4000 Series CMOS Logic Family – Texas Instruments CD4051BE, This TI CD4051B analog multiplexer/demultiplexer IC is available in a DIL-16 package. A part of the CMOS 4000 range. The 4051 features a low ON resistance (125Ω) and a high OFF resistance (±100pA leakage current). The 4051 contains 1 x 8 channel mux./demux. Texas Instruments CD4051BE Analogue Multiplexer / Demultiplexer