The Maxim Integrated MAX6443‑MAX6452 µP reset circuits provide low‑current supervision with single or dual manual reset inputs and extended setup periods.
The MAX6443‑MAX6452 family are low‑current microprocessor supervisor circuits that monitor supply voltages and assert an active‑low RESET output when a voltage drops below a factory‑set threshold. They feature single or dual manual reset inputs with an extended setup period to avoid nuisance resets, and optional immediate‑reset inputs for fast response.
These devices are offered in small SOT‑143, SOT‑23 packages, operate from –40 °C to +85 °C, and are qualified for automotive (AEC‑Q100) and RoHS‑compliant options. Applications include set‑top boxes, consumer electronics, automotive, industrial equipment, and medical devices. Ordering information, package outlines, and pin configurations are provided in the later sections.
| Operating Voltage Range (VCC) | 1.0‑5.5 V |
|---|---|
| Reset Timeout Period | 140 ms min (210 ms typ) |
| Manual Reset Minimum Setup Period (tMRK) | 6.72 s |
| Operating Temperature Range | -40 °C to +85 °C |
The reset timeout period is 140 ms minimum (typical 210 ms).
The MAX6445 has two extended manual reset inputs (MR1 and MR2).
They are guaranteed over –40 °C to +85 °C.