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Home » NEWEST Products » New by Manufacturer » Exar » Exar XR20M1280 Single-Channel UARTs
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Exar XR20M1280 Single-Channel UARTs with Integrated Level Shifters

The Exar XR20M1280 is the industry's fastest UART with a selectable I²C/SPI interface. Exar XR20M1280 single-channel UARTs with integrated level shifters have a maximum data rate of 24 Mbps with a maximum clock frequency on the SPI interface of 26 MHz. The XRM20M1280 has separate VCC pins for core, CPU interface, UART signals, and GPIO signals allowing the UART to interface with devices operating at different voltage levels and eliminating the need for external voltage level shifters. The independent TX/RX Baud Rate Generator feature allows the transmitter and receiver to operate at different baud rates. The XR20M1280 has a 16550 compatible register set that provide users with operating status and control, receiver error indications, and modem serial interface controls. An internal loopback capability allows onboard diagnostics. XR16M890 single-channel UARTs can interface with devices operating at different voltage levels, eliminating the need for external voltage-level shifter. These Exar single-channel UARTs target a variety of portable applications, including smart phones, Bluetooth®, personal digital assistants, GPS systems, and other battery operated devices.

  • Integrated Level Shifters on CPU interface, UART and GPIO signals
  • Selectable I²C/SPI bus interface
  • 26MHz maximum SPI clock
  • 24Mbps maximum UART data rate
  • Up to 16 GPIOs
  • 128-Bytes TX and RX FIFOs
  • Programmable TX/RX trigger levels
  • TX/RX FIFO Level Counters
  • Independent TX/RX Baud Rate Generator
  • Fractional Baud Rate Generator
  • Sleep Mode with Automatic Wake-up
  • Infrared (IrDA 1.0 and 1.1) mode
  • 1.62V to 3.63V supply operation with 5V tolerant inputs
  • Crystal oscillator or external clock input
  • Personal Digital Assistants (PDA)
  • Cellular Phones/Data Devices
  • Battery-Operated Devices
  • Global Positioning System (GPS)
  • Bluetooth
Part Number Package GPIOs
XR20M1280IL24 QFN-24 4
XR20M1280IL32 QFN-32 8
XR20M1280IL40 QFN-40 16

Block Diagram

Block Diagram
  • Exar
  • Semiconductors|Integrated Circuits|IC-Interface