5.2

Power supply filtering

As mentioned in Section 2 Pin and signal description, the power supply of the circuit must be filtered using the

circuit shown in the figure below.

Figure 9. Mandatory filtering capacitors on VPS

TPM

Host device

RESET#

VPS

GND

100 nF

10 µF

-

IRQ#

SCL

SDA

+

1.

10 µF and 100 nF are recommended values. The minimum required capacitor value is 2.1 µF (2 µF in

parallel with 100 nF).

Table 10. Maximum VPS rising slope

Symbol

Parameter

Value

Unit

SVPS

Maximum VPS rising slope

3.3

V/µs

ST33TPHF2XI2C

Power supply filtering

DS14167 - Rev 1

page 14/30