Linear Technologys power supply voltage monitors and microprocessor supervisors monitor positive and negative power supplies, with integration of up to eight supply monitors in a tiny package. These devices generate a RESET signal if any power supply goes above or below the user-defined threshold. Reset times are usually fixed at 200ms or are adjustable with just a single capacitor. Aside from power supply monitoring, CPUs and ASICs can also be supervised by an integrated watchdog timer. Portable applications will appreciate the nano-current supervisors, LTC2934 and LTC2935, or the high voltage LTC2960 which can directly monitor voltages up to 36V. These supervisor circuits make up the heart of a complete system monitor and control application.