What the MAX6833HXRD3 is and where it fits
The Maxim Integrated MAX6833HXRD3 is a simple reset/power-on reset IC that monitors a single voltage rail and asserts a reset signal when the supply drops below a 1.575V threshold. The reset output is active high and uses a push-pull, totem-pole stage — no external pull-up required. It comes in a surface-mount SC-70-3 package (also known as SOT-323). Typical use cases include supervising low-voltage core supplies in MCU, DSP, or FPGA systems where a precise reset is needed during power-up, brownout, or supply transients. The -40°C to 85°C temperature range covers industrial environments like factory automation, telecom base stations, and outdoor instrumentation.
1.575V threshold — what it means for the rail you are monitoring
The 1.575V threshold monitors a single voltage rail. It triggers a reset when the rail dips below that level, with a minimum reset timeout of 140 ms to allow the supply to stabilise before the system starts.
Active-high reset — confirm your system's reset polarity
This part asserts an active-high RESET signal. Many microcontrollers and SoCs expect an active-low reset input. If your processor uses active-low, the MAX6833HXRD3 cannot drive it directly without an inversion stage. Check the reset pin polarity on your target device before committing the BOM line.
Lifecycle and sourcing posture
It is RoHS non-compliant, so verify your assembly house's exemption policy if you still build with lead-bearing solder.