XRT86VL34数据手册集成电路（IC）的电信规格书PDF

描述 Description

Building on Exar's heritage of delivering market-proven silicon solutions, the Company is capitalizing on its already established functional element devices: Line Interface Unit (LIU), framers, etc., and is combining them into one highly integrated product. The XRT86VL38 and XRT86VL34 greatly reduce board space requirements. They are targeted at telecommunications equipment including SONET/SDH and T1/E1/J1 multiplexers, digital cross-connect systems, wireless base stations, routers among others.
Product Details
The XRT86VL34 is offered in a four-channel version incorporating a T1/E1 (1.544 Mbit/s or 2.048 Mbt/s) framer and a LIU per channel. Each of the framers has its own framing synchronizer and transmit-receive slip buffers. The slip buffers can be independently enabled or disabled as required. Each framer also contains a transmit and overhead data input port, which permits data line terminal equipment direct access to the out-bound T1/E1/J1 frames. The device has a flexible microprocessor interface for easy configuration, control, and status monitoring. Furthermore, the device supports Channel Associated Signaling (CAS), Common Channel Signaling (CCS), supports ISDN primary Rate Interface (ISDN PRI) signaling and has three integrated HDLC Controllers with two 96-byte transmit HDLC buffers and two 96-byte receive buffers per channel. In addition, the XRT86VL34 includes a PRBS, QRSS and network loop code generator/receiver. It also detects OOF, LOF, LOS errors and COFA conditions.
R³ Technology™ Overview
Exar's R³ Technology™ (Reconfigurable, Relayless Redundancy) delivers key benefits to customers designing T1/E1/J1 interface cards. The devices are Reconfigurable with integrated termination supporting all common T1/E1/J1 line impedances enabling customers to build one board with a single bill-of-materials. (Conventional approaches require fixed settings - T1, or E1, or J1, forcing customers to estimate both market needs, and choose device settings before manufacturing.) Also, the series employs Relayless Redundancy eliminating the need for external relays for 1:1 and 1+1 applications by establishing a back-up channel that can be brought on-line in the event of failure.

特性 Features

·Four-channel Independent, Full Duplex DS1 Tx and Rx Framers and LIUs·Interfaces with Leading Microprocessors: Intel, Motorola, MIPS, Power PC·Three Integrated HDLC Controllers with Two 96-byte Transmit HDLC Buffers and Two 96-byte Receive Buffers per Channel·Pb-Free, RoHS Compliant Versions Offered

应用 Application

·Channel Service Units (CSUs)·Digital Access Cross-connect Systems (DACs)·Wireless Base Stations·Voice Over Packet Gateways·Framer Relay Switches and Access Devices (FRADS)