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SS2881ESOT 데이터시트(PDF) 5 Page - SEC Electronics Inc.

부품명 SS2881ESOT
상세설명  Hall Latch - High Sensitivity
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제조업체  SECELECTRONICS [SEC Electronics Inc.]
홈페이지  http://www.secsemi.com
Logo SECELECTRONICS - SEC Electronics Inc.

SS2881ESOT 데이터시트(HTML) 5 Page - SEC Electronics Inc.

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SS2881
Hall Latch - High Sensitivity
5
V3.10
Nov 1, 2013
netic fields with equivalent strength and opposite direction drive the output high and low.
Powering-on the device in the hysteresis region (less than BOP and higher than BRP) allows an indeterminate output
state. The correct state is attained after the first excursion beyond BOP or BRP.
The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be latched on in the pres-
ence of a sufficiently strong North pole magnetic field applied to the marked face.
Application Information
It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) be-
tween the supply (VDD Pin) and ground (GND Pin) of the device to reduce both external noise and noise generated by
the chopper stabilization technique. As is shown in the following two
figures in next page, a 0.1μF capacitor is typical.
For reverse voltage protection, it is recommended to connect a resistor or a diode in series with the VDD pin. When
using a resistor, three points are important:
- the resistor has to limit the reverse current to 50mA maximum (VCC / R1
≤ 50mA)
- the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1*IDD)
- the resistor has to withstand the power dissipated in reverse voltage condition (PD = VCC
2/R1)
When using a diode, a reverse current cannot flow and the voltage drop is almost constant (
≈0.7V).
Therefore, a 100
Ω/0.25W resistor for 5V app lication and a diode for higher supply voltage are recommended. Both
solutions provide the required reverse voltage protection.
When a weak power supply is used or when the device is intended to be used in noisy environment, it is recommended
the following figure is used.
The low-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occurring
on the device supply voltage VDD. The diode D1 provides additional reverse voltage protection.
Typical Three-Wire Application Circuit
SS2881
R2
C2
VDD
GND
OUT
C1
Automotive and Severe Environment Protection Circuit
SS2881
R1:100
R2
C2
VDD
GND
OUT
C1
Z1
D1


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