ADI MAX3100CPD

The MAX3100 universal asynchronous receiver transmitter (UART) interfaces the SPI/MICROWIRE-compatible, synchronous serial data from a microprocessor (μP) to asynchronous, serial-data communication ports (RS-232, RS-485, IrDA). The MAX3100 combines a simple UART and a baudrate generator with an SPI interface and an interrupt generator. Configure the UART by writing a 16-bit word to a write-configuration register, which contains the baud rate, data-word length, parity enable, and enable of the 8-word receive first-in/first-out (FIFO). The write configuration selects between normal UART timing and IrDA timing, controls shutdown, and contains 4 interrupt mask bits. Transmit data by writing a 16-bit word to a write-data register, where the last 7 or 8 bits are actual data to be transmitted.

• Small TQFN and QSOP Packages Available
• Full-Featured UART:
  • IrDA SIR Timing Compatible
  • 8-Word FIFO Minimizes Processor Overhead at High Data Rates
  • Up to 230k Baud with a 3.6864MHz Crystal
  • 9-Bit Address-Recognition Interrupt
  • Receive Activity Interrupt in Shutdown
• SPI/MICROWIRE-Compatible μc Interface
• Lowest Power:
  • 150μA Operating Current at 3.3V
  • 10μA in Shutdown with Receive Interrupt
• +2.7V to +5.5V Supply Voltage in Operating Mode
• Schmitt-Trigger Inputs for Opto-Couplers
• TX and RTS Outputs Sink 25mA for Opto-Couplers

• Handheld Instruments
• Intelligent Instrumentation
• UART in SPI Systems
• Small Networks in HVAC or Building Control
• Isolated RS-232/RS-485: Directly Drives Opto-Couplers
• Low-Cost IR Data Links for Computers/Peripherals