STM8S003F3 datasheet(49/104 Pages) STMICROELECTRONICS

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STM8S003F3 STM8S003K3

Electrical characteristics

9.3

Operating conditions

The device must be used in operating conditions that respect the parameters in Table 19. In

addition, full account must be taken of all physical capacitor characteristics and tolerances.

Figure 9. fCPUmax versus VDD

Table 19. General operating conditions

Symbol

Parameter

Conditions

Min

Max

Unit

fCPU

Internal CPU clock frequency

MHz

VDD

Standard operating voltage

2.95

5.5

VCAP(1)

1. Care should be taken when selecting the capacitor, due to its tolerance, as well as the parameter

dependency on temperature, DC bias and frequency in addition to other factors. The parameter maximum

values must be respected for the full application range.

CEXT: capacitance of external

capacitor

470

3300

ESR of external capacitor

At 1 MHz(2)

2. This frequency of 1 MHz as a condition for VCAP parameters is given by the design of the internal regulator.

-0.3

ohm

ESL of external capacitor

PD(3)

3. To calculate PDmax(TA), use the formula PDmax = (TJmax - TA)/ΘJA (see Section 10.4: Thermal

characteristics on page 97) with the value for TJmax given in Table 19 above and the value for

ΘJA given in

Table 55: Thermal characteristics.

Power dissipation at

TA = 85° C for suffix 6

TSSOP20

238

UFQFPN20

220

LQFP32

330

Ambient temperature for 6

suffix version

Maximum power dissipation

-40

°C

Junction temperature range

for 6 suffix version

-40

105

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