Patent ID: 6285213
Filing Date: 2001-09-04
Classification: H03K

Abstract:
A semiconductor integrated circuit device comprising:a first power supply;a second power supply having a potential less than that of said first power supply;a first switching element capable of connecting said first power supply with a first power supply line;a second switching element capable of connecting said second power supply with a second power supply line;a first voltage drop circuit connected between said first power supply and said first power supply;a second voltage drop circuit connected between said second power supply and said second power supply line;a sequential circuit connected between said first power supply line and said second power supply line, and comprised of a plurality of p-channel MOSFETs and a plurality of n-channel MOSFETs, each of said plurality of p-channel MOSFETs having a substrate terminal connected to said first power supply and each of said plurality of n-channel MOSFETs having a substrate terminal connected to said second power supply;a third power supply having a potential greater than said second power supply; anda level converting means for converting an input signal from said sequential circuit into a signal having a same potential as said third power supply, and for converting the input signal into a signal having a same potential as said second power supply.