DESCRIPTION

The SS311PT/SS411P sensors are small, versatile digital Hall effect devices that are operated by the magnetic field from a permanent magnet or an electromagnet, designed to respond to alternating North and South poles.
These bipolar sensors have enhanced sensitivity which allows for the use of smaller, often less expensive magnets. The internal pull-up resistor often eliminates the need for external components, further helping to reduce system cost. These economical bipolar sensors are suited for many simple, high volume, cost-sensitive, rotary sensing applications.

FEATURES

• Subminiature, SOT-23 surface mount package (SS311PT) supplied on tape and reel allows for a compact design with automated component placement, helping to reduce manufacturing costs
• Small, leaded, flat TO-92 package (SS411P) often allows for more space on the PCB
• Sensitive, bipolar magnetics respond to alternating North and South poles, making these products suited for speed sensing and RPM measurement
• Built-in pull-up resistor can easily interface with common electronic circuits without adding external components, helping to reduce total system cost
• RoHS-compliant materials meet Directive 002/95/EC

POTENTIAL APPLICATIONS

Transportation:
• Speed and RPM (revolutions per minute) sensing
• Tachometer, counter pickup
• Motor and fan control
• Brushless dc motor control

Industrial and Commercial:

• Speed and RPM (revolutions per minute) sensing
• Tachometer, counter pickup
• Flow-rate sensing
• Brushless dc (direct current) motor commutation
• Motor and fan control
• Robotics control