often provide more realistic transmission gate (TG) behavior compared to basic "box" models. Supply Voltage:
The CD4051 is unique because it supports a wide voltage range (3V to 20V) and dual supplies (e.g., $\pm$5V or $\pm$10V). Ensure your SPICE model supports the cap V sub cap E cap E end-sub rail if you are switching signals that swing below ground. On-Resistance ( cap R sub cap O cap N end-sub cap R sub cap O cap N end-sub cd4051 spice model link
: Ensure your simulation respects the supply range ( 20V20 cap V ). If you ground pin 7 ( VEEcap V sub cap E cap E end-sub ), all control signals must stay within the VDDcap V sub cap D cap D end-sub VSScap V sub cap S cap S end-sub often provide more realistic transmission gate (TG) behavior