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

SC16C550B

The SC16C550B 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 3 Mbit/s.

The SC16C550B is pin compatible with the ST16C550, TL16C550 and PC16C550, and it will power-up to be functionally equivalent to the 16C450. The SC16C550B also provides DMA mode data transfers through FIFO trigger levels and the TXRDY and RXRDYsignals (TXRDY and RXRDY are not supported in the HVQFN32 package). 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 loopback capability allows on-board diagnostics.

The SC16C550B operates at 5 V, 3.3 V and 2.5 V, and the Industrial temperature range, and is available in plastic HVQFN32, DIP40, PLCC44 and LQFP48 packages.

製品詳細

Features

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)

部品番号： SC16C550BIB48, SC16C550BIBS.

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