Multifunctional circuit module possessing voltage level conversion function and data locking function

The invention discloses a multifunctional circuit module having a voltage level conversion function and a data locking function through switching a plurality of switch components, comprising a first circuit module, a fourth switch module and a fifth switch module, wherein the first circuit module also comprises a first switch module, a second module and a third switch module. The multifunctional circuit module is capable of greatly reducing the area of the circuit layout, for example, the multifunctional circuit module applied to a source driving chip circuit for driving a liquid crystal display can replace the prior voltage level lifting circuit and data locking circuit in the source driving chip circuit to achieve the purpose of reducing the chip areas.