Communications

UARTs offer as much as 8x reduction in board space

29th January 2014
Staff Reporter
0

Designed for the Intel LPC motherboard bus, the XR28V382 and XR28V384 UARTs have been announced by Exar. The UARTs reduce footprint while increasing data integrity and throughput by providing 28B FIFOs.

 

Packaged in a 5 x 5mm 32 pin QFN, the XR28V382 includes two UART channels, while the XR28V384 has four UART channels in a 7 x 7mm 48 pin TQFP. Compared to 128 pin super I/O devices, the dual and quad LPC UARTs offer the same or more serial channels in a significantly smaller footprint, offering as much as 8x reduction in board space.

Both devices feature Exar’s automatic half duplex control for RS-485 networks. These parts feature 128B transmit and receive FIFOs, are rated for the industrial temp range, and operate at 3.3V.  Each UART channel supports serial data rates up to 3Mbps.

“These new LPC UARTs are a great replacement or supplement for a super I/O device when the primary need is serial connectivity,” said Jack Roan, product marketing manager, Exar.  “They are also an excellent alternative to USB UARTs; they interface directly with the system BIOS so there is no need to install a driver, and they are inherently compatible with multiple operating systems because the device is configured before the OS loads.”

The devices have been designed for use in industrial PCs, factory automation, process controllers, network routers, and single board embedded computers. Pricing for the XR28V382 and XR28V384 are $2.40 and $3.50 respectively, in 1,000-unit quantities.

 

 

 

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