Quad UART for 3.3 V and 5 V Supply Voltage

  • Archived
  • This page contains information on a product that is no longer manufactured (discontinued). Specifications and information herein are available for historical reference only.

Product Details

Block Diagram

SC28L194 Block Diagram

SC28L194 Block Diagram


  • Single 3.3V and 5.0V power supply
  • Four Philips industry standard full duplex UART channels
  • Sixteen byte receiver FIFOs for each UART
  • Sixteen byte transmit FIFOs for each UART
  • In band flow control using programmable Xon/Xoff characters
  • Flow control using CTSN RTSN hardware handshaking
  • Automatic address detection in multi-drop mode
  • Three byte general purpose character recognition
  • Fast data bus, 15 ns data bus release time, 125 ns bus cycle time
  • Programmable interrupt priorities
  • Automatic identification of highest priority interrupt pending
  • Global interrupt and control registers ease setup and interrupt handling
  • Vectored interrupts with programmable interrupt vector formats
    • Interrupt vector modified with channel number
    • Interrupt vector modified with channel number and channel type
    • Interrupt vector not modified
  • IACKN and DACKN signal pins
  • Watch dog timer for each receiver (64 receive clock counts)
  • Programmable Data Formats:
    • 5 to 8 data bits plus parity
    • Odd, even force or no parity
    • 1, 1.5 or 2 stop bits
  • Flexible baud rate selection for receivers and transmitters:
    • 22 fixed rates; 50 - 230.4K baud or 100 to 460.8K baud
    • Additional non-standard rates to 500K baud with internal generators
    • Two reload-counters provide additional programmable baud rate generation
    • External 1x or 16x clock inputs
    • Simplified baud rate selection
  • 1 MHz 1x and 16x data rates full duplex all channels.
  • Parity, framing and overrun error detection
  • False start bit detection
  • Line break detection and generation
  • Programmable channel mode
    • Normal(full duplex)
    • Diagnostic modes

      automatic echo

      local loop back

      remote loop back

  • Four I/O ports per UART for modem controls, clocks, RTSN, I/O, etc.
    • All I/O ports equipped with 'Change of State Detectors'
  • Two global inputs and two global outputs for general purpose I/O
  • Power down mode
  • On chip crystal oscillator, 2-8 MHz
  • TTL input levels. Outputs switch between full V CC and V SS
  • High speed CMOS technology
  • 80-pin Low Profile Quad Flat Pack LQFP and 68-pin PLCC

Target Applications

  • Statistical Multiplexers
  • Data Concentrators
    • Packet-switching networks
    • Process Control
    • Building or Plant Control
    • Laboratory data gathering
    • ISDN front ends
    • Computer Networks
    • Point-of-Sale terminals
  • Automotive, cab and engine controls
  • Entertainment systems
    • MIDDI keyboard control music systems
    • Theater lighting control
  • Terminal Servers
    • Computer-Printer/Plotter links

Part numbers include: SC28L194A1BE, SC28L194A1A.


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