GENERAL 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.

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
• Requires a single +3.3V Power Supply
• 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