POWER-ON RESET CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE INCLUDING THE SAME, ESPECIALLY OBTAINING ENOUGH INITIALIZATION PERIOD

摘要

PURPOSE: A power-on reset circuit and a semiconductor integrated circuit device including the same are provided which can assure an initialization operation of a memory device at a low power supply voltage. CONSTITUTION: An internal circuit(150) includes at least one latch. And a power-on reset circuit(200) generates a power-on reset signal to reset the latch during power-on. The transition of the power-on reset signal of the power-on reset circuit is done after a constant time since a power supply voltage reaches a detection voltage during the power-on. The detection voltage is higher than a threshold voltage of a MOS transistor and lower than the power supply voltage.