Electrical characteristics
STM8S207xx, STM8S208xx
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
TA ≤ 105 °C
Min
Max
Unit
0
0
24
16
MHz
MHz
V
fCPU
Internal CPU clock frequency
VDD/VDD_IO Standard operating voltage
2.95
5.5
C
EXT: capacitance of
470
3300
nF
external capacitor(1)
VCAP
At 1 MHz
ESR of external capacitor(1)
ESR of external capacitor(1)
0.3
15
Ohm
nH
44, 48, 64, and 80-pin
devices, with output on 8
standard ports, 2 high sink
ports and 2 open drain ports
simultaneously(3)
443
360
Power dissipation at
TA = 85° C for suffix 6
or TA = 125° C for suffix 3
(2)
PD
mW
32-pin package, with output
on 8 standard ports and 2
high sink ports
simultaneously(3)
Ambient temperature for 6
suffix version
Maximum power dissipation
Maximum power dissipation
-40
-40
85
TA
TJ
Ambient temperature for 3
suffix version
125
°C
6 suffix version
3 suffix version
-40
-40
105
Junction temperature range
130(4)
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.
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 ΘJA given in
Table 57: Thermal characteristics.
3. Refer to Section 11.2: Thermal characteristics on page 96 for the calculation method.
4. T
is given by the test limit. Above this value the product behavior is not guaranteed.
Jmax
56/103
Doc ID 14733 Rev 9
STMICROELECTRONICS [ ST ]
