High voltage switch circuit and semiconductor memory device having the same

Abstract

A high voltage switch circuit and a semiconductor memory device having the same are provided. The high voltage switch circuit includes a switching circuit for outputting a high voltage by transmitting one of a plurality of pump voltages to an output node; and a discharge circuit connected between the output node and a terminal of an internal power voltage, the discharge circuit discharging the high voltage to a level of the internal power voltage. The discharge circuit includes a triple well transistor.

What is claimed is: 
     
         1 . A high voltage switch circuit comprising:
 a switching circuit configured to output a high voltage by transmitting one of a plurality of pump voltages to an output node; and   a discharge circuit connected between the output node and a terminal of an internal power voltage, and configured to discharge the high voltage to a level of the internal power voltage,   wherein the discharge circuit includes a triple well transistor.   
     
     
         2 . The high voltage switch circuit of  claim 1 , wherein the output node is connected to a drain of the triple well transistor, and the internal power voltage is applied to a source and a p-well of the triple well transistor. 
     
     
         3 . The high voltage switch circuit of  claim 2 , wherein the internal power voltage is applied to an n-well surrounding the p-well.