2.2V threshold supervisor for processor power monitoring
The MAX6332UR22D3: With a minimum reset timeout of 100ms, the part holds the system in reset long enough for the core supply to stabilize before the processor starts executing code. This prevents spurious operation during power-up or brownout conditions.
Active production and SOT-23-3 footprint
Housed in the standard SOT-23-3 package (TO-236-3, SC-59 equivalent), the part occupies minimal board area and is compatible with common pick-and-place and reflow processes. The surface-mount footprint is shared across many single-channel supervisors, making layout reuse straightforward.
Temperature range and design-in considerations
The wide range ensures the reset function remains reliable in environments where the PCB sees thermal cycling near the processor's own junction limit. Because the reset output is active high, the supervisor directly drives the processor's reset pin when the monitored voltage falls below the 2.2V threshold. The push-pull stage sources or sinks current without an external resistor, but the designer must verify that the processor's reset input is active-high — a common gotcha when migrating from an active-low supervisor.