A1174

A1174 Ultrasensitive Hall Effect Latch with Internally or Externally Controlled Sample and Sleep Periods for Track Ball and Scroll Wheel Applications www.datasheet4u.com Features and Benefits ▪ Micro-power latch operation ▪ 1.65 to 3.5 V battery operation ▪ Push-pull output eliminates the need for an external pullup 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 sensor ▫ Toggling the clock pins allows the user to control the sampling and sleep times of the sensor for extreme low power operation ▪ External control of the clock pins allows the user to implement synchronous sampling of multiple sensors in direction detection systems ▪ Chopper stabilization ▫ Superior temperature stability ▫ Extremely low switchpoint drift ▫ Insensitive to physical stress ▪ Solid state reliability ▪ Small size Description The A1174 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. The latched output is idea...