This part is a kind of semiconductor called A1242.

Function of this product has Two-Wire Chopper-Stabilized Hall Effect Latch.

Manufacturers : Allegro MicroSystems

Image and pinout :

Some of the text within the PDF file :

www.DataSheet.co.kr A1242 Two-Wire Chopper-Stabilized Hall Effect Latch Discontinued Product This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available. Date of status change: October 31, 2011 Recommended Substitutions: • for the A1242ELHLT-I2-T use the A1244LLHLX-I2-T • for the A1242ELHLT-I1-T use the A1244LLHLX-I1-T • for the A1242LLHLT-I2-T use the A1244LLHLX-I2-T • for the A1242LLHLT-I1-T use the A1244LLHLX-I1-T • for the A1242EUA-I1-T and A1242LUA-I1-T use the A1244LUA-I1-T • for the A1242LUA-I2-T use the A1244LUA-I2-T NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, Inc. reserves the [ ... ]

A1242 PDF Datasheet Download