VNF9D5F datasheet(86/106 Pages) STMICROELECTRONICS

86 / 106 page

Table 72. Component values

Reference

Value

Comment

RVDD

330 Ω

Device logic protection

CVCC

100 nF

Battery voltage spikes filtering mounted close to IC

RCSN

2.7 kΩ

Microcontroller protection during overvoltage and reverse polarity

RSCK

2.7 kΩ

Microcontroller protection during overvoltage and reverse polarity

RSDI

2.7 kΩ

Microcontroller protection during overvoltage and reverse polarity

RSDO2

220 Ω

Microcontroller protection during overvoltage and reverse polarity

RSDO1

50 Ω

Optional

BAT54

Microcontroller protection during overvoltage and reverse polarity

RPWM_CLK,

RSTDBY_NOT

2.2 kΩ

Microcontroller protection during: overvoltage, reverse polarity

and loss of GND

RDI0

15 kΩ

Microcontroller protection during: overvoltage, reverse polarity

and loss of GND

RDI1

15 kΩ

Microcontroller protection during: overvoltage, reverse polarity

and loss of GND

Suppressor 20 V

Negative transient protection.

Suppressor 36 V

Overvoltage protection.

RGND

4.7 kΩ

DGND

BAS21 for VDD = 5 V,

Schottky (that is, BAT54-Y)

for VDD = 3.3 V

Reverse polarity protection. Usage of schottky or standard diode

dependent on VDD

DVCC

Schottky 40 V

Typical components used in applicative environment are 1N5822

or STPS1H100

CDD

1 nF

RDD

100 Ω

CREG

2.2 μF

RREG

120 Ω

Further information about the application schematic are provided in the dedicated application note.

VNF9D5F

Application schematics

DS13946 - Rev 6

page 86/106

VNF9D5F Datasheet(PDF) 86 Page - STMicroelectronics

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