VSC3312

The VSC3312 has the following features including 6.5 Gbps non-return-to-zero (NRZ) data bandwidth;Fully non-blocking and multicasting switch core with per-pin signal inversion capability;Multiple time-constant programmable input and output equalization;Wide equalization adjustment range;Fully asynchronous operation with <1 ns latency;Reconfigurable Input/Output (I/O) capability;LOS detection and forwarding.

The VSC3312 is a 12-port 6.5 Gbps asynchronous switch with advanced signal equalization designed for high-speed serial backplanes and cable interconnect applications. VSC3312 switches allow multicast, loopback, and reconfigurable Input/Output(I/O) capability, allowing for great flexibility in allocating and routing signals in a broad range of applications. The VSC3312 includes dual time-constant equalization, which significantly reduces jitter associated with driving multigigabit signals across backplanes and cables. Using a fully asynchronous architecture allows any data rate or protocol on any channel without the need for an external reference clock. This gives the VSC3312 wire-like interoperability in virtually any application that uses binary signaling.The VSC3312 can also be used as a buffer that simplifies and enhances the design of high-speed signal paths by providing signal equalization at both inputs and outputs to reduce or reverse signal degradation due to transmission line effects.

The VSC3312 has a total of 24 ports. Eight are dedicated inputs, eight are dedicated outputs, and the remaining eight may be configured as either inputs or outputs without restriction. This design provides the flexibility of using the device as a standard 12x12 crosspoint, or any ratio from 8x16 to 16x8. This unique feature allows full I/O utilization in any application that has less than a 2:1 ratio between inputs and outputs. In many cases, this translates to a significant reduction in chip count.The VSC3312 has a LOS detector with programmable thresholds on every input port. The LOS status can be made to appear at either of two status pins for external use. The LOS signal can also be switched to each of the outputs in concert with the high-speed switching core. LOS forwarding can be enabled for each of the outputs, which will cause the outputs to be squelched in response to a LOS detect at the corresponding input, thereby propagating signal envelopes through the switch.