What this part is and where it fits
The Analog Devices MAX6656MEE+ is a digital temperature sensor that measures both its own local die temperature and a remote diode-connected transistor. It reports readings over an I²C/SMBus interface with 7-bit resolution, making it a straightforward drop-in for thermal monitoring in systems that already have a two-wire bus. The sensor covers a -55°C to 125°C range on both local and remote channels, which suits equipment that sees wide thermal swings — think outdoor telecom cabinets, industrial motor drives, or avionics bay monitoring where the ambient can go from cold soak to full load heat.
Accuracy — what the ±1.5°C spec means for your measurement
The MAX6656MEE+ is rated at ±1.5°C accuracy in its best case, with a worst-case ±3°C over the full temperature and supply range.
Built-in control features reduce external components
This sensor integrates an output switch, a programmable temperature limit, shutdown mode, and standby mode. The output switch can directly drive a warning LED or a logic-level MOSFET for a fan without needing a separate comparator. The programmable limit lets you set an overtemperature threshold via the I²C bus, and the shutdown/standby modes drop power consumption when the system is idle. For a panel-builder or OEM integrator, these features mean fewer passives and less board area for the thermal management loop.
Package and mounting — 16-QSOP surface-mount footprint
The MAX6656MEE+ comes in a 16-pin QSOP package (3.90 mm body width, 0.154" pitch), surface-mount only.
Lifecycle and compliance — active production, ROHS3
It is also ROHS3 compliant, so it meets the latest EU restriction on hazardous substances. For a BOM freeze or a long-life design, this part does not carry an imminent obsolescence risk.