This part is a kind of semiconductor called A1667.

Function of this product has Ring Magnet Sensor IC.

Manufacturers : Allegro

Image and pinout :

Some of the text within the PDF file :

A1667 True Zero-Speed, High Accuracy, Ring Magnet Sensor IC FEATURES AND BENEFITS ▪ Optimized robustness to magnetic offset variation ▪ Small signal lockout for immunity against vibration ▪ Tight duty cycle and timing accuracy over full operating temperature range ▪ True zero-speed operation ▪ Air gap independent switch points ▪ Large operating air gaps achieved through use of gain adjust and offset adjust circuitry ▪ Defined power-on state (POS) ▪ Wide operating voltage range ▪ Digital output representing target profile ▪ Single chip sensing IC for high reliability ▪ Small mechanical size ▪ Fast startup ▪ Undervoltage lockout (UVLO) Packages: 8-Pin SOIC (suffix L) 4-Pin SIP (suffix K) Not to scale DESCRIPTION The A1667 is a true zero-speed ring magnet sensor [ ... ]

A1667 PDF Datasheet Download