XR16M2551

www.DataSheet4U.com MAY 2007 XR16M2551 HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE REV. 1.0.1 GENERAL DESCRIPTION The XR16M25511 (M2551) is a high performance dual universal asynchronous receiver and transmitter (UART) with 16 byte TX and RX FIFOs. The device operates from 1.62 to 3.63 volts and is pin-to-pin compatible to the XR16L2551 and XR16V2551. The M2551 includes 2 additional capabilities over the XR16M2550: Intel and Motorola data bus selection and a “PowerSave” mode to minimize the sleep current. It supports Exar’s enhanced features of selectable FIFO trigger level, automatic hardware (RTS/CTS) and software flow control, and a complete modem interface. An internal loopback capability allows system diagnostics. Independent programmable fractional baud rate generators are provided in each channel to select data rates up to 16 Mbps at 3.3 Volt and 4X sampling clock. The M2551 is available in 48-pin TQFP and 32-pin QFN packages. NOTE: 1 Covered by U.S. Patent #5,649,122 FEATURES 1.62 to 3.63 Volt Operation Pin-to-pin compatible to Exar’s XR16V2551 and the XR16L2551 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 (Xo...