Allegro a110x series continuous time hall effect unipolar switches 38 to 24v allegro a1101eua t the a1101eua t is a hall effect switch in a 3 pin sip package that is capable of continuous time operation and features fast power on time and low noise operation the device is factory programmed at end of line for optimum performance an integrated voltage regulator allows a wide operating voltage range and the switch has stable operation over the full operating temperature range for extensi