Family of micro-power Hall-effect switches

30 May 2007 Switches, Relays & Keypads

Micronix has introduced a family of micro-power Hall-effect switches. The new MX887P, MX887D, and MX887U are designed as reed switch replacements for a wide variety of commercial, industrial, and automotive applications.

These micro-power Hall-effect switches feature ultra low offset cancelling amplifiers for sensitive, accurate and stable switch points, immunity to mechanical stress, and solid-state reliability. The on-chip power management circuitry reduces the effective average operating current to 5 μA at 3 V, making it among the lowest power devices in the industry.

The switch output is activated with omnipolar magnetic fields (as little as ±60 gauss), providing excellent sensitivity and enabling the use of low-cost magnets. Three simple digital output interface options are available: the MX887P configured with a CMOS push-pull output, the MX887D with an nMOS open drain pull-down output, and the MX887U with a pMOS open drain pull-up output. They come in 3-lead, TSOT-23 packages.

Applications include use for low cost current sensors in power management circuits.

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