The CD4043 are quad cross couple 3-STATE CMOS NOR latches, each latch has a separate Q output and individual SET and RESET inputs. There is a common 3-STATE ENABLE input for all 4 latches. A logic "1" on the ENABLE input connects the latch states to the Q outputs. A logic "0" on the ENABLE input disconnects the latch states from the Q outputs resulting in an open circuit condition on the Q output. The 3-STATE feature allowscommon bussing of the outputs.