onsemi PMIC - PMIC - Supervisors - MAX809STR MAX809STR

The MAX809STR is a low supply current supervisor circuit designed to monitor supply voltage (V_{CC}) in digital systems and provide a reset signal to the host processor when necessary. It features an active-low RESET output that is triggered within 10 microseconds of V_{CC} falling below the reset voltage threshold. The reset signal remains active for a timeout period, which is factory-trimmed after V_{CC} rises above the threshold. This device operates with a supply current of only 0.5 microamps at 3.2 V, making it suitable for battery-powered applications. The MAX809STR supports precision monitoring for supply voltages ranging from 1.5 V to 5.0 V, with various reset timeout options available (1 ms, 20 ms, 100 ms, and 140 ms). It is optimized for transient immunity and requires no external components, simplifying integration into designs. The device is available in SOT-23 and SC-70 packages and operates over a wide temperature range of -40¬8C to 105¬8C. It is also Pb-free and RoHS compliant, making it a suitable choice for environmentally conscious designs. Typical applications include computers, embedded systems, and critical microprocessor power supply monitoring.