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SK1816G-AE3-R

Bipolar latch Hall effect sensor, 2.5-20V, ±5mT, SOT-23, -30 to +125°C, built-in protection

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Manufacturer Part：

SK1816G-AE3-R

Package：

SOT-23 (2.9 x 1.3 x 1.0 mm)

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Description

Product Overview

The SK1816G-AE3-R is a bipolar latch type Hall effect sensor IC manufactured by Unisonic Technologies (UTC). Designed for high-temperature operation up to +125°C, this Hall IC operates from a 2.5V to 20V supply voltage in alternating magnetic fields. The SOT-23 package variant features an open-drain output that directly drives TTL and MOS logic, with a built-in protection diode and operate/release points of +5mT/-5mT.

Key Specifications

Supply Voltage Range 2.5V to 20V
Operate Point (BOP) 5 mT
Release Point (BRP) -5 mT
Hysteresis (BHYS) 5.5 to 10 mT
Supply Current 6 mA (Typ) @ 16V
Output Saturation Voltage 0.7V Max @ 12mA
Output Switching Time 5μs rise / 1μs fall
Package SOT-23 (EIAJ SC-59)
Operating Temperature -30°C to +125°C
Packing Tape & Reel

Features

  • Wide supply voltage range from 2.5V to 20V
  • Wide temperature operation range from -30°C to +125°C
  • Bipolar latching operation for alternating magnetic field sensing
  • Built-in protection diode for reverse voltage protection
  • TTL and MOS logic compatible open-drain output
  • Contact-less operation for semi-permanent lifetime

Applications

  • DC motor commutation and speed sensing
  • Position and rotation sensing
  • Contact-less switches and proximity detectors
  • Automotive motor control
  • Industrial automation sensors

The UTC SK1816G-AE3-R is a semiconductor integrated circuit utilizing the Hall effect for magnetic field detection. Designed specifically for operation in alternating magnetic fields, this bipolar latch type Hall sensor operates from a wide 2.5V to 20V supply voltage range with extended temperature capability to +125°C. The device features a Hall element, amplifier, Schmitt trigger, and output stage integrated on a single chip. The open-drain output can directly drive TTL and MOS logic ICs, and the built-in protection diode provides reverse voltage protection. The G suffix denotes halogen-free and lead-free green packaging. Available in both SOT-23 (AE3) and SIP-3 (G03) packages, the AE3-R variant comes in tape and reel packaging for automated SMT assembly.

The SK1816G-AE3-R operates as a bipolar latching Hall effect sensor. The internal Hall element generates a voltage proportional to the applied magnetic field perpendicular to the chip surface. This Hall voltage is amplified and fed into a Schmitt trigger with hysteresis. When the magnetic flux density exceeds the operate point (BOP = +5mT, South pole), the output transistor turns on (output goes low). The output remains in this state even when the field is removed, until the magnetic flux crosses the release point (BRP = -5mT, North pole), at which point the output transistor turns off (output goes high via external pull-up). This latching behavior requires alternating North-South pole magnetic fields for toggling, making it ideal for rotary speed and position sensing with multi-pole ring magnets. The hysteresis of 5.5-10mT between BOP and BRP ensures noise immunity and stable switching.

Pin Name Type Function
1 VOUT Output Open-drain output, active low
2 VCC Power Supply voltage (2.5V to 20V)
3 GND Power Ground connection
  • DC brushless motor commutation and speed sensing
  • Rotary encoder and speed measurement
  • Contact-less position and proximity detection
  • Automotive window and wiper motor control
  • Industrial conveyor and rotation monitoring
Manufacturer Part Number Package Notes
Allegro A3286LUA-T SOT-23 Bipolar latch Hall, similar spec
Honeywell SS411A SOT-89 Bipolar latch, 3.8-30V
Melexis MLX90215LSE-AAA SOT-23 Programmable latch Hall
Diodes Inc AH3272-SA-7 SOT-23 Bipolar latch, automotive
UTC SK1816G-G03-K SIP-3 Same IC, SIP-3 bulk package
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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