The MAX6581 is a precision multichannel temperature sensor that monitors its own temperature and the temperatures of up to seven external diode-connected transistors. All temperature channels have programmable alert and overtemperature thresholds. The MAX6581 features high accuracy, low power consumption, and a flexible interface.
The MAX6581 is a precision multichannel temperature sensor that monitors its own temperature and up to seven external diode‑connected transistors. It offers programmable alert and over‑temperature thresholds, resistance‑cancellation for all remote channels, and two open‑drain alarm outputs (ALERT and OVERT). The device communicates via a 2‑wire SMBus/I²C‑compatible serial interface.
Typical applications include desktop and notebook computers, workstations, servers, and data‑communication equipment. The datasheet details absolute maximum ratings, electrical characteristics, pin configuration, standby operation, and a typical application circuit, along with package information for the 24‑pin thin QFN package.
| Operating Temperature Range | -40 °C to +125 °C |
|---|---|
| Resolution | 0.125 °C (11‑bit) |
| Accuracy | +1 °C (max) from +60 °C to +100 °C |
| Supply Voltage (Voc) | 3.0 V to 3.6 V |
| Standby Supply Current | ≈4 µA |
| Package | 24‑pin thin QFN (4 mm × 4 mm) with exposed pad |
| Number of Temperature Channels | 8 (1 local + 7 remote) |
| Interface | 2‑wire SMBus/I²C‑compatible |
| Alarm Outputs | Two open‑drain (ALERT, OVERT) |
It uses a 2‑wire SMBus/I²C‑compatible serial interface for reading temperature data and programming thresholds.
The device provides eight temperature channels: one local channel and seven remote diode‑connected channels.
The sensor achieves a maximum accuracy of ±1 °C over the range +60 °C to +100 °C for remote channels.