The present invention provides a battery protection integrated circuit and a circuit characteristic setting method. The consumption current and the chip size can be suppressed from increasing. The battery protection IC protects the secondary battery by controlling charging and discharging of the secondary battery when at least one of overcharge, overdischarge, and overcurrent is detected for the secondary battery. The battery protection integrated circuit includes a storage section that stores characteristic data for setting circuit characteristics of the battery protection integrated circuit and characteristic adjustment data for adjusting an individual difference of the circuit characteristic of the battery protection integrated circuit, wherein the storage unit has at least two of the bits of the two data for mutually storing one bit of a non-volatile pair of memory cells and a group of volatile memory circuits connected to an output of said pair of memory cells by cross-coupling; a memory circuit statically outputs data of the two data quantities stored in the storage unit as the voltage rises at the time of power-on of the battery protection integrated circuit.