These TRI-STATE bidirectional inverting and non-inverting buffers utilize advanced silicon-gate CMOS technology and are intended for two-way asynchronous communication between data buses They have high drive current outputs which enable high speed operation when driving large bus capacitances These circuits possess the low power dissipation and high noise immunity associated with CMOS circuits but speeds comparable to low power Schottky TTL circuits They can also drive 15 LS-TTL loads The MM54HC243 MM74HC243 is a non-inverting buffer and the MM54HC242 MM74HC242 is an inverting buffer Each device has one active high enable (GBA) and one active low enable (GAB) GBA enables the A outputs and