5 V, 3.3 V and 2.5 V UART with 16-Byte FIFOs


Product Details


Key Features

  • 5 V, 3.3 V and 2.5 V operation
  • Industrial temperature range
  • After reset, all registers are identical to the typical 16C450 register set
  • Capable of running with all existing generic 16C450 software
  • Pin compatibility with the industry-standard ST16C450/550, TL16C450/550, PC16C450/550
  • Up to 3 Mbit/s transmit/receive operation at 5 V, 2 Mbit/s at 3.3 V and 1 Mbit/s at 2.5 V
  • 5 V tolerant on input only pins
  • 16 byte transmit FIFO
  • 16 byte receive FIFO with error flags
  • Programmable auto-RTS and auto-CTS
  • In auto-CTS mode, CTS controls transmitter
  • In auto-RTS mode, RX FIFO contents and threshold control RTS
  • Automatic hardware flow control
  • Software selectable baud rate generator
  • Four selectable receive FIFO interrupt trigger levels
  • Standard modem interface
  • Standard asynchronous error and framing bits (start, stop and parity overrun break)
  • Independent receiver clock input
  • Transmit, receive, line status and data set interrupts independently controlled
  • False start-bit detection
  • Complete status reporting capabilities
  • 3-state output TTL drive capabilities for bidirectional data bus and control bus
  • Line break generation and detection
  • Internal diagnostic capabilities. Loopback controls for communications link fault isolation
  • Prioritized interrupt system controls
  • Modem control functions (CTS, RI, DCD, DSR, DTR, RTS)

Fully Programmable Character Formatting

  • 5, 6, 7, or 8-bit characters
  • Even, odd, or no-parity formats
  • 1, 1 1/2, or 2-stop bit
  • Baud generation (up to 3 Mbit/s)

Part numbers include: SC16C550BIB48, SC16C550BIBS.


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