What is the MAX9621AUB+ and where does it fit?
The MAX9621AUB+ is a Hall Effect Sensor from Analog Devices that outputs both an analog and a digital signal from a logic-level input. The dual-output architecture lets one device feed an ADC for proportional measurement and a GPIO for threshold detection — useful in position, speed, or current-sense circuits where you need both a raw field reading and a clean switch point. Supply current is 1 mA, which keeps the thermal budget low in a 10-uMAX/uSOP package. The 1 mA draw also makes the part viable for loop-powered or battery-operated sensor modules where every microamp is budgeted. The operating temperature range spans -40°C to 125°C, covering industrial, automotive under-hood, and outdoor telecom enclosures without a grade bump.
If your application sees sustained 125°C ambient — near an engine block or exhaust path — this part holds its calibration without derating the supply current. At 1 mA supply, the MAX9621AUB+ draws less than many discrete Hall switches that pull 4–10 mA. For a 24 VDC industrial sensor head with a 3.3 V regulator, that 1 mA is a rounding error on the regulator quiescent current; for a coin-cell-powered module, it's the dominant load and must be duty-cycled.
Package and footprint — layout reality check
The MAX9621AUB+ is supplied in a 10-TFSOP or 10-MSOP package with a 0.118-inch (3.00 mm) body width. The 10-uMAX/uSOP footprint is a standard 0.50 mm pitch — a two-layer board can route the ten pins, but the analog output trace should be kept short and away from the digital output trace to avoid coupling noise back into the Hall plate. Mounting is surface-mount; the part ships in a Tube.
Lifecycle and compliance — no obsolescence worry
ROHS3 compliance is confirmed, so the part ships without any of the six restricted substances plus the four phthalates. No exemption expiry to track.
Sourcing — how to proceed
Because the MAX9621AUB+ is Active and ROHS3 compliant, there is no supply-chain urgency. Sourced to order against your BOM quantity; current pricing and lead time are confirmed at quote time. The 10-uMAX/uSOP package is a standard Analog Devices footprint, so the part is widely inventoried across the distribution network.