GENERAL DESCRIPTION
The DS2196 T1 dual framer LIU is designed for T1 transmission equipment. The DS2196 combines dual optimized framers together with a LIU. This combination allows the users to extract and insert facility data-link (FDL) messages in the receive and transmit paths, collect line performance data, and perform basic channel conditioning and maintenance.

FEATURES
■ Two full-featured framers and a short/long-haul line interface unit (LIU) in one small package
■ Based on Dallas Semiconductor’s single-chip transceiver (SCT) family
■ Two HDLC controllers with 64-byte buffers that can be used for the FDL or DS0 channels
■ Supports NPRMs and SPRMs as per ANSI T1.403-1998
■ Can be combined with a short/long-haul LIU or a HDSL modem chipset to create a low-cost office repeater/NIU/CSU, or a HDSL1/HDSL2 terminal unit with enhanced monitoring and data link control
■ Supports fractional T1
■ Can convert from D4 to ESF framing and ESF to D4 framing
■ 32-bit or 128-bit crystal-less jitter attenuator
■ Can generate and detect repeating in-band patterns from 1 to 8 bits or 16 bits in length
■ Detects and generates RAI-CI and AIS-CI
■ Generates DS1 idle codes
■ On-chip programmable BERT generator and detector
■ All key signals are routed to pins to support numerous hardware configurations
■ Supports both NRZ and bipolar interfaces
■ Can create errors in the F-bit position and BERT interface data paths
■ 8-bit parallel control port that can be used directly on either multiplexed or nonmultiplexed buses (Intel or Motorola)
■ IEEE 1149.1 JTAG Boundary Scan
■ 3.3V supply with 5V tolerant inputs and outputs
■ 100-pin LQFP (14 mm x 14 mm) package