Date: 10/02/2009

Single-channel multi-supply voltage UART series with VLIO bus interface

Exar Corporation released another low voltage single-channel UART series composed of three devices with advanced features. The XR16M581/M681/M781 UARTs include support for the VLIO bus interface as well as multiple package, supply voltage, and FIFO sizes, which provide users more flexibility and design options. The product finds applications including smart phones, Bluetooth, Personal Digital Assistants (PDAs), GPS systems, gaming systems as well as a variety of industrial and telecommunications applications.

Details of features:

1. The XR16M581, XR16M681, and XR16M781 series has a VLIO bus interface, which multiplexes the address and data lines to reduce the number of signals on both the processor and the UART.
2. These devices also have Sleep and PowerSave modes to minimize power consumption.
3. The XR16M581 is a 16-byte FIFO device; the XR16M681 is a 32-byte FIFO device, and the XR16M781 is a 64-byte FIFO device.
4. This series of products can provide, multiple supply voltages, and support for the data rates up to 20 Mbps.
5. All the devices share a common set of features including

1. Auto RTS/CTS Hardware Flow Control
2. Auto XON/XOFF Software Flow Control
3. TX/RX FIFO Counters
4. Selectable or programmable transmit and receive FIFO trigger levels
5. Fractional and Independent TX/RX Baud Rate Generators
6. Auto RS-485 Half-Duplex Direction Control
7. Multidrop mode with address detect
8. Infrared mode

Availability:
1. Samples of the XR16M581, XR16M681 and XR16M781 are available now
2. Evaluation boards, reference designs, and software drivers are also available.

Prices:
1. In 1k quantities the XR16M581 is priced at $1.80
2. In 1k quantities the XR16M681 is priced at $1.90
3. In 1k quantities the XR16M781 is priced at $2.05

Packages:

1. XR16M581 is available in 24-pin QFN, 25-pin BGA, and a 32-pin QFN at 1.62V to 3.63V of operation
2. XR16M681 is available in 24-pin QFN, 25-pin BGA, and a 32-pin QFN at 1.62V to 3.63V of operation
3. XR16M781 is available in 24-pin QFN, 25-pin BGA, and a 32-pin QFN at 1.62V to 3.63V of operation

Additional information on this product can be found at: www.exar.com