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SS2881ESOT Folha de dados(PDF) 4 Page - SEC Electronics Inc.

Nome de Peças SS2881ESOT
Descrição Electrónicos  Hall Latch - High Sensitivity
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Fabricante Electrônico  SECELECTRONICS [SEC Electronics Inc.]
Página de início  http://www.secsemi.com
Logo SECELECTRONICS - SEC Electronics Inc.

SS2881ESOT Folha de dados(HTML) 4 Page - SEC Electronics Inc.

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SS2881
Hall Latch - High Sensitivity
4
V3.10
Nov 1, 2013
Output Behavior versus Magnetic Pole
DC Operating Parameters TA = -40°C to 150°C, VDD = 3.5 to 24V (unless otherwise specified)
Test Conditions (UA)
Test Conditions (SO)
OUT
B < BRP
B > BRP
High
B > BOP
B < BOP
Low
The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be turned on(drops low) in the presence of a
sufficiently strong North pole magnetic field applied to the marked face and turned off(hoists high) in the presence of a sufficiently
strong South pole magnetic field.
Detailed General Description
The SS2881 exhibits latch magnetic switching characteristics. Therefore, it requires both south and north poles to
operate properly.
The OUT pin of these devices switches low (turns on) when a magnetic field perpendicular to the Hall sensor ex-
ceeds the operate point threshold, BOP. After turn-on, the output voltage is VDSon. Note that the device latches, that is,
a south 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.
When the magnetic field is reduced below the release point, BRP, the OUT pin turns off (goes high). The difference
in the magnetic operating and release points is the hysteresis, BHYST, of the device. This built-in hysteresis prevents
output oscillation near the switching point, and allows clean switching of the output even in the presence of external
mechanical vibration and electrical noise.
The device behaves as a latch with symmetric operating and release switching points (BOP=|BRP|). This means mag-
0mT
0mT
Output level
Output level
OUT = High
Flux density
OUT = High
BOP
30Gs typ
OUT = Low
OUT = Low
UA package - Latch characteristic
BOP
30Gs typ
BRP
-30Gs typ
BRP
-30Gs typ
Flux density
SE package - Latch characteristic
BHYS
BHYS


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