AH374

Document number: DS39163 Rev. 1 - 2

1 of 12

www.diodes.com

December 2016

© Diodes Incorporated

AH374

SINGLE PHASE HALL EFFECT LATCH

Description

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.

output is switched on (OUT pin is pulled low). The output state is held

The AH374 is available in SIP-3 (Ammo Pack), SIP-3 (Bulk Pack),

SC59 and SOT23 packages.

Features



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)

Pin Assignments

(Top View)

GND 2.

3. OUT

SC59 and SOT23

(Top View)

2. GND

3. OUT

SIP-3 (Bulk Pack)

Applications

•

Brush-Less DC Motor

•

Brush-Less DC Fan

•

Revolution Counting

•

Speed Measurement

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html

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 <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Typical Application Circuits

AH374

OUTPUT

GND

Typical AH374 Circuit

Note: