XRT75R06

www.DataSheet4U.com áç DECEMBER 2004 XRT75R06 REV. 1.0.0 SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR attenuator performance meets the ETSI TBR-24 and Bellcore GR-499 specifications. The XRT75R06 provides a Parallel Microprocessor Interface for programming and control. The XRT75R06 supports analog, remote and digital loop-backs. The device also has a built-in Pseudo Random Binary Sequence (PRBS) generator and detector with the ability to insert and detect single bit error for diagnostic purposes. GENERAL DESCRIPTION The XRT75R06 is a six channel fully integrated Line Interface Unit (LIU) featuring EXAR’s R3 Technology (Reconfigurable, Relayless, Redundancy) for E3/ DS3/STS-1 applications. The LIU incorporates 6 independent Receivers, Transmitters and Jitter Attenuators in a single 217 Lead BGA package. Each channel of the XRT75R06 can be independently configured to operate in E3 (34.368 MHz), DS3 (44.736 MHz) or STS-1 (51.84 MHz). Each transmitter can be turned off and tri-stated for redundancy support or for conserving power. The XRT75R06’s differential receiver provides high noise interference margin and is able to receive data over 1000 feet of cable or with up to 12 dB of cable attenuation. The XRT75R06 incorporates an advanced crystalless jitter attenuator per channel that can be selected either in the transmit or receive path. The jitter FIGURE 1. BLOCK DIAGRAM OF THE XRT 75R06 APPLICATIONS E3/DS3 Access Equipment DSLAMs Digital Cross C...