ATS636LSE Programmable Back Biased Hall-Effect Switch with TPOS Functionality Discontinued PrNot forLast T New Designime Buyoduct These parts are in production but have been determined to be These parts are no longer in production These parts are in production but have been determined to be The device should not be LASTpurchased for new design applications. Samples are no longer available.NOT FOR NEW TIME BUY DESIGN This classification indicates that the product is This classification indicates that sale of obsolete and notice has been given. Sale of this device is currently this device is currently restricted to existing customer applications. restricted to existing customer applications. The device should not be purchased for new design applications The device should not be purchased for new design applications because of obsolescence in the because obsolescence in the near future is probable. Samples are no near future. Samples are no longer available.longer available. Date of status change: December 1, 2015Date of status change: February 1, 2006 Date of status change: April 2003 Deadline for receipt of LAST TIME BUY orders: April 28, 2006 Recommended Substitutions: For existing customer transition, and for new customers or new appli- cations, refer to the ATS128. NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, LLC reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no respon- sibility for its use nor for any infringements of patents or other rights of third parties which may result from its use.ATS636LSE Programmable Back Biased Hall-Effect Switch with TPOS Functionality Features and Benefits Description Chopper Stabilization The ATS636LSE programmable, true power-on state (TPOS), Extremely low switchpoint drift over temperature device is optimized Hall-effect IC and rare-earth pellet On-chip Protection combinations that switch in response to magnetic signals Supply transient protection created by ferromagnetic targets in gear-tooth sensing and Output short-circuit protection proximity applications. Reverse-battery protection True Zero-Speed Operation The device is externally programmable. A wide range of True Power-On State programmability is available on the magnetic operate point Single-chip Sensing IC for High Reliability (B ) while the hysteresis remains fixed. This advanced OP Optimized Magnetic Circuit feature allows for optimization of the circuit switchpoint and Wide Operating Voltage Range can drastically reduce the effects of mechanical placement Internal Regulator tolerances found in production environments . A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset Package: 4-pin SIP (suffix SE) voltage, which is normally caused by device overmolding, temperature dependencies, and thermal stress. Having the Hall element and amplifier in a single chip minimizes many problems normally associated with low-level analog signals. This device is ideal for use in gathering speed or position information using gear-tooth-based configurations, or for proximity sensing with ferromagnetic targets. Continued on the next page Not to scale Functional Block Diagram VCC Program / Lock To all Reg subcircuits Programmming Offset Adjust Logic OUT Current AMP S/H LPF Limit Clock/Logic GND 635LSE-DS, Rev. 6