MAX6312EUK46D3+ [Analog Devices]

These devices are CMOS microprocessor supervisory circuits designed to monitor multiple power supplies, ideal for 5V and 3.3V systems in personal computers. They assert a system reset if any monitored supply falls outside the programmed threshold. Features include low supply current (8µA typical), small SOT23-5 package, factory-programmed reset thresholds from 2.5V to 5V in 0.1V increments, immunity to short VCC transients, guaranteed reset valid down to VCC=1V, four power-on reset timeout periods (1ms, 20ms, 140ms, 1120ms), no external components required, manual reset input, and under/overvoltage supply monitoring.