UART features fractional baud rate generator.

Press Release Summary:

Capable of data transmissions at 8 Mbps, 8-channel Universal Asynchronous Receiver Transmitter XR16V798 is 2.25-3.6 V device with 5 V tolerant inputs. It features 64-byte Transmit and Receive FIFOs, automatic RTS/CTS or DTR/DSR hardware flow control, automatic software flow control, RS-485 half-duplex direction control, and 16C550 register set. UART is suited for applications such as remote access servers, network management, and multi-port RS-232/RS-422/RS-485 communications cards.

Original Press Release:

Exar Introduces Maximum Performance (8Mbps) UART First in a Series Addressing High-Speed Data Transmission Requirements of Cutting-Edge Industrial Applications

Fremont, California, January 30, 2006 - Exar Corporation (Nasdaq: EXAR), a leading provider of high-performance, mixed-signal silicon solutions for the worldwide communications infrastructure, announced today its highest-performance Universal Asynchronous Receiver Transmitter (UART). It will be added to Exar's 8-bit serial communications portfolio one of the industry's broadest UART offerings. The eight-channel XR16V798 is the first in a new generation of 8Mbps devices targeted at supporting faster data transmission speeds required by cutting edge industrial applications including remote access servers, network management, factory automation/process control and multi-port RS-232/RS-422/RS-485 communications cards.

"Exar's technology innovations are based on the Company's unique expertise and understanding of the serial communications markets and customer requirements," said Levent Ozcolak, divisional vice president and general manager, Interface Products Division. "For example, the XR16V798's fractional baud rate generator can accept any external clock to generate the desired baud rate; this eliminates the need for an additional clock source and results in saving on both board space and cost."

Product Details

The XR16V798 is a 2.25V to 3.6V device with 5V tolerant inputs. The device features 64-byte Transmit (TX) and Receive (RX) FIFOs with fully programmable trigger levels, automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis, automatic software (Xon/Xoff) flow control, RS-485 half-duplex direction control with programmable turn-around delay, Intel or Motorola bus interface and sleep mode with a wake-up indicator. It also has the industry standard 16C550 register set, and is pin-for-pin compatible with Exar's XR16L788 (8-channel, 8-bit data bus) device.

"At 8Mbps, the XR16V798 breaks new ground for Exar and offers customers the best overall solution to quickly react to the rapid time-to-market demands of next generation industrial applications." said Eric Nguyen, senior strategic marketing manager, Interface Products Division.

Tools and Support

The XR16V798 is supported by Exar's UART software drivers for popular operating systems including Windows 2000, XP and Linux. With the availability of software drivers and Exar's application support line, UART customers can accelerate implementation by eliminating driver development, testing and diagnostic procedures.

Packages and Availability

The XR16V798 is available now in 100-pin QFP packages at $20.13 for 1,000 pieces. The device operates over the industrial temperature range of -40oC to +85oC. Additional information on the product can be found at URL and other UART Products at

All Exar products are European RoHS compliant except for lead. Lead-free products are also available upon request.

About Exar

Exar Corporation, now celebrating its 20th year on Nasdaq, designs, develops and markets high-performance, analog and mixed-signal silicon solutions for the worldwide communications infrastructure. Leveraging its industry-proven analog design expertise, system-level knowledge and standard CMOS process technologies, the Company provides OEMs innovative, highly-integrated ICs that facilitate the transport and aggregation of signals in access, metro and wide area networks. The Company's physical layer silicon solutions address transmission standards such as T/E carrier, ATM and SONET. The Company also provides one of the industry's most comprehensive family of serial communications solutions. Within this product offering, the low voltage and multi-channel universal asynchronous receiver transmitters are particularly well suited to support high data rate and increasing data transfer efficiency requirements for various industrial, telecom and computer server applications. In additi on, the Company offers a portfolio of clock generation and clock distribution devices for a wide range of communications systems. The Company is based in Fremont, CA, had fiscal 2005 revenues of $57.4 million, and employs approximately 260 people worldwide. For more information about the Company visit:

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