AH374-SA-7

NOT RECOMMENDED FOR NEW DESIGN USE AH3774 AH374 SINGLE PHASE HALL EFFECT LATCH Description Pin Assignments The AH374 is an integrated Hall-Effect latched sensor designed for electronic commutation of brush-less DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open drain output. An internal band-gap regulator provides a temperature compensated supply voltage for internal circuits and allows a wide operating supply range. (Top View) 3. OUT GND 2. 1. VDD SC59 and SOT23 (Top View) When the magnetic flux density (B) is larger than operate point (BOP), output is switched on (OUT pin is pulled low). The output state is held on until a magnetic flux density reversal falls below BRP. When B is less than BRP, the output is switched off. 3. OUT 2. GND 1. VDD The AH374 is available in SIP-3 (Ammo Pack), SIP-3 (Bulk Pack), SC59 and SOT23 packages. SIP-3 (Bulk Pack) Features          Applications Bipolar Hall Effect Latch Operation 2.2V to 20V Operating Range Open Drain Pre-Driver 25mA Output Sink Capability -40C to +125°C Operating Temperature Industry Standard SIP-3 (Ammo Pack), SIP-3 (Bulk Pack), SC59 and SOT23 Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ Notes: • • • • Brush-Less DC Motor Brush-Less DC Fan Revolution Counting Speed Measurement 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain