DESCRIPTION
The PM5371 TUDX SONET/SDH Tributary Unit Cross-Connect is a monolithic integrated circuit that allows non-blocking switching of tributaries within two SONET STS-3 or SDH STM-1 streams. Any tributary entering on either stream can be connected to any same size tributary within either outgoing stream. The TUDX can be programmed to cross-connect a mix of SONET VT1.5, VT2, VT3, VT6, or STS-1 channels or SDH TU11, TU12, TU2, or TU3 channels. Programmable idle code can also be inserted into any of these channels. The TUDX allows cross-connection of up to 168 VT1.5 or TU11 streams, up to 126 VT2 or TU12 streams, or up to 42 VT6 or TU2 streams or any legal mix as permitted by the SONET or SDH mappings.

FEATURES
• A single stage, non-blocking array of time switches for cross-connecting
   SONET virtual tributaries (VTs) or SDH tributary units (TUs).
• Provides non-blocking switching between two STS-3 (STM-1) byte serial input
   streams and two STS-3 (STM-1) byte serial output streams.
• Operates from a single 19.44 MHz clock.
• Provides parity checking on input data buses and parity generation on output
   data buses.
• Allows programmable idle code insertion on a per VT or per TU basis.
• Permits switching of any combination of SONET VT1.5, VT2, VT3, VT6, or
   STS-1 channels. Permits switching of any combination of SDH TU11, TU12,
   TU2, or TU3 channels.
• Operates in conjunction with the PM5361 TUDX SONET/SDH Tributary Unit
   Payload Processor which aligns SONET VTs or SDH TUs such that they can
   be switched by the TUDX.
• Cascadable in a systolic or bused manner to allow larger switching arrays to
   be implemented. Provides control outputs that are programmable on a per
   timeslot basis to facilitate construction of larger switching arrays.
• Provides programmable delay to match data skew in the systolic array
   application.
• Provides a generic 8-bit microprocessor bus interface for configuration,
   control, and status monitoring.
• Low power, +5 Volt, CMOS technology. Device has TTL compatible inputs
   and outputs.
• 160 pin metric quad flat pack (MQFP) package.

APPLICATIONS
• SONET and SDH Wideband Cross-Connects
• SONET and SDH Add-Drop and Terminal Multiplexers