XRT72L13 Datasheet | Unknown Manufacturer

DESCRIPTION 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. FEATURES - 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 APPLICATIONS - M13 Multiplexer/Demuliplexer Applications. - Frame Relay Systems - Digital Access and Cross Connect Systems - Local Digital Switch - Add/Drop Multiplexers - DS3 Data/Channel Service Units. - Test Equipment FIGURE 1. BLOCK DIAGRAM OF THE XRT72L13 MULTIPLEXER/FRAMER Tx HDLC Tx HDLC Controller Controller Tx HDLC[0:7] Tx HDLCClk Send_FCS Tx DS1[0:27] Tx POS Tx NEG Tx Line Clk M23 M23 MUX MUX M12 M12 MUX MUX Tx Clk[0:27] Clear Channel Clear Channel DS3 Framer DS3 Framer Rx POS Rx NEG Rx Line Clk DS2 or G.747 Data Streams 32/64 Bit De-Jitter FIFO M23 M23 DEMUX DEMUX M12 DEMUX Rx DS1[0:27] Rx Clk[0:27] Microprocessor Microprocessor Interface Interface Rx HDLC...