Voltage supervisor for a single rail
The MAX6834GXRD1+: The open-drain, active-low output means the reset line is pulled low during power-up, brown-out, or when the monitored voltage dips below 1.665V, and releases to high-impedance after the timeout — a standard interface for most MCU reset pins.
Threshold, timeout, and temperature range
The 1.665V threshold is factory-trimmed for a specific low-voltage rail — typically a 1.8V supply with a -7.5% tolerance window — so the supervisor asserts reset before the downstream logic enters an undefined state. The 1ms minimum reset timeout gives the power rail and oscillator time to settle before the processor starts executing code, preventing spurious boot-up from a still-ramping supply.
SC-70-3 package and board layout
Housed in a 3-lead SC-70 (SOT-323) package, the footprint occupies roughly 2.0 × 2.1 mm — small enough to fit near the monitored rail's output cap without routing long sense traces. Surface-mount assembly with the SC-70-3 body; the open-drain output requires an external pull-up resistor to the MCU's supply rail — typically 10 kΩ to 100 kΩ depending on noise immunity needs.
The + suffix in the order code indicates lead-free, RoHS-compliant packaging — a standard marking for ADI's green products.