AH173-WG-7-A

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 • • • • • • • • Bipolar Hall-Effect Latch Sensor 3V to 20V DC Operating Voltage Built-in Pull-up Resistor 25mA Output Sink Current Operating Temperature: -40C to +125C 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 • • • • 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