Patent ID: 6560157
Filing Date: 2003-05-06
Classification: G11C

Abstract:
A semiconductor device comprising:an internal circuit which is arranged on a chip and is operated at any of a first dropped voltage and a second dropped voltage; a main voltage dropping circuit, arranged on the chip, for dropping a first input voltage to the first dropped voltage and outputting the first dropped voltage to the internal circuit; a secondary voltage dropping circuit, arranged on the chip and having a current supplying capability and an electric power consumption rate smaller than those of the main voltage dropping circuit, for dropping the first input voltage or second input voltage to the second dropped voltage and outputting the second dropped voltage to the internal circuit; a first power supply terminal which is arranged on the chip so as to allow connection with a first external voltage source having the first input voltage and is connected with the main voltage dropping circuit; and a second power supply terminal which is arranged on the chip so as to allow connection with either the first external voltage source or a second external voltage source having the second input voltage and is connected with the secondary voltage dropping circuit.