NOT RECOMMENDED FOR NEW DESIGN
USE AH3782
AH173
INTERNAL PULL-UP HALL EFFECT LATCH
FOR HIGH TEMPERATURE
Description
Pin Assignments
AH173 is a single-digital-output Hall-Effect latch sensor with pull-up
resistor for high temperature operation. The device includes an onchip Hall voltage generator for magnetic sensing, an amplifier to
amplify Hall voltage, a comparator to provide switching hysteresis for
noise rejection, and an output driver with a pull-up resistor (Rpu). 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
2. GND
1. Vcc
SIP-3
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.
(Top View)
3. OUT
The AH173 is available in SIP-3 and SC59 packages.
GND 2.
1. Vcc
SC59
Features
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Bipolar Hall-Effect Latch Sensor
3V to 20V DC Operating Voltage
Built-in Pull-up Resistor
25mA Output Sink Current
Operating Temperature: -40C to +125C
SIP-3 and SC59 Packages
(SC59 is Commonly Known as SOT23 in Asia)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
Applications
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Rotor Position Sensing
Current Switch
Encoder
RPM Detection
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
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