Power Electronics / Power Management


Radiation hardened power-up reset circuit

28 March 2001 Power Electronics / Power Management

Intersil's new radiation hardened power-up microprocessor reset circuit, the IS-705RH, is the latest edition to the growing family of Star*Power products. It is designed to monitor power supply voltage levels and interface with satellite control units to ensure proper device operation during power-up.

It sends a reset pulse to the microprocessor when the supply reaches a nominal operating voltage of 4,65 V. This prevents code execution errors that occur when signals are present on microprocessor inputs during power-up, ensuring reliable control of satellite functions. Additional features include a watchdog circuit that verifies proper reset has occurred as well as a power-fail circuit for monitoring other supply voltages. Both additional features may be used to generate interrupts.



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