BUY AH477AZ4-CG1 https://www.utsource.net/itm/p/9513661.html
IC HALL EFFECT
Description: AH477AZ4-CG1 is a 4-pin SIP (Single In-line Package) BCD (Binary Coded Decimal) integrated circuit. Features: Low power consumption High speed operation Low voltage operation High reliability High noise immunity Applications: Digital clocks Digital watches Digital thermometers Digital voltmeters Digital counters Digital displays Digital control systems (For reference only)