VSC880

The VSC880 is a 16x16 serial crosspoint switch with serial data rates at 2.125Gb/s. The VSC880 has been designed to operate with the VSC870 backplane transceiver to establish a synchronous high performance switching system with an aggregate bandwidth of 32Gb/s. The switch chip transmits the master word clock (62.5Mb/s), and master cell clock (if used) to all port cards through the serial data channels. The transceivers automatically perform bit alignment, word alignment and cell alignment to the switch chip. The transceiver and switch chip have been optimized for both self-routing and cell-based systems and include special commands for connection requests  selfrouting) and cell synchronous operation (cell based). In addition, a parallel CPU interface can be used to control internal modes and read status information from the switch. A 20-bit interface can also be used to program the  witch matrix in 4 clock cycles. The switch chip runs off of a 3.3V/2.5V or 3.3V/2.0V power supplies. The serial I/O buffers contain on-chip termination resistors (see Application Note 34).