You will no longer have to worry about under or overvoltages with this voltage monitor LTC2910IGN voltage monitor IC from Linear Technology. This device has a minimum operating supply voltage of 2.3 V and a maximum of 6.9 V. It has a typical reset threshold voltage of 0.5 V, with a minimum of 0.492 V and a maximum of 0.508 V. This voltage supervisor IC has a minimum operating temperature of -40 °C and a maximum of 85 °C.