Exar Adds 3.3V Two-Channel and Four-Channel PCI UARTs to its Broad Data Communications Product Portfolio

10/30/2002 - Exar, a leading provider of high-performance, mixed-signal silicon solutions for the worldwide communications infrastructure, announced the addition of two new low power 3.3V Universal Asynchronous Receiver Transmitter (UARTs), the XR17L152 (two-channel), and XR17L154 (four-channel) PCI Bus interface basedcommunications device. Next in the series, these 3.3V devices it are compliant to leading industry PCI Bus specifications, and targeted at remote access servers,portable communication devices,factory automation and process control. Point-of-Sale (POS), system management and serial port solutions for systems based on CompactPCI, PMC, VME and PC/104Plus industry standards.

"The launch of these 3.3V devices, the XR17L152 and XR17L54 follows the successful introduction, and continuing customer support for the identical pin-to-pin 5V versions (XR17C152 and XR17C154) announced earlier this year," said Dr. Roubik Gregorian, executive VP and general manager Communications Division, CTO. "The combination of supporting this voltage level, and the widespread acceptance of the PCI bus interface enables us to penetrate market segments capitalizing on the growing movement to more power efficient systems standardizing on a common interface."

Product Details
The XR17L152/154 supports a 32-bit data bus that facilitates the transfer of more data bytes during each receiver or transmitter interrupt service reducing the CPU bandwidth requirements. The devices meet 3.3V PCI bus signaling specifications at full 33 MHz clock speed (four times faster than the conventional ISA bus). This provides a direct interface to the system bus eliminating the need need for a PCI-Local bus bridge and as a result reducing system cost, and board space requirements. In addition, its global interrupt source register provides themonitor device status of each receiver and, or transmitter channel commandsestablishing a more efficient use of the operating system's device driver and increasing overall system performance.

The XRT17L152/154 has an auto-configuration facility for plug-and-play installation. Also, the RTS/CTS or DTR/DSR automatic hardware and Xon/Xoff software flow control feature maximizes data throughput for higher system performance. In addition, the automatic RS485 half-duplex direction control output with programmable turn-around delay feature simplifies hardware and software design, and compensates for signal propagation delay in RS485 network installations with long cable lengths.

The internal registers (fifth generation) include the industry standard 16C550, and Exar's enhanced registers for the additional requirements of today's data communications needs. market. Furthermore, tThe devices have programmable selectable TX and RX FIFO trigger levels, FIFO level counters, wireless infrared (IrDA) encoder/decoder, device identification, and sleep mode with wake-up indicator. The device has 64 bytes of TX and RX FIFOs in each UART channel, and is capable of operating up to serial data rates of 3 Mbps. Software drivers supporting leading operating systems are available to be used in conjunction with these devices.

Prices, Packages and Availability
Samples of the XR17L152 and XR17L154 are available nowXXX in 100-pin TQFP packages, supporting commercial and industrial temperature ranges. T the XR17L152 is priced at $10.00 in 1,000 piece quantities, and the XR17L154 is priced at $15.00 in 1,000 piece quantities.

About Exar
Exar Corporation (NASDAQ: EXAR) 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, Exar 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. Additionally, Exar offers ICs for both the serial communications and the video and imaging markets. The Company is based in Fremont, CA, had fiscal 2002 revenues of $55 million, and employs approximately 265 people worldwide.

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