The Texas Instruments CD74HC368E is a 74HC-series hex buffer and inverter with 3-state outputs, packaged in a 16-pin DIP for through-hole mounting. It combines two elements: one 2-bit and one 4-bit (hex) buffer/inverter, giving you six channels of inverting logic with a common output-enable control.
Output drive and 3-state bus control
The 3-state outputs let you share a data bus across multiple devices — pull the output-enable pin high and the outputs go high-impedance, no bus contention. For a field repair, this means you can swap the IC without worrying about a powered bus fighting you, as long as the enable is held inactive.