STM1404 is a 3V FIPS-140 security supervisor from STMicroelectronics, supports FIPS-140 security level 4, and has four high-impedance physical tamper inputs, overvoltage/undervoltage detector, security alarm (SAL), overtemperature/low temperature detector, optional VREF(1.237V), low power supply current(5.3µA), RoHS compliance and so on.