Exar Corporation XRT82D20
The XRT82D20 is a fully integrated, single channel, Line Interface Unit (Transceiver) for 75 Ω or 120 Ω E1 (2.048 Mbps) applications. The LIU consists of a receiver with adaptive data slicer for accurate data and clock recovery and a transmitter which accepts either single or dual-rail digital inputs for signal transmission to the line using a low- impedance differential line driver. The LIU also includes a crystalless jitter attenuator for clock and data smoothing which, depending on system requirements, can be selected in either the transmit or receive path.| Part No. | XRT82D20 |
|---|---|
| Datasheet | XRT82D20 Download |
| Manufacturer |  Exar Corporation |
| Description | SINGLE CHANNEL E1 LINE INTERFACE UNIT |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Coupling the XRT82D20 to the line requires transformers on both the Receiver and Transmitter sides, and supports both 120 Ω balanced and 75 Ω unbalanced interfaces. The receiver can be capacitive coupled to for cost reductionFEATURES
● Complete E1 (CEPT) line interface unit● Generates transmit output pulses that are compliant with the ITU-T G.703 Pulse Template for 2.048Mbps (E1) rates
● On-Chip Pulse Shaping for both 75 Ω and 120 Ω Line Drivers FIGURE 1. BLOCK DIAGRAM OF THE XRT82D20
● Clock Recovery and Selectable Crystal-less Jitter attenuator
● Compliant with ETS300166 Return Loss
● Compliant with the ITU-T G.823 Jitter Tolerance Requirements
● Remote, Local and Digital Loop backs
● Declares and Clears LOS per ITU-T G.775
● Logic Inputs accept either 3.3V or 5.0V levels
● - 400C to 850C Temperature Range
● Low Power Dissipation; 145mW with 120 Ω or 160mW with 75 Ω typical
● +3.3V or +5V Supply Operation
● Pin Compatible with the XRT7288
APPLICATIONS
● PDH Mult...
