Optimal design for 1:2n demultiplexer using QCA nanotechnology with energy dissipation analysis

Quantum-dot cellular automata (QCA) is an emerging technology to design logic circuits at the nanoscale level. It has the potential to replace the complementary metal oxide semiconductor (CMOS) technology. In this paper, an optimal, single layered, single clocked 1:2 demultiplexer (DeMux) circuit is proposed using 19 QCA cells in QCA technology. Proposed 1:2 DeMux circuit is further utilized for designing of 1:4 DeMux and 1:8 DeMux circuits using 72 and 206 QCA cells respectively. DeMux is an important module at the receiver side in the communication system. The performance of the proposed DeMux circuits are checked and compared with the available similar designs using QCA Designer-E. Proposed 1:2 DeMux decreases 79.17% layout cost and 50% clock latency as compared to the best reported work in the literature. Proposed 1:4 DeMux reduces 48.57% cells count and 40.63% total area while proposed 1:8 DeMux cuts 63.54% cells count and 64.54% total area as compared to best reported similar works in the literature. Energy dissipation pays an important role to design the energy efficient circuits at nanoscale level. Energy dissipations are estimated using QCA Designer-E and QCA Pro tools. Proposed 1:2 DeMux saves 8.20% total energy dissipation as compared to the existing design.