Exar's XRT86LXX incorporates the company's unique line interface unit (LIU) and framer in an innovative combination device. The XRT86L30 (single-channel) and XRT86L32 (dual-channel) are targeted at telecom equipment including wireless base-stations, digital access and cross connect systems, and channel service units (CSUs) among others.
"The XRT86L30 and XRT86L32, built on the successful market adoption of the XRT86L38 (eight-channel) and XRT86L34 (four-channel) devices, give our OEM customers additional design choices and enhanced functionality," said Bahram Ghaderi, vice president and general manager, network and transmission products division.
"Like the XRT86L34 and XRT86L38, the XRT86L30 and XRT86L32 incorporate our proprietary R3 technology which has seen significant traction in key markets. These devices continue Exar's long-term product strategy of taking industry-tested functional device elements (offered in initial products T1/E1/J1 LIUs, framers etc), capitalising on their subsequent multichannel versions, and then combining their capabilities into a highly integrated device."
Both the XRT86L30 and XRT86L32 have a physical-layer processor incorporating a T1/E1 (1,544 Mbps or 2,048 Mbps) framer and an LIU. They also include a PRBS, QRSS and network loop up/down code generator/detector to support fault detection. The devices have an integrated HDLC controller with two 96 byte transmit, and two 96 byte receive HDLC buffers (for each channel). The line interface portion of the XRT86L30 (single-channel) and XRT86L32 (dual-channel) are based on Exar's XRT83L30 (introduced in 2001) and leverages the XRT83L34 interface capabilities that customers already rely on for uninterrupted data transmission.
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