STM32L412R8T3PTR datasheet(76/192 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L412xx

76/192

DS12469 Rev 8

|∆VDDx|

Variations between different VDDX power

pins of the same domain

-50

|VSSx-VSS|

Variations between all the different ground

pins(5)

-50

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

supply, in the permitted range.

2. VIN maximum must always be respected. Refer to Table 19: Current characteristics for the maximum allowed injected

current values.

3. This formula has to be applied only on the power supplies related to the IO structure described in the pin definition table.

4. To sustain a voltage higher than 4 V the internal pull-up/pull-down resistors must be disabled.

5. Include VREF- pin.

Table 18. Voltage characteristics(1) (continued)

Symbol

Ratings

Min

Max

Unit

Table 19. Current characteristics

Symbol

Ratings

Max

Unit

∑IVDD

Total current into sum of all VDD power lines (source)(1)(2)

140

∑IVSS

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

140

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 except FT_f

Output current sunk by any FT_f pin

Output current sourced by any I/O and control pin

∑IIO(PIN)

Total output current sunk by sum of all I/Os and control pins(3)

100

Total output current sourced by sum of all I/Os and control pins(3)

100

IINJ(PIN)(4)

Injected current on FT_xxx, TT_xx, RST and B pins, except PA4,

PA5

-5/+0(5)

Injected current on PA4, PA5

-5/0

∑|IINJ(PIN)|

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

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

supplies, in the permitted range.

2. Valid also for VDD12 on SMPS packages.

3. 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.

4. Positive injection (when VIN > VDDIOx) is not possible on these I/Os and does not occur for input voltages lower than the

specified maximum value.

5. A negative injection is induced by VIN < VSS. IINJ(PIN) must never be exceeded. Refer also to Table 18: Voltage

characteristics for the maximum allowed input voltage values.

6. When several inputs are submitted to a current injection, the maximum ∑|IINJ(PIN)| is the absolute sum of the negative

injected currents (instantaneous values).

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