STM8S103F2 datasheet(52/121 Pages) STMICROELECTRONICS

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Electrical characteristics

STM8S103F2 STM8S103F3 STM8S103K3

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DocID15441 Rev 14

10.3

Operating conditions

IINJ(PIN) (3) (4)

Injected current on NRST pin

±4

Injected current on OSCIN pin

±4

Injected current on any other pin(5)

±4

ΣIINJ(3)

Total injected current (sum of all I/O and control pins)(5)

±20

1. Guaranteed by characterization results.

2. All power (VDD) and ground (VSS) pins must always be connected to the external supply.

3. IINJ must never be exceeded. This condition is implicitly insured if VIN maximum is respected. If VIN

maximum cannot be respected, the injection current must be limited externally to the IINJ(PIN) value. A

positive injection is induced by VIN > VDD while a negative injection is induced by VIN < VSS. For true open-

drain pads, there is no positive injection current allowed and the corresponding VIN maximum must always

be respected.

4. ADC accuracy vs. negative injection current: Injecting negative current on any of the analog input pins

should be avoided as this significantly reduces the accuracy of the conversion being performed on another

analog input. It is recommended to add a Schottky diode (pin to ground) to standard analog pins which may

potentially inject negative current. Any positive injection current within the limits specified for IINJ(PIN) and

ΣIINJ(PIN) in the I/O port pin characteristics section does not affect the ADC accuracy.

5. When several inputs are submitted to a current injection, the maximum

ΣIINJ(PIN) is the absolute sum of the

positive and negative injected currents (instantaneous values). These results are based on characterization

with

ΣIINJ(PIN) maximum current injection on four I/O port pins of the device.

Table 18. Thermal characteristics

Symbol

Ratings

Value

Unit

TSTG

Storage temperature range

−65 to 150

°C

Maximum junction temperature

150

Table 17. Current characteristics (continued)

Symbol

Ratings

Max.(1)

Unit

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)

CEXT: capacitance of external

capacitor

470

3300

ESR of external capacitor

at 1 MHz(2)

-0.3

ESL of external capacitor

PD(3)

Power dissipation

at TA = 75 °C for suffix 6

TSSOP20

238

SO20W

220

UFQFPN20

220

LQFP32

330

UFQFPN32

526

SDIP32

330

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