Exar Corporation XRT73R12
The XRT73R12 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 and Transmitters in a single 420 Lead TBGA package. Each channel of the XRT73R12 can be independently configured to operate in E3 (34.368 MHz), DS3 (44.736 MHz) or STS-1 (51.84 MHz).| Part No. | XRT73R12 |
|---|---|
| Datasheet | XRT73R12 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 XRT73R12’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 XRT73R12 provides a Parallel Microprocessor Interface for programming and control. The XRT73R12 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 Optic Terminals FIGURE 1. BLOCK DIAGRAM OF THE XRT 73R12 CS RD WR Addr[7:0] D[7:0] PCLK RDY INT Pmode RESET XRT73R12 CLKOUT_n µProcessor Interface SFM_en RLOL_n E3Clk DS3Clk STS-Clk/12M MUX Peak Detector Slicer Clock & Data Recovery LOS Detector Clock Synthesizer HDB3/ B3ZS...
