A novel implementation of a demultiplexer in positive feedback source-coupled logic (PFSCL) style is presented in this paper. Two methods to realize PFSCL demultiplexer are described. The first one represents uses the conventional NOR based approach while the fundamental cell based approach is applied in the second one. The functionality of the proposed demultiplexer based on the two approaches is validated through using TSMC 180 nm MOS parameters. A comparison in the performance of the PFSCL demultiplexers is also performed in terms of various parameters. It is found that the fundamental cell based demultiplexer is better than the NOR based PFSCL demultiplexer.