MAX6642 is a precision dual-channel digital temperature sensor from TI that accurately measures the temperature of its own die and a remote PN junction and reports the temperature data over a 2-wire serial interface
The MAX6642 is a precise two‑channel digital temperature sensor that measures its own die temperature and a remote PN‑junction temperature, reporting data over a standard SMBus‑compatible 2‑wire interface. It supports both continuous and single‑shot conversion modes and includes an SMBus timeout for reliability.
The device operates from –40 °C to +125 °C, measures remote temperatures up to +150 °C, and offers programmable over‑temperature thresholds with an ALERT output. It is supplied in a 6‑pin TDFN package with an exposed pad and features low‑power standby mode (≤10 µA).
| Temperature resolution | 0.25 °C per LSB |
|---|---|
| Remote temperature accuracy | +1 °C max error (60 °C‑100 °C) |
| Operating temperature range | –40 °C to +125 °C |
| Remote temperature measurement range | 0 °C to +150 °C |
| Supply voltage | 3.0 V to 5.5 V |
| Standby supply current | < 10 µA |
| Conversion rate | 8 Hz |
| Package | 6‑pin TDFN with exposed pad |
It uses a standard SMBus‑compatible 2‑wire serial interface for reading temperature data and programming alarm thresholds.
The ALERT output asserts when the local or remote temperature exceeds the programmed over‑temperature thresholds.
In standby mode the supply current drops to less than 10 µA.
The extended register provides a resolution of 0.25 °C per LSB.