Datasheet

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STM32F446xC/E Electrical characteristics
175
Table 14. Current characteristics
Symbol Ratings Max. Unit
ΣI
VDD
Total current into sum of all V
DD
power lines (source)
(1)
240
mA
Σ I
VSS
Total current out of sum of all V
SS
ground lines (sink)
(1)
- 240
Σ IV
DDUSB
Total current into V
DDUSB
power line (source) 25
I
VDD
Maximum current into each V
DD
power pin (source)
(1)
100
I
VSS
Maximum current out of each V
SS
ground pin (sink)
(1)
- 100
I
IO
Output current sunk by any I/O and control pin 25
Output current sourced by any I/Os and control pin - 25
ΣI
IO
Total output current sunk by sum of all I/Os and control pins
(2)
120
Total output current sunk by sum of all USB I/Os 25
Total output current sourced by sum of all I/Os and control pins
(2)
-120
I
INJ(PIN)
Injected current on FT, FTf, RST and B pins –5/+0
(3)
Injected current on TTa pins ±5
(4)
ΣI
INJ(PIN)
Total injected current (sum of all I/O and control pins)
(5)
±25
1. All main power (V
DD
, V
DDA
) and ground (V
SS
, V
SSA
) 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 LQFP packages.
3. Positive injection is not possible on these I/Os and does not occur for input voltages lower than the specified
maximum value.
4. A positive injection is induced by V
IN
>V
DDA
while a negative injection is induced by V
IN
<V
SS
. IINJ(PIN) must
never be exceeded. Refer to Table 13 for the maximum allowed input voltage value.
5. When several inputs are submitted to a current injection, the maximum ΣI
INJ(PIN)
is the absolute sum of the positive and
negative injected currents (instantaneous values).
Table 15. Thermal characteristics
Symbol Ratings Value Unit
T
STG
Storage temperature range –65 to +150 °C
T
J
Maximum junction temperature 125 °C
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