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L9952GXP датащи(PDF) 37 Page - STMicroelectronics

номер детали L9952GXP
подробное описание детали  Power management system IC
PDF  68 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9952GXP датащи(HTML) 37 Page - STMicroelectronics

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L9952GXP
Electrical characteristics
Doc ID 13518 Rev 5
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7.6
Reset generator (V1 supervision)
The voltages are referred to GND and currents are assumed positive, when the current
flows into the pin. 5.25V < VS = 18V; Tj = -40 to 130 °C, unless otherwise specified.
7.7
Watchdog
6V < VS < 18V; 4.8V < V1 < 5.2V; Tj = -40 to 130 °C, unless otherwise specified
Table 15.
Reset generator
Item
Symbol
Parameter
Test condition
Min.
Typ. Max. Unit
7.6.1
VRT1
Reset threshold voltage1
VS, VV1 inc. /
decreasing
4.5
4.63
4.75
V
7.6.2
VRT2
Reset threshold voltage2
VS, VV1 inc. /
decreasing
4.25
4.37
4.5
V
7.6.3
VRESET
Reset pin low output
voltage
V1 > 1V,
IRESET = 1mA
0,2
0,4
V
7.6.4
RRESET
Reset pull up int. resistor
60
110
204
k
Ω
7.6.5
tRR
Reset reaction time
@Iload = 1mA
6
40
µs
7.6.6
V1 under-voltage filter time
16
µs
Table 16.
Watchdog (1)
1.
See Figure 13.
Item
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
7.7.1
tLW
Long open window
48,75
65
81,25
ms
7.7.2
tCW
Closed window
4.5
6
7.5
ms
7.7.3
tOW
Open window
7.5
10
12.5
ms
7.7.4
tWDR
Watchdog reset pulse time
1.5
2
2. 5
ms



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