The MAX9621 is a dual-wire Hall-effect sensor interface with analog and digital outputs that can interface two 2-wire Hall-effect sensors to low-voltage microprocessors (FP) through a digital output for Hall-effect switches or an analog output for linear information or both.
The MAX9621 is a dual‑channel Hall‑effect sensor interface that can provide either digital switch outputs or an analog voltage proportional to sensor current. It operates from a 5.5 V to 18 V supply, protects the sensors from transients up to 60 V, and includes a 50 µs blanking period after power‑up or restart. The device is offered in a 3 mm × 5 mm, 10‑pin UMAX package and is rated for –40 °C to +125 °C operation.
Typical applications include window lifters, seat movers, electric sunroofs, seat‑belt buckles, door power locks, ignition keys, steering column sensors, and speed sensing. The datasheet provides absolute maximum ratings, DC electrical characteristics, AC timing specifications, pin configuration, and package drawings.
| Operating Voltage Range | 5.5 V to 18 V |
|---|---|
| Supply Transient Protection | Up to 60 V |
| Operating Temperature Range | -40 °C to +125 °C |
| Package Type | 3 mm × 5 mm, 10‑pin UMAX |
| Blanking Time After Power‑Up | Minimum 50 µs |
The MAX9621 operates from 5.5 V up to 18 V.
It protects Hall sensors from transients up to 60 V and shuts off sensor current if the supply exceeds 18 V.
The device provides a minimum blanking time of 50 µs following power‑up or restart.
It is available in a 3 mm × 5 mm, 10‑pin UMAX package.