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DS1231 Datasheet(PDF) 4 Page - Dallas Semiconductor

Part # DS1231
Description  Power Monitor Chip
PDF  9 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1231 Datasheet(HTML) 4 Page - Dallas Semiconductor

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DS1231/S
022698 4/9
INPUT PIN HYSTERESIS Figure 3
NMI
VOH
VTP+
VIN
VOL
MODE = GND, VCC = +5V
NMI
VOH
VIN
VOL
MODE = VCC, VCC = +5V
–20
2.3
2.5
–35
2.15
2.5
–50
2.0
2.5
VTP-
VTP+
NOTE: HYSTERESIS TOLERANCE IS +60 mV
VTP-
VTP+
VTP-
APPLICATION WITH MODE PIN CONNECTED TO VCC Figure 4
DS1231
VCC
NMI
RST
RST
IN
MODE
TOL
GND
+5V
+5V
R2
R1
VOLTAGE SENSE POINT
TO
mP
V SENSE
+
R1
) R2
R2
X2.3
VMAX
+
V SENSE
VTP
*
X5.0
THEN 8
+
R1
) 10K
10K
X2.3
R1 = 25K
EXAMPLE: V SENSE = 8 VOLTS AT TRIP POINT AND A
MAXIMUM VOLTAGE OF 17.5V WITH R2 = 10K
(-5% VCC THRESHOLD)
NOTE: RST requires a pull–up resister.



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