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A1174 Datasheet Ultrasensitive Hall Effect Latch

Manufacturer: Allegro MicroSystems

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General Description

TheA1174 is a micro-power, Hall-effect latch for use in portable devices that employ rotational detection systems, and have a power supply voltage between 1.65 and 3.5 V.

The device has a single push-pull output structure and requires no external pull-up resistor for reliable operation.

When a sufficient positive magnetic field is present on the device, the device output transitions to the low state and is latched in this state until a negative field of sufficient strength latches the device output into the high state.

Overview

A1174 Ultrasensitive Hall Effect Latch with Internally or Externally Controlled Sample and Sleep Periods for Track Ball and Scroll Wheel.

Key Features

  • Micro-power latch operation.
  • 1.65 to 3.5 V battery operation.
  • Push-pull output eliminates the need for an external pull- up resistor.
  • User configured, internally or externally controlled sample and sleep periods ▫ Floating the two clock pins results in the use of a fixed sampling clock internal to the device ▫ Toggling the clock pins allows the user to control the sampling and sleep times of the device for extreme low power operation.
  • External control of the clock pins.

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