FEATURES
• Integrated analog/digital device that interfaces a UTOPIA L2 bus to a serial backplane with optional 1:1 protection using high speed Low Voltage Differential Signal (LVDS) serial links.
• For framers or modems without UTOPIA bus interfaces: optionally provides cell delineation (I.432) across 16 clock and data (bit serial) interfaces.
• Interworks with PM7351 S/UNI-VORTEX devices to implement a point-to-multipoint serial backplane architecture, with optional 1:1 protection of the common card.
• Interfaces to another S/UNI-DUPLEX device (via a single LVDS link) to create a simple point-to-point “UTOPIA bus extension” capability.
• Interfaces to two S/UNI-DUPLEX devices to create a 1:1 protected bus extension.
• Requires no external memory devices.
• Low power 3.3V CMOS technology.
• Standard 5 pin P1149 JTAG port.
• 160 ball PBGA, 15mm x 15mm.
• In the LVDS receive direction: selects traffic from the LVDS link marked active and demultiplexes the individual cell streams to the appropriate PHY device.
• In the LVDS transmit direction: accepts 52-56 byte cell streams from up to 32 UTOPIA L2 compatible PHY devices, multiplexing into a single cell stream carried over two high speed LVDS serial interfaces.
• Cell read/write to both LVDS links available through the processor port. Provides optional hardware assisted CRC32 calculation across cells to support an embedded inter-processor communication channel across the LVDS links.

PHY/FRAMER INTERFACES
One of three modes can be selected:
• 8/16 bit, 33 MHz UTOPIA L2 bus master (also supports expanded length cells).
• 8/16 bit, 52 MHz extended UTOPIA L2 bus slave (compatible with PM7351 S/UNI-VORTEX).
• 16 port, 4 pin clocked serial data interface (Tx & Rx), with integrated I.432 ATM cell delineation.

LVDS INTERFACES
• Dual 4 wire LVDS serial transceivers each operating at up to 200 Mb/s.
• Operates across PCB or backplane traces, or across up to 10 meters of 4 wire twisted pair cabling for inter-shelf communications.
• Fully integrated LVDS clock synthesis and recovery. No external analog components are required.
• Usable bandwidth (excludes system overhead) of 186 Mb/s

APPLICATIONS
• Single shelf or multi-shelf Digital Subscriber Loop Access Multiplexer (DSLAM).
• ATM/frame/IP switch or multiservice access multiplexer.
• UMTS wireless base station and base station controller.