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Dual UART trio offers low power for consumer, portable apps

Fremont, Calif.—Exar Corp. launched the XR16M275x series that consists of three 8-Mbits/s, 1.62-V dual UARTs, or DUARTs, targeting consumer and portable applications, Ethernet and network routers, cellular data devices and factory automation and process controls.

The devices support programmable FIFO trigger level and FIFO level counters, automatic hardware (RTS/CTS) and software flow control with hysteresis control, automatic RS-485 half duplex direction control output and a complete modem interface.

An internal loop back capability allows system diagnostics. Independent programmable fractional baud rate generators are provided in each channel to select data rates up to 8-Mbits/s at 3.3V and 8X sampling clock.

Additionally, each UART channel has 64-bytes of transmit and receive FIFOs plus a special character software flow control and an infrared encoder/decoder (IrDA ver 1.0). The XR16M275x series can operate from 1.62V to 3.63V.

The XR16M275x devices offer on-board registers that provide the user with operational status and data error flags. In addition, the XR16M2751 supports both Intel and Motorola bus interfaces and has a Power-Save feature that isolates the data bus interface to further reduce power consumption in the sleep mode.

The XR16M275x series supports standard serial port drivers as well as Windows CE drivers. With the availability of software drivers and Exar's application support line, customers can accelerate their time to market by minimizing driver development, testing and diagnostic procedures.

Pricing: In the mid-to-upper-$3 range in 1,000 piece quantities.
Availability: Sampling now.

The XR16M2750 is offered in a 48-pin TQFP and 32-pin QFN package.
Datasheet: click here.

The XR16M2751 is offered in a 48-pin TQFP.
Datasheet: click here.

The XR16M2752 is offered in a 44-pin PLCC and 32-QFN package.
Datasheet: click here.

Exar Corp., 1-510-668-7000, www.exar.com

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