5 V, 3.3 V and 2.5 V Quad UART, 5 Mbit/s (max.), with 64-byte FIFOs and Infrared (IrDA) Encoder/Decoder


Product Details

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  • 4 channel UART
  • 5 V, 3.3 V and 2.5 V operation
  • Industrial temperature range (-40 Cel to +85 Cel)
  • SC16C654B is pin and software compatible with the industry-standard ST16C454/554, ST16C654, ST68C454/554, TL16C554
  • SC16C654DB is pin and software compatible with ST16C654D, and software compatible with ST16C454/554, ST68C454/554, TL16C554
  • Up to 5 Mbit/s data rate at 5 V and 3.3 V and 3 Mbit/s at 2.5 V
  • 5 V tolerant inputs
  • 64-byte transmit FIFO
  • 64-byte receive FIFO with error flags
  • Automatic software (Xon/Xoff)/hardware (RTS/CTS) flow control
  • Programmable Xon/Xoff characters
  • Software selectable baud rate generator
  • Four selectable Receive and Transmit FIFO interrupt trigger levels
  • Standard modem interface or infrared (IrDA) encoder/decoder interface
  • Sleep mode
  • Standard asynchronous error and framing bits (Start, Stop, and Parity Overrun Break)
  • Transmit, Receive, Line Status, and Data Set interrupts independently controlled
  • 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 (DC to 5 Mbit/s)
  • False start-bit detection
  • Complete status reporting capabilities
  • 3-state output TTL drive capabilities for bi-directional data bus and control bus
  • Line break generation and detection
  • Internal diagnostic capabilities:
    • Loop-back controls for communications link fault isolation
  • Prioritized interrupt system controls
  • Modem control functions (CTS, RTS, DSR, DTR, RI, CD).


Quick reference to our documentation types.

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Design Resources

Design Files

2 design files

  • Symbols and Footprints

    SC16C654BIBM-LQFP64-CAD Symbol and PCB Footprint – BXL File

  • Symbols and Footprints

    SC16C654BIA68-PLCC68-CAD Symbol and PCB Footprint – BXL File

Engineering Services

3 engineering services

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