generate (G0, G1, G2, G3) signals and an active-high carries (Cn+x, Cn+y, Cn+z) across four groups of binary adders.
The HD74HC182 also has active-low Carry Propagate (P) and Carry Generate (G) outputs which may be used for further levels of lockahead.
The logic equations provided at the outputs are: Cn+x = Y0 (X0 + Cn) Cn+y = ...

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