MAX6646/MAX6647/MAX6649 are precise, two-channel digital temperature sensors.
The MAX6646, MAX6647, and MAX6649 are precise dual‑channel digital temperature sensors that measure both the die temperature and a remote PN‑junction temperature. They communicate via a standard SMBus‑compatible 2‑wire serial interface and provide two alarm outputs (ALERT and OVERT) for over‑temperature protection.
Key features include 0.125 °C resolution, ±1 °C accuracy for remote measurements between +60 °C and +145 °C, programmable conversion rates, low‑power standby mode, and an 8‑pin UMAX package. The devices operate from –55 °C to +125 °C and support a wide range of applications such as graphics processors, servers, workstations, and test equipment.
| Supply Voltage | 3.0 V to 5.5 V |
|---|---|
| Operating Temperature Range | -55 °C to +125 °C |
| Remote Temperature Accuracy | +1 °C max error (+60 °C to +145 °C) |
| Alarm Outputs | Two (ALERT, OVERT) |
| Package | 8‑pin UMAX |
| Standby Supply Current | < 12 µA |
They use an SMBus‑compatible 2‑wire serial interface for reading temperature data and programming alarm thresholds.
The devices provide two alarm outputs: ALERT and OVERT.