The MC68B50P is a 24-pin DIP (Dual Inline Package) from Motorola. It is an asynchronous communications element (ACE) that is used to provide a variety of communications functions. It is designed to be used in asynchronous serial data communications systems.

Features:

• Asynchronous communications element (ACE)
• Supports full duplex and half duplex operation
• Supports data rates up to 19.2K baud
• Supports 5, 6, 7, and 8-bit character formats
• Supports parity checking
• On-chip baud rate generator
• On-chip transmit and receive buffers
• On-chip status and control registers

Applications:

• Modem control
• Data communications
• Terminal control
• Printer control
• Instrumentation control (For reference only) https://www.utsource.net/itm/p/135512.html