What this reset IC does and where it fits
The Maxim Integrated MAX6458UKD0C+T is a Simple Reset/Power-On Reset IC that monitors a single supply voltage and asserts a reset signal when the voltage drops below a user-adjustable threshold. The active-low, open-drain output can be pulled up to any voltage independent of the monitored rail, making it suitable for mixed-voltage systems. With a typical reset timeout of 50 µs, the part recovers quickly once the supply returns above threshold. The SOT-23-5 package fits compact PCB layouts in industrial controls, automotive ECUs, and portable equipment where reliable power-on reset is required.
Threshold adjustability — why it matters for your rail
The threshold is adjustable/selectable via external resistors, so the same part can be configured for any supply level within the device's operating range. The open-drain output allows the reset signal to be pulled up to the logic voltage of the downstream microcontroller or FPGA, even if that differs from the monitored supply.
Temperature grade and deployment environment
Rated for -40°C to 125°C ambient, this part covers the full industrial temperature span and extends into automotive under-hood and engine-bay environments. The SOT-23-5 package is a standard footprint shared by many reset ICs, simplifying board layout and second-sourcing.
Lifecycle and sourcing posture
The MAX6458UKD0C+T carries an Active lifecycle status with ROHS3 compliance. There is no last-time-buy or obsolescence risk for this order code.