1.58V threshold supervisor for extended-temperature designs
The MAX6383XR16D7+T is a simple reset/power-on reset IC from Analog Devices (formerly Maxim Integrated) that monitors a single supply rail and asserts a reset signal when the voltage drops below 1.58V. This threshold is factory-trimmed for tight accuracy, making it suitable for monitoring 1.8V or 1.6V nominal rails in processors, FPGAs, or ASICs that require a precise undervoltage lockout. The active-low, open-drain output holds the reset line low for a minimum of 1.2s after the supply recovers, giving slow-start power supplies or heavily decoupled rails time to stabilize before the system restarts.
Temperature range and package — where it fits
Rated for -40°C to 125°C ambient, this part spans the full industrial and automotive under-hood temperature envelope. The SC-70-3 package (also known as SOT-323) occupies about half the board area of a standard SOT-23, which matters on dense mixed-signal or multi-rail boards where every mm² is budgeted. The three-pin footprint — VCC, GND, and the open-drain RST output — keeps routing simple; the open-drain output lets you pull up to any voltage up to the absolute maximum of the pin, matching the downstream logic family.
Lifecycle and sourcing reality
The MAX6383XR16D7+T carries an Active lifecycle status per the manufacturer, with ROHS3 compliance. This is a current-production part — no end-of-life notice, no last-time-buy window. For BOM lines that need a qualified supervisor IC for new designs, this part is specified into production without obsolescence risk.
What the ratings mean for fit
The 1.58V threshold triggers reset when the monitored rail falls to 1.58V. The 1.2s minimum reset timeout is longer than the typical 140ms–280ms found on many supervisor ICs.