MAX6681MEE+

MAX6681MEE+ is a ±1°C fail-safe remote/local temperature sensor with an SMBus interface. It is a precise, two-channel digital thermometer. It accurately measures the temperature of its own die and one remote PN junction and reports the temperature on a 2-wire serial interface. The remote junction can be a diode-connected transistor like the low-cost NPN type 2N3904 or PNP type 2N3906. The remote junction can also be a common-collector PNP, such as a substrate PNP of a microprocessor. It includes pin-programmable default temperature thresholds for the active-low OVERT output, which provides fail-safe clock throttling or system shutdown. In addition, the device is pin programmable to select whether the active-low OVERT output responds to either the local, remote, or both temperatures. Applications include desktop computers, notebook, computers, servers, thin clients, and workstations.

• Pin-programmable threshold for active-low OVERT limit
• Programmable under/overtemperature active-low ALERT limit
• Dual channel: measures remote and local temperature
• 11-bit, 0.125°C resolution for remote temperature measurements
• High accuracy ±1°C (max) from +60°C to +100°C (remote)
• No calibration required, SMBus/I2C™-compatible interface
• SMBus timeout prevents SMBus lockup
• Supply voltage range from 3.0 to 5.5V
• 16 QSOP package
• Temperature range from -55°C to +125°C