Temperature monitoring with SMBus readout
Built-in features include an output switch for overtemperature alerts, a programmable limit register that sets the trip threshold, a shutdown mode to minimize quiescent current when not sampling, and a standby mode that keeps the SMBus alive while halting conversions. These make the part suitable for thermal management in server racks, telecom line cards, industrial controllers, and power-supply monitoring where a single IC needs to watch both the local ambient and a hot component like a CPU or MOSFET.
Accuracy and temperature range — what to expect
Over the calibrated test window of 60°C to 100°C, the MAX6622UE9A+ holds local accuracy to -4.4°C / -0.4°C and remote accuracy to -6.1°C / -0.1°C. Outside that band, from 0°C to 125°C, the error widens but stays within the datasheet limits. For a fan-speed control loop or an overtemperature shutdown threshold, the -0.4°C typical offset on the local channel means you can set the limit register a degree or two below the absolute max of the monitored device and still have headroom. The remote channel's wider tolerance is worth factoring into the guard band if the external diode is a distant junction with noise pickup. The full operating temperature range of -40°C to 125°C covers industrial enclosures, outdoor telecom cabinets, and automotive cabin-adjacent electronics. Storage temperature is not separately stated but the operating range already exceeds most handling requirements.
Package and mounting — 16-TSSOP on a 0.173" body
Housed in a 16-TSSOP package with a 4.40 mm width and 0.173" body length, the MAX6622UE9A+ is a surface-mount part that reflows on standard lead-free profiles. The tube shipping means the parts arrive aligned in a stick; plan for tube feeders or hand-place for prototype runs.
Lifecycle and compliance — active and RoHS3
The MAX6622UE9A+ carries an active lifecycle status with ROHS3 compliance. The ROHS3 declaration covers the full substance restriction list, which simplifies EU-market and green-procurement approvals.