A1344EUA-T High-Sensitivity 44E Hall Effect Sensor Switch – Wide Voltage Range, Industrial Grade (Made in CHN)

Description

The A1344EUA-T (44E) is a unipolar digital Hall effect sensor switch designed for non-contact magnetic field detection. It integrates a Hall voltage generator, voltage regulator, differential amplifier, Schmitt trigger, and open-collector NPN output in a single 3-pin package . The sensor triggers when the South pole of a magnet approaches the marked face, pulling the output LOW; when the magnet is removed, the output returns HIGH via an external pull-up resistor .

The device is widely used as a drop-in replacement for the A3144 series, offering similar functionality for speed sensing, position detection, and proximity switching . It operates from 4.5V to 24V (per the AH3144E datasheet) and handles -20°C to +85°C for the E-suffix variant . The open-collector output can sink up to 25mA, making it compatible with TTL and CMOS logic circuits .

Critical limitations: The output is open-collector, requiring a pull-up resistor (internal or external 10kΩ). The sensor is unipolar—it responds to the South pole only; the North pole does not trigger it . The “Made in CHN” designation indicates a Chinese-manufactured compatible part, not an original Allegro device.

Features

• Unipolar Operation: Triggers on South magnetic pole; releases when the magnet is removed .

• Open-Collector NPN Output: Sinks up to 25mA; requires a pull-up resistor .

• Wide Supply Voltage (4.5–24V): Compatible with 5V and 12V systems .

• Fast Switching: No contact bounce; operating frequency DC to 100kHz .

• Direct Logic Interface: Compatible with TTL, MOS, and transistor logic .

• Reverse Polarity Protection: Built-in protection against supply reversal .

• A3144-Compatible: Functions as a replacement for the widely used A3144 series .

• 3-Pin Through-Hole Package: TO-92 style for easy breadboard and PCB mounting .

Technical Specifications