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L99PM72PXP Datasheet(PDF) 58 Page - STMicroelectronics

Part # L99PM72PXP
Description  Advanced power management system IC with embedded LIN and high speed CAN transceiver supporting CAN Partial Networking
PDF  128 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99PM72PXP Datasheet(HTML) 58 Page - STMicroelectronics

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Electrical specifications
L99PM72PXP
58/128
Doc ID 023553 Rev 3
5.5.6
Reset output
The voltages are referred to GND and currents are assumed positive, when the current
flows into the pin. 4.0 V < VS < 28 V; Tj = -40°C to 130°C, unless otherwise specified.
5.5.7
Watchdog
4.5 V < VS <28V; 4.8V<V1 < 5.2 V; Tj = -40°C to 130°C, unless otherwise specified,
see Figure 31 and Figure 32.
tV2fail
V2 fail filter time
2
µs
tV2short
V2 short filter time
4
ms
1.
Nominal capacitor value required for stability of the regulator. Tested with 220 nF ceramic (+/- 20%).
Capacitor must be located close to the regulator output pin
Table 18.
Voltage regulator V2 (continued)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
Table 19.
Reset output
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
VRT1
Reset threshold voltage 1
VV1 decreasing
3.7
3.9
4.1
V
VRT2
Reset threshold voltage 2
VV1 decreasing
4.2
4.3
4.45
V
VRT3
Reset threshold voltage 3
VV1 decreasing
4.25
4.4
4.55
V
VRT4
Reset threshold voltage 4
VV1 decreasing
4.5
4.60
4.75
V
VV1 increasing
4.7
4.8
4.9
V
VRESET
Reset pin low output
voltage
V1 >1V; IRESET =5mA
0.2
0.4
V
RRESET Reset pull up int. resistor
80
110
150
k
tRR
Reset reaction time
ILOAD =1mA
6
40
s
tUV1
V1 undervoltage filter time
16
s
Trd
Reset pulse duration
1.46
2.0
2.5
ms
Table 20.
Watchdog
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
tLW
Long open window
48.75
65
81.25
ms
TEFW1
Early failure window 1
4.5
ms
TLFW1
Late failure window 1
20
ms
TSW1
Safe window 1
7.5
12
ms
TEFW2
Early failure window 2
22.3
ms
TLFW2
Late failure window 2
100
ms
TSW2
Safe window 2
37.5
60
ms
TEFW3
Early failure window 3
45
ms



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