High-speed Rapid Single Ux Quantum (rsfq) Batcher-banyan Switching Core

We have carried out a paper feasibility study of the implementation of most common packet switching cores (crossbar, Batcher-banyan, time-division shared bus, and token ring) using the superconductor Rapid Single Flux Quantum (RSFQ) digital technology. According to our estimates, the best performance-to-complexity ratio may be obtained for the Batcher-banyan network. For example, a 128 128 switching core with self-routing (but without address translation, contention resolution, and broadcast features), consisting of about 180; 000 Josephson junctions with the internal clock frequency of 60 GHz could handle a workload of 7:5 Tbps. This core could t on a single 1 cm 1 cm chip and dissipate as low as 45 mW. The estimated parameters are achievable using a simple 1:5-m niobium-trilayer technology.