SS2509-R

Hall Latch - High Sensitivity

4

V3.10

Dec 1, 2014

Output Behavior versus Magnetic Pole

Test Conditions (UA)

Test Conditions (ST)

OUT

High

Low

The TSOT-23 device is reversed from the UA package. The TSOT-23 output transistor will be turned on(drops low) in the presence of a

sufficiently strong South pole magnetic field applied to the marked face and turned off(hoists high) in the presence of a sufficiently

strong North pole magnetic field.

Detailed General Description

The SS2509-R exhibits latch magnetic switching characteristics. Therefore, it requires both south and north poles

to operate properly.

In the case of UA package,the OUT pin of these devices switches low (turns on) when a magnetic field perpendic-

Note that the device latches, that is, a north pole of sufficient strength towards the branded surface of the device

turns the device on. The device remains on if the south pole is removed (B

→0). This latching property defines the

device as a magnetic memory.

put oscillation near the switching point, and allows clean switching of the output even in the presence of external

mechanical vibration and electrical noise.

0mT

0mT

Output level

Output level

OUT = High

Flux density

OUT = High

23Gs typ

OUT = Low

OUT = Low

UA package - Latch characteristic

-23Gs typ

-23Gs typ

23Gs typ

Flux density

ST package - Latch characteristic