S-5742NBL0I-Y3N2U Datasheet, PDF (11/21 Pages) Seiko Instruments Inc – HIGH-WITHSTAND VOLTAGE HIGH-SPEED

HIGH-WITHSTAND VOLTAGE HIGH-SPEED BIPOLAR HALL EFFECT LATCH
Rev.2.1_00
S-5742 I Series
3. Basic operation
This IC changes the output voltage (V_OUT) according to the level of the magnetic flux density and a polarity change (N
pole or S pole) applied by a magnet.
3. 1 Product with V_OUT = "L" at S pole detection
When the magnetic flux density of the S pole perpendicular to the marking surface exceeds the operation point
(B_OP) after the S pole of a magnet is moved closer to the marking surface of this IC, V_OUT changes from "H" to "L".
When the N pole of a magnet is moved closer to the marking surface of this IC and the magnetic flux density of the
N pole is higher than the release point (B_RP), V_OUT changes from "L" to "H". In case of B_RP < B < B_OP, V_OUT retains
the status. Figure 13 shows the relationship between the magnetic flux density and V_OUT.
V_OUT
B_HYS
H
N pole
B_RP
0
B_OP
Magnetic flux density (B)
L
S pole
Figure 13
3. 2 Product with V_OUT = "H" at S pole detection
When the magnetic flux density of the S pole perpendicular to the marking surface exceeds B_OP after the S pole of a
magnet is moved closer to the marking surface of this IC, V_OUT changes from "L" to "H". When the
N pole of a magnet is moved closer to the marking surface of this IC and the magnetic flux density of the N pole is
higher than B_RP, V_OUT changes from "H" to "L". In case of B_RP < B < B_OP, V_OUT retains the status.
Figure 14 shows the relationship between the magnetic flux density and V_OUT.
V_OUT
B_HYS
H
N pole
B_RP
0
B_OP
Magnetic flux density (B)
Figure 14
L
S pole
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