Data Sheet No. PD60032 rev P IR2131(J)(S) & (PbF).
IR2131 - 3 HIGH SIDE AND 3 LOW-SIDE DRIVER
IR2131S - 3 HIGH SIDE AND 3 LOW-SIDE DRIVER
IR2131J - 3 HIGH SIDE AND 3 LOW-SIDE DRIVER
IR2131PbF - 3 HIGH SIDE AND 3 LOW-SIDE DRIVER