these hex buffers and line drivers are designed specifically to improve both the performance and density of three-state memory address drivers clock drivers and bus-oriented receviers and transmitters. the designer has a choice of selected combinations of inverting and noninverting outputs symmetrical g (active-low control) inputs. the sn54hc family is characterized for operation over the full military temperature range of -55c to 125c. the sn74hc family is characterized for operation from -40c to 85c.