The MAX6699 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 MAX6699 is specified for an operating temperature range of -40°C to +125°C and is available in 16-pin QSOP and 16-pin TSSOP packages.
The MAX6699 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 for system interrupt or shutdown.
Communication is via a standard 2‑wire SMBus‑compatible interface, supporting write‑byte, read‑byte, send‑byte, and receive‑byte protocols. The device is offered in 16‑pin QSOP and 16‑pin TSSOP packages and operates from a 3.0 V to 5.5 V supply across a –40 °C to +125 °C temperature range.
| Operating Temperature Range | -40 °C to +125 °C |
|---|---|
| Supply Voltage (VCC) | 3.0 V to 5.5 V |
| Standby Supply Current | typical 30 µA (max <15 µA) |
| Number of Temperature Channels | 5 (1 local, 4 remote) |
| Local Temperature Resolution | 1 °C per LSB |
| Remote Diode‑1 Resolution | 0.125 °C per LSB |
| ALERT Output Type | Active‑Low Open‑Drain |
| OVERT Output Type | Active‑Low Open‑Drain |
| Package Options | 16‑pin QSOP, 16‑pin TSSOP |
The MAX6699 provides five channels – one local temperature sensor and four remote diode‑connected channels.
It uses a 2‑wire SMBus‑compatible serial interface for reading temperature data and programming thresholds.
ALERT is an active‑low open‑drain interrupt output that signals when any channel exceeds its programmed alert threshold.
In standby mode the device draws less than 15 µA, with a typical static current of about 30 µA.