SC16C550

5V, 3.3V and 2.5V 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 3Mbits/s transmit/receive operation at 5V, 2Mbits/s at 3.3V, and 1Mbit/sat 2.5V
16 byte transmit FIFO
16 byte receive FIFO with error flags
Programmable auto-RTS</a> and auto-CTS</a>
      In auto-CTS</a> mode,CTS</a> controls transmitter
      In auto-RTS</a> mode, RxFIFO contents and threshold control RTS</a>
Automatic software/hardware flow control
Programmable Xon/Xoff characters
Software selectable Baud Rate Generator
Four selectable Receive 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)
Independent receiver clock input
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-, 1¹/₂-, or 2-stop bit
    Baud generation (DC to 3Mbit/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</a>,RTS</a>,DSR</a>,DTR</a>,RI</a>,DCD</a>).

The SC16C550 is a Universal Asynchronous Receiver and Transmitter (UART) used for serial data communications. Its principal function is to convert parallel data into serial data, and vice versa. The UART can handle serial data rates up to 3Mbits/s.

The SC16C550 is pin compatible with the ST16C550, TL16C550 and PC16C550, and it will power-up to be functionally equivalent to the 16C450. Programming of control registers enables the added features of the SC16C550.Some of these added features are the 16- byte receive and transmit FIFOs,automatic hardware or software flow control and Infrared encoding/decoding.The selectable auto-flow control feature significantly reduces software overload and increases system efficiency while in FIFO mode by automatically controlling serial data flow using RTS</a> output and CTS</a> input signals.The SC16C550 also provides DMA mode data transfers through FIFO trigger levels and the TXRDY</a> and RXRDY</a> signals. On-board status registers provide the user with error indications, operational status, and modem interface control. System interrupts may be tailored to meet user requirements.An internal loop-back capability allows on-board diagnostics.

The SC16C550 operates at 5V, 3.3V and 2.5V, and the Industrial temperature range, and is available in plastic DIP40, PLCC44 and LQFP48 packages.