The MAX6715–MAX6729 are ultra-low-voltage microprocessor (µP) supervisory circuits designed to monitor two or three system power-supply voltages. These devices assert a system reset if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly improve system reliability and reduce size compared to separate ICs or discrete components. These devices monitor primary supply voltages (VCC1) from 1.8V to 5.0V and secondary supply voltages (VCC2) from 0.9V to 3.3V with factory-trimmed reset threshold voltage options (see Reset Voltage Threshold Suffix Guide). An externally adjustable RSTIN input option allows customers to monitor a third supply voltage down to 0.62V. These devices are guaranteed to be in the correct reset output logic state when either VCC1 or VCC2 remains greater than 0.8V. A variety of push-pull or open-drain reset outputs along with watchdog input, manual reset input, and power-fail input/output features are available (see Selector Guide). Select reset timeout periods from 1.1ms to 1120ms (min) (see Reset Timeout Period Suffix Guide). The MAX6715–MAX6729 are available in small 5, 6, and 8-pin SOT23 packages and operate over the -40°C to +85°C temperature range.
The MAX6715‑MAX6729 family are ultra‑low‑voltage supervisory circuits that monitor two or three supply voltages and assert a reset when any voltage falls below a factory‑trimmed or adjustable threshold. They are offered in 5‑pin, 6‑pin and 8‑pin SOT‑23 packages and operate from –40 °C to +85 °C.
Key features include selectable reset‑timeout periods from 1.14 ms to 1120 ms, low supply current (typical 14 µA at 3.6 V), multiple reset‑output configurations (push‑pull or open‑drain), watchdog, manual reset and power‑fail inputs, and a wide supply‑voltage range of 0.8 V to 5.5 V.
| Supply Voltage Range (Vcc1/Vcc2) | 0.8 V to 5.5 V |
|---|---|
| Reset Timeout Period | 1.14 ms to 1120 ms |
| Package Options | 5‑pin, 6‑pin, 8‑pin SOT‑23 |
| Typical Supply Current | 14 µA at 3.6 V |
They monitor supply voltages from 0.8 V up to 5.5 V.
The devices are offered in 5‑pin, 6‑pin and 8‑pin SOT‑23 packages.
Reset timeout periods can be selected from 1.14 ms to 1120 ms.
Typical supply current is 14 µA at a 3.6 V supply.