Description
The MT90733 DS3 Framer (DS3F) is designed for mapping broadband payloads into the DS3 frame format, which meets ANSI’s T1.107-1988 and supplement T1.107a-1990.

Features
• DS3 payload access in either bit-serial or nibble-parallel mode
• C-bit parity or M13 operating mode
• Separate interface for C-bits
• Detect and generate DS3 AIS, and idle signals
• Transmit reference generator for serial operation
• Transmit and receive FEAC channel under software control
• Transmit single errors: framing, FEBE, C-bit parity, and P-bit parity
• FEBE, C-bit and P-bit performance counters
• Transmit-to-Receive and Receive-to-Transmit loopbacks

Applications
• Subrate multiplexing
• Wideband data or video transport
• DS3 monitor and test
• Channel extenders