What this supervisor does and where it fits
The Maxim Integrated DS1233Z-15+ is a single-channel simple reset/power-on reset supervisor from the EconoReset series. It monitors a single voltage rail with a threshold of 4.125V and asserts an active-low, open-drain reset output when the supply drops below that level. The reset output remains asserted for a minimum of 250ms after the supply returns above the threshold, giving the system time to stabilize. This part is specified over the industrial temperature range of -40°C to 85°C, making it suitable for motor drives, outdoor telecom gear, factory automation, and other environments where the board sees temperature swings but not extended cold or hot extremes.
Package and mounting — SOT-223-3 footprint
The DS1233Z-15+ comes in a surface-mount SOT-223-3 package (also referenced as TO-261-4, TO-261AA). This is a three-lead package with a large tab that can be soldered to a PCB pad for heat dissipation, though the part's power dissipation is low. The SOT-223-3 footprint is common and easy to route; no special layout considerations beyond standard decoupling are needed.
Lifecycle and sourcing reality
The DS1233Z-15+ is listed as Active in production with ROHS3 compliance. There is no end-of-life notice or last-time-buy window to track. For a BOM line that needs a simple 4.125V supervisor in an SOT-223-3 package, this part is a straightforward choice with no supply risk from obsolescence.