Exar Corporation XRT7300
The XRT7300 DS3/E3/STS-1 Line Interface Unit is designed to be used in DS3, E3 or SONET STS-1 applications and consists of a line transmitter and receiver integrated on a single chip. The XRT7300 also contains a 4-Wire Microprocessor Serial Interface for accessing the on-chip Command registers. In the transmit direction, the XRT7300 encodes input data to either B3ZS (for DS3/STS-1 applications) or HDB3 (for E3 applications) format and converts the data into the appropriate pulse shapes for transmission over coaxial cable via a 1:1 transformer.| Part No. | XRT7300 |
|---|---|
| Datasheet | XRT7300 Download |
| Manufacturer |  Exar Corporation |
| Description | E3/DS3/STS-1 LINE INTERFACE UNIT |
| Buy | Stock & Price |
GENERAL DESCRIPTION
XRT7300 can be configured to support the E3 (34.368 Mbps), DS3 (44.736 Mbps) or the SONET STS-1 (51.84 Mbps) rates. In the receive direction the XRT7300 performs equalization on incoming signals, performs Clock Recovery, decodes data from either B3ZS or HDB3 format, converts the receive data into TTL/CMOS format, checks for LOS or LOL conditions and detects and declares the occurrence of line code violations. FIGURE 1. BLOCK DIAGRAM OF THE XRT7300 E3 STS-1/DS3 Host/(HW)FEATURES
● Meets E3/DS3/STS-1 Jitter Tolerance Requirements● Full Loop-Back Capability
● Transmit and Receive Power Down Modes
● Full Redundancy Support
● Contains a 4-Wire Microprocessor Serial Interface
● Uses Minimum External components
● Requires Single +5V Power Supply
● -40°C to +85°C Operating Temperature Range
● Available in a 44 pin TQFP package
APPLICATIONS
● Interfaces to E3, DS3 or SONET STS-1 Networks● CSU/DSU Equipment
● PCM Test Equipment
● Fiber Optic Terminals
● Multiplexers NOTE:...
