The HEX473 is a low‑power, full‑polarity CMOS Hall effect switch with an internal clock for wake‑up and sleep modes.
The HEX473 Hall switch integrates a mixed‑signal CMOS Hall sensor with a built‑in clock generator that periodically wakes the device to sample the magnetic field and returns to a low‑power sleep state when idle. This architecture provides accurate magnetic switching points while minimizing current consumption, making it suitable for battery‑powered applications.
The device is supplied in a TSOT‑23 package (also available in TO‑92) with detailed pin definitions, absolute maximum ratings, electrical and magnetic characteristics, and ESD protection guidelines. Typical specifications include a supply voltage range of 1.65 V to 5.5 V, wake‑up time of 33 ms, and magnetic switching thresholds around ±45 Gauss. This manual is written in Chinese.
| Supply Voltage (Vopp) range | 1.65 V min – 5.5 V max (typical 3 V) |
|---|---|
| Supply Current (average) | 5 µA (typical) |
| Output Current (lour) | 1.0 mA (typical) |
| Saturation Voltage at 1 mA | 0.3 V |
| Sleep time (TsL) | 30 ms (typical, 60 ms max) |
| Magnetic Switching Threshold (Bop) | ±45 Gauss (typical, ±60 G max) |
| Release Threshold (BRp) | ±15 Gauss (typical, ±30 G max) |
The HEX473 operates from 1.65 V up to 5.5 V, with a typical value of 3 V.
The switch turns on when the magnetic flux density exceeds about ±45 Gauss (Bop) and turns off when it falls below about ±15 Gauss (BRp).