DocID030747 Rev 1

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STWBC-EP

Electrical characteristics

32

6.9

Operating conditions

The device must be used in operating conditions that comply with the parameters in Table 6.

In addition, a full account must be taken for all physical capacitor characteristics and

tolerances.

Table 6. General operating conditions

Symbol

Parameter

Conditions

Min.

Typ. Max. Unit

Internal CPU clock frequency

-

-

16

-

MHz

-

1. The external power supply can range from 3 V to 5.5 V although IC performances are optimized for power

supply equal to 5 V.

5

5.5(1)

V

-

3.3(1)

55(1)

Core digital power supply

-

-

2. Internal core power supply voltage.

-

CVOUT: capacitance of external

3. Care should be taken when the capacitor is selected due to its tolerance, its dependency on temperature,

DC bias and frequency.

at 1 MHz

470

-

3300

nF

ESR of external capacitor

-

0.05

-

0.2



ESL of external capacitor

-

-

-

15

nH



JA

(4)

FR4 multilayer PCB

VFQFPN32

-

26

-

°C/W

Ambient temperature

Pd = 100 mW

-40

-

105

°C

Table 7. Operating conditions at power-up/power-down

Symbol

Parameter

Conditions

Min

Typ.

Max

Unit

Power-on reset threshold

-

2.65

2.8

1. VDD rise must be monotone. The slew rate should be between 1

V/s to 0.5 V/s.

V

Brownout reset threshold

-

2.58

2.73

2.88(1)

Brownout reset hysteresis

-

-

70

-

mV