参数资料
型号: DS1231SN-20
厂商: DALLAS SEMICONDUCTOR
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
封装: 0.300 INCH, SOIC-16
文件页数: 4/9页
文件大小: 70K
代理商: DS1231SN-20
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
IN
MODE
TOL
GND
+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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