STM8S207MBT3B datasheet(56/103 Pages) STMICROELECTRONICS

56 / 103 page

Electrical characteristics

STM8S207xx, STM8S208xx

56/103

Doc ID 14733 Rev 9

10.3

Operating conditions

The device must be used in operating conditions that respect the parameters in Table 18. In

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

Table 18.

General operating conditions

Symbol

Parameter

Conditions

Min

Max

Unit

fCPU

Internal CPU clock frequency

TA ≤ 105 °C

MHz

VDD/VDD_IO Standard operating voltage

2.95

5.5

VCAP

CEXT: capacitance of

external capacitor(1)

Care should be taken when selecting the capacitor, due to its tolerance, as well as its dependency on

temperature, DC bias and frequency in addition to other factors.

At 1 MHz

470

3300

ESR of external capacitor(1)

0.3

Ohm

ESR of external capacitor(1)

(2)

To calculate PDmax(TA), use the formula PDmax = (TJmax - TA)/ΘJA (see Section 11.2: Thermal

characteristics on page 96) with the value for TJmax given in Table 18 above and the value for

JA given in

Table 57: Thermal characteristics.

Power dissipation at

TA = 85° C for suffix 6

or TA = 125° C for suffix 3

44, 48, 64, and 80-pin

devices, with output on 8

standard ports, 2 high sink

ports and 2 open drain ports

simultaneously(3)

Refer to Section 11.2: Thermal characteristics on page 96 for the calculation method.

443

32-pin package, with output

on 8 standard ports and 2

high sink ports

simultaneously(3)

360

Ambient temperature for 6

suffix version

Maximum power dissipation

-40

°C

Ambient temperature for 3

suffix version

Maximum power dissipation

-40

125

Junction temperature range

6 suffix version

-40

105

3 suffix version

-40

130(4)

TJmax is given by the test limit. Above this value the product behavior is not guaranteed.

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