The MAX6636 precision multichannel temperature sensor monitors its own temperature and the temperatures of up to six external diode-connected transistors. All temperature channels have programmable alert thresholds. Channels 1, 4, 5, and 6 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 MAX6636 is specified for a -40°C to +125°C operating temperature range and is available in a 20-pin TSSOP package.
The MAX6636 precision multichannel temperature sensor monitors its own temperature and up to six external diode‑connected transistors. It provides programmable alert thresholds for each channel and over‑temperature thresholds for channels 1, 4, 5, and 6, with two open‑drain outputs (ALERT and OVERT) for interrupt or shutdown functions.
Communication is via a standard 2‑wire SMBus interface, and the device operates from 3.0 V to 5.5 V. It is supplied in a 20‑pin TSSOP package and supports both software and hardware standby modes to reduce power consumption.
| Operating Temperature Range | -40 °C to +125 °C |
|---|---|
| Package | 20‑pin TSSOP |
| Number of Temperature Channels | 7 (1 local + 6 remote) |
| Supply Voltage (VCC) | 3.0 V to 5.5 V |
| Remote Diode‑1 Temperature Resolution | 0.125 °C (11‑bit) |
| Other Channels Temperature Resolution | 1 °C (8‑bit) |
The device is specified for operation from –40 °C to +125 °C.
It provides seven temperature channels: one local sensor and six remote diode‑connected channels.
The MAX6636 uses a standard 2‑wire SMBus (I²C‑compatible) interface for reading data and programming thresholds.
ALERT is an open‑drain interrupt output, while OVERT is an open‑drain over‑temperature output that can drive a fan, shutdown circuit, or other thermal‑management hardware.