What the mixed resolution means on the bench
The LM95231BIMM-2 is a digital temperature sensor from TI's TruTherm series that reads both a local die temp and a remote diode junction. The local channel resolves to 9 bits, the remote to 12 bits — so the remote measurement gets finer granularity, which matters when you are tracking a CPU core or GPU die that heats fast and unevenly.
Supply and interface — what connects where
Runs on a single 3V to 3.6V rail and talks over SMBus. That means it shares the bus with other SMBus devices like VRM controllers or SPD EEPROMs — no extra level shifting needed if the rest of the bus is at the same voltage. The part includes One-Shot, programmable resolution, shutdown mode, and standby mode — useful for a system that needs to poll temperature on demand and sleep between reads to save power.
Accuracy and temperature range — where it fits
Accuracy is rated at ±3°C across the 0°C to 85°C test condition.
Package — what the board sees
Surface-mount, so it goes through standard reflow. The 0.65 mm pitch is fine enough that a basic two-layer board can route it, but keep the SMBus lines short and away from switching noise.