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L99MM70XP データシート(PDF) 35 Page - STMicroelectronics

部品番号 L99MM70XP
部品情報  INH input for external CAN transceiver
PDF  68 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99MM70XP データシート(HTML) 35 Page - STMicroelectronics

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L99MM70XP
Electrical characteristics
Doc ID 022637 Rev 2
35/68
8.5
Reset output (VCC supervision)
The voltages are referred to ground and currents are assumed positive, when the current
flows into the pin. 4 V
 V
S  28 V; Tamb = -40 °C...125 °C, unless otherwise specified.
8.6
Watchdog
4.5 V
 V
S  28 V; Tamb = -40 °C...125 °C, unless otherwise specified, see Figure 10 and
Figure 11.
ICMPfal
Current consumption falling
threshold
Falling current (deactivated
current monitor)
1.3
2.7
mA
ICMPhys
Current consumption
hysteresis
0.5
mA
VCCfail
VCC fail threshold
VCC forced
2
V
Table 12.
Voltage regulator VCC (continued)
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
Table 13.
Reset output (VCC supervision)
Symbol
Parameter
Test condition
Min.
Typ. Max.
Unit
VRT1
Reset threshold voltage1
VVCC increasing
CR1/Bit4 = 0(1)
1.
Delay time see tWDR below (Section 8.6: Watchdog).
4.6
4.7
4.85
V
VVCC decreasing
CR1/Bit4 = 0
4.5
4.6
4.7
V
VRT1HYST
Threshold voltage 1
hysteresis
0.1
V
VRT2
Reset threshold voltage2
VVCC increasing
CR1/Bit4 = 1(1)
3.6
3.7
3.9
V
VVCC decreasing
CR1/Bit4 = 1
3.0
3.3
3.5
V
VRT2HYST
Threshold voltage 2
hysteresis
0.4
V
VNRES
Reset Pin low output voltage
VCC >1V, INRES =1mA
0.2
0.4
V
RNRES
Reset pull up int. resistor
VNRES = 4 V
60
110
204
k
tRR
Reset reaction time
CNRES = 100 pF,
INRES =1 mA
40
µs
Table 14.
Watchdog
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
tLW
Watchdog cycle time
100
134
180
ms
tWDR
Watchdog reset pulse time
1.5
2.3
2.9
ms



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