The MAX6501‑MAX6504 family are micropower temperature switches that assert a logic signal when the die temperature crosses a factory‑programmed threshold. They operate from a +2.7 V to +5.5 V supply, consume about 30 µA, and are offered in eight standard temperature versions ranging from –45 °C to +125 °C.
The devices feature two on‑chip temperature‑dependent voltage references, a comparator, and pin‑selectable hysteresis (2 °C or 10 °C). MAX6501 and MAX6503 provide an active‑low open‑drain output, while MAX6502 and MAX6504 provide an active‑high push‑pull output, suitable for microprocessor reset interfaces or fan‑control logic.
| Supply Voltage (VCC) Range | +2.7 V to +5.5 V |
|---|---|
| Typical Supply Current | 30 µA |
| Temperature Threshold Accuracy | ±0.5 °C (typical) / ±6 °C (max) |
| Hysteresis Selection | 2 °C (HYST to GND) or 10 °C (HYST to VCC) |
| Operating Temperature Range | -55 °C to +135 °C |
| Output Type (MAX6501/MAX6503) | Active‑low open‑drain |
| Output Type (MAX6502/MAX6504) | Active‑high push‑pull |
The MAX6501 operates from a supply voltage of +2.7 V to +5.5 V.
Typical supply current is about 30 µA.
Connect the HYST pin to GND for 2 °C hysteresis or to VCC for 10 °C hysteresis.
The MAX6502 provides an active‑high push‑pull output.