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UARTs operating at 1.8V target battery-powered apps

Posted: 07 Aug 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Exar? XR16M? XR68M? UART?

Exar Corp.'s latest UART series features a programmable fractional baud rate generator with prescaler, 16byte, 32byte and 64byte FIFO choices, and low voltage operating levels.

At 1.8V operating levels and a data-transfer speed of 16Mbps, the XR16M and XR68M series is suitable for a variety of battery operated consumer products. They include portable devices, cellular data devices and industrial applications such as factory automation/process control, telecommunications and routers.

The XR16M and XR68M series consists of six devices, including the XR16M2550, XR16M2551, XR16M2650, XR16M2651, XR16M752 and XR68M752. All devices share a common feature set, including a fractional baud rate generator, automatic sleep mode, automatic hardware and software flow controls, a wireless infrared encoder/decoder and selectable TX and RX FIFO trigger levels.

The series is compliant with both Intel and Motorola bus interfaces. The XR16M2550/51 series are16byte FIFO devices; the XR16M2650/51 series are 32byte FIFO devices; and the XR16M752 and XR68M752 are 64byte FIFO devices. The XR16M2551 and XR16M2651 have an additional PowerSave mode, which reduces the sleep current to a minimum during sleep modes.

All devices in the series are supported by standard serial port software drivers for popular OSes including Windows CE 4.2 and 5.0, XP and Linux. They come in 48-pin TQFP and 32-pin QFN packages and operate over the industrial temperature range.

All six are currently available and are priced in the mid-$3 range for 1,000-piece quantities.

- Ismini Scouras

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