GENERAL DESCRIPTION
 The XR16M25501 (M2550) is a high performance dual universal asynchronous receiver and transmitter (UART) with 16 bytes TX and RX FIFOs.
The device operates from 1.62 to 3.63 volts and is pin-to-pin and software compatible to the ST16C2550, XR16L2550, and XR16V2550.
It supports Exar’s enhanced features of selectable FIFO trigger level, automatic hardware (RTS/CTS) and software flow control, and a complete modem interface.
Onboard registers provide the user with operational status and data error flags. An internal loopback capability allows system diagnostics.
Independent programmable baud rate generators are provided in each channel to select data rates up to 16 Mbps at 3.3 Volt with 4X sampling clock.
The M2550 is available in 48-pin TQFP and 32-pin QFN packages.

FEATURES
* 1.62 to 3.63 Volt Operation
* Pin-to-pin and software compatible to ST16C2550 in the 48-TQFP package
* Pin-to-pin and software compatible to XR16L2550 and XR16V2550
* Two independent UART channels
- Register set is 16550 compatible
- Data rate of up to 16 Mbps at 3.3 V
- Data rate of up to 12.5 Mbps at 2.5 V
- Data rate of up to 8 Mbps at 1.8V
- Fractional Baud Rate Generator
- Transmit and Receive FIFOs of 16 bytes
- Selectable TX and RX FIFO Trigger Levels
- Automatic Hardware (RTS/CTS) Flow Control
- Automatic Software (Xon/Xoff) Flow Control
- Wireless Infrared (IrDA 1.0) Encoder/Decoder
- Automatic sleep mode
- Full modem interface
* Device Identification and Revision
* Crystal oscillator (up to 24MHz) or external clock (up to 64MHz) input
* 48-TQFP and 32-QFN packages

APPLICATIONS
* Portable Appliances
* Telecommunication Network Routers
* Ethernet Network Routers
* Cellular Data Devices
* Factory Automation and Process Controls

XR16M2550IL32
XR16M2550IM48

XR16M2550 - HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO