BUY 54LS244 https://www.utsource.net/itm/p/1755035.html
Octal TRI-STATEE Buffers/Line Drivers/Line Receivers
Description: The 54LS244 is an octal bus transceiver with 3-state outputs. It is designed to provide bidirectional data flow between two buses. Features: High speed: tpd = 8.5 ns (typ) at VCC = 5V Low power TTL-compatible inputs Outputs source/sink 24 mA Outputs can be wired-ORed Outputs can be disabled for high impedance Inputs and outputs protected from damage due to static discharge Applications: Data transmission between two buses Data buffering Data multiplexing/demultiplexing (For reference only)