STM32F042G4 datasheet(46/117 Pages) STMICROELECTRONICS

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Electrical characteristics

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DocID025832 Rev 5

Table 19. Current characteristics

Symbol

Ratings

Max.

Unit

ΣIVDD

Total current into sum of all VDD power lines (source)(1)

120

ΣIVSS

Total current out of sum of all VSS ground lines (sink)(1)

-120

IVDD(PIN)

Maximum current into each VDD power pin (source)(1)

100

IVSS(PIN)

Maximum current out of each VSS ground pin (sink)(1)

-100

IIO(PIN)

Output current sunk by any I/O and control pin

Output current source by any I/O and control pin

-25

ΣIIO(PIN)

Total output current sunk by sum of all I/Os and control pins(2)

Total output current sourced by sum of all I/Os and control pins(2)

-80

Total output current sourced by sum of all I/Os supplied by VDDIO2

-40

IINJ(PIN)(3)

Injected current on FT and FTf pins

-5/+0(4)

Injected current on TC and RST pin

± 5

Injected current on TTa pins(5)

± 5

ΣIINJ(PIN)

Total injected current (sum of all I/O and control pins)(6)

± 25

1. All main power (VDD, VDDA) and ground (VSS, VSSA) pins must always be connected to the external power supply, in the

permitted range.

2. This current consumption must be correctly distributed over all I/Os and control pins. The total output current must not be

sunk/sourced between two consecutive power supply pins referring to high pin count QFP packages.

3. A positive injection is induced by VIN > VDDIOx while a negative injection is induced by VIN < VSS. IINJ(PIN) must never be

exceeded. Refer to Table 18: Voltage characteristics for the maximum allowed input voltage values.

4. Positive injection is not possible on these I/Os and does not occur for input voltages lower than the specified maximum

value.

5. On these I/Os, a positive injection is induced by VIN > VDDA. Negative injection disturbs the analog performance of the

device. See note (2) below Table 56: ADC accuracy.

6. 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).

Table 20. Thermal characteristics

Symbol

Ratings

Value

Unit

TSTG

Storage temperature range

–65 to +150

°C

Maximum junction temperature

150

°C

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