The MAX6694 precision multichannel temperature sensor monitors its own temperature and the temperatures of up to four external diode-connected transistors. All temperature channels have programmable alert thresholds. Channels 1 and 4 also have programmable overtemperature thresholds. When the measured temperature of a channel exceeds the respective threshold, a status bit is set in one of the status registers. Two open-drain outputs, OVERT and ALERT, assert corresponding to these bits in the status register. The 2-wire serial interface supports the standard system management bus (SMBus™) protocols: write byte, read byte, send byte, and receive byte for reading the temperature data and programming the alarm thresholds. The MAX6694 is specified for a -40°C to +125°C operating temperature range and is available in 16-pin TSSOP and 5mm x 5mm thin QFN packages.
The MAX6694 is a precision multichannel temperature monitor that measures its own temperature and up to four external diode‑connected transistors. It provides programmable alert thresholds for each channel and over‑temperature thresholds for channels 1 and 4, with open‑drain ALERT and OVERT outputs.
Key features include a 2‑wire SMBus‑compatible serial interface, hardware and software standby modes, low standby current (3‑10 µA), and availability in 16‑pin TSSOP and 5 mm × 5 mm thin QFN packages. The device operates from –40 °C to +125 °C and offers beta compensation on channel 1.
| Operating Temperature Range | -40 °C to +125 °C |
|---|---|
| Supply Voltage (VCC) | 3.0 V to 3.6 V |
It uses a 2‑wire serial interface that is compatible with the standard System Management Bus (SMBus) protocols.
Hardware standby is entered by pulling the STBY pin low, while software standby is entered by setting the STOP bit in the configuration register.
Both ALERT and OVERT are open‑drain active‑low outputs that assert when their respective temperature thresholds are exceeded.