- Flexibility: 2, 4 or 8 asynchronous serial ports. 2 and 4 ports available in dedicated RS-423, 4/8 ports available in switchable RS-232/422/485 and now, 8 ports in switchable RS-232/422/485/TTL.
- Speed: Data transfer speeds range from 50 bps to 1.8432 Mbps.
- Performance: Each port is controlled by a high performance UART, providing 64 bytes of transmit and receive FIFO buffers.
- Adaptability: Supports three RS-485 modes: Full Duplex, Half Duplex and Multi-drop. (TTL models supports Full Duplex only.)
- Ruggedness: Operates within a temperature range of -40°C to +85°C (-40°F to +185°F).
**Not recommended for new designs.**