Exar Corporation XRT75R12
The XRT75R12 is a twelve channel fully integrated Line Interface Unit (LIU) featuring EXAR’s R3 Technology (Reconfigurable, Relayless Redundancy) for E3/DS3/STS-1 applications. The LIU incorporates 12 independent Receivers, Transmitters and Jitter Attenuators in a single 420 Lead TBGA package. Each channel of the XRT75R12 can be independently configured to operate in E3 (34.368 MHz), DS3 (44.736 MHz) or STS-1 (51.84 MHz).| Part No. | XRT75R12 |
|---|---|
| Datasheet | XRT75R12 Download |
| Manufacturer |  Exar Corporation |
| Description | TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Each transmitter can be turned off and tri-stated for redundancy support or for conserving power. The XRT75R12’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 XRT75R12 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 75R12 attenuator performance meets the ETSI TBR-24 and Bellcore GR-499 specifications. The XRT75R12 provides a Parallel Microprocessor Interface for programming and control. The XRT75R12 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.APPLICATIONS
● E3/DS3 Access Equipment● DSLAMs
● Digital Cross Connect Systems
● CSU/DSU Equipment
● Routers
● Fiber...
