74LS173.pdf 54LS173 DM74LS173A TRI-STATE 4-Bit D-Type Register May 1992 54LS173 DM74LS173A TRI-STATE 4-Bit D-Type Register General Description This four-bit register contains D-type flip-flops with totem- To minimize the possibility that two outputs will attempt to pole TRI-STATE outputs capable of driving highly capaci- take a common bus to opposite logic levels the output con- tive or low-impedance loads T……