XRT72L13

• A fully integrated device that supports: Multiplexing/Demultiplexing Mode Clear Channel DS3 Framer Mode High Speed HDLC Controller Mode
• Supports Multiple Loop-back modes
• Smooths gapped clock signals
• Supports Intel or Motorola PIO µP interfaces
• Available in a 208 pin PQFP package
• Single 3.3V Power Supply
• 5V Tolerant I/O
• Operates over the Industrial Temperature Range

The XRT72L13 is a fully integrated, low power, Multiplexer/ Framer IC which performs Multiplexing/Demutiplexing of 28 DS1or 21 E1 signals into/from a DS3 signal with either M13 or C-bit parity frame format, performs Clear Channel DS3 Framing, and supports High speed HDLC/LAPD data linking.

The XRT72L13 also contains M12 and M23 bit-interleaving multiplexing/demultiplexing functions with
necessary stuffing and destuffing control. Seven internal DS2/G.747 framers are included to support Mux/Demux purposes.

The XRT72L13 contains an integral DS3 Framer which provides Clear Channel DS3 Framing and Error Accumulation in accordance with ANSI/ITU-T specifications.

The XRT72L13 provides the intelligent functions of DS3/DS2 mode control, signaling control, error and alarm reporting and handles the HDLC/LAPD data link through internal registers accessible via an 8-bit parallel, memory mapped, µProcessor interface.