A1242

The A1242 Hall effect latch is a two-wire latch especially suited for operation  over extended temperature ranges, from 40 to +150°C.  Superior high-tempera- ture performance is made possible through the Allegro® patented dynamic offset  cancellation technique, A1242 reduces the residual offset voltage normally caused  by device overmolding, temperature dependencies, and thermal stress.

The current-switching output technique of A1242 allows for the reduction in cost in the  wiring harness because only two connections to the sensor are required.  The cur- rent-switching output structure of A1242 also inherently provides more immunity against  EMC/ESD transients.  These sensors have low magnetic thresholds, thereby  enabling more flexibility in the magnetic circuit design.