Programming instructions

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Multisim Component Reference Guide 6-32 ni.com
6.4.61 74xx182 (Look-ahead Carry GEN)
The high-speed, look-ahead carry generator can anticipate a carry across four binary adders or
groups of adders. It is cascadable to perform full look-ahead across n-bit adders.
Truth table for G
output:
INPUTS OUTPUT
G
3G2G1G0P3P2P1G
0XXXXXX0
X0XX0XX0
XX0X00X0
XXX00000
All other combinations 1
Truth table for P output:
INPUTS OUTPUT
P
3P2P1P0P
00000
All other
combinations 1
Truth table for Cn+x output:
INPUTS OUTPUT
G
0P0CnCn+x
0XX1
X011
All other
combinations 0
ComponentRef.book Page 32 Thursday, December 7, 2006 10:12 AM