ATS19420: High-Accuracy Hall-Effect Transmission Speed Gear Tooth Sensor IC

SN Package Image


Top Features

The ATS19420 is an advanced Hall-effect integrated circuit (IC) that uses a fully integrated back-biased magnet to measure the speed of rotating ferrous targets. The package features an integrated capacitor for electromagnetic compatibility (EMC).

The ATS19420 SolidSpeed Digital Architecture™ offers intelligent algorithms capable of stable operation during sudden and dynamic air gap movements. The sophisticated digital controller provides highly accurate speed detection ideal for transmission applications. In addition, the ATS19420 differential sensing offers inherent rejection of interfering common-mode magnetic fields.

The ATS19420 was developed in accordance with ISO 26262:2011 as a hardware safety element out of context with ASIL B capability (pending assessment) for use in automotive safety-related systems when integrated and used in the manner prescribed in the applicable safety manual and datasheet.

The ATS19420 is provided in a 3-pin SIP package (suffix SN) that is lead (Pb) free, with tin leadframe plating. The SN package includes an IC, magnet, and capacitor integrated into a single overmolded package, with an additional molded lead-stabilizing bar for robust shipping and ease of assembly.


  • Differential Hall-effect sensor measures ferrous targets with inherent stray field immunity
  • SolidSpeed Digital Architecture™ supports advanced algorithms, maintaining pitch and duty cycle accuracy during dynamic air gap disturbances
  • Integrated solution includes back-biased magnet and capacitor in a single overmolded package
  • ISO 26262:2011 ASIL B with integrated diagnostics and certified safety design process (pending assessment)
  • Two-wire current source output protocol supporting speed and ASIL error reporting
  • EEPROM enables factory traceability throughout product life cycle

Typical Applications

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check Stock
A19420LUBBTN-E 2-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Distributor Stock
A19420LUBBTN-G 2-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Distributor Stock
ATS19420LSNBTN 3-lead SIP -40°C to 150°C -- View Data Contact your
local sales rep
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.