Datasheet

Electrical characteristics STM32L476xx
116/270 DS10198 Rev 8
|V
DDx
|
Variations between different V
DDX
power
pins of the same domain
-50mV
|V
SSx
-V
SS
|
Variations between all the different ground
pins
(5)
-50mV
1. All main power (V
DD
, V
DDA
, V
DDIO2
, V
DDUSB
, V
LCD
, V
BAT
) and ground (V
SS
, V
SSA
) pins must always be connected to the
external power supply, in the permitted range.
2. V
IN
maximum must always be respected. Refer to Table 21: 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 20. Voltage characteristics
(1)
(continued)
Symbol Ratings Min Max Unit
Table 21. Current characteristics
Symbol Ratings Max Unit
IV
DD
Total current into sum of all V
DD
power lines (source)
(1)(2)
150
mA
IV
SS
Total current out of sum of all V
SS
ground lines (sink)
(1)
150
IV
DD(PIN)
Maximum current into each V
DD
power pin (source)
(1)(2)
100
IV
SS(PIN)
Maximum current out of each V
SS
ground pin (sink)
(1)
100
I
IO(PIN)
Output current sunk by any I/O and control pin except FT_f 20
Output current sunk by any FT_f pin 20
Output current sourced by any I/O and control pin 20
I
IO(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
I
INJ(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
|I
INJ(PIN)
| Total injected current (sum of all I/Os and control pins)
(6)
25
1. All main power (V
DD
, V
DDA
, V
DDIO2
, V
DDUSB
, V
LCD
, V
BAT
) and ground (V
SS
, V
SSA
) pins must always be connected to the
external power supplies, in the permitted range.
2. Valid also for V
DD12
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 V
IN
> V
DDIOx
) 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 V
IN
< V
SS
. I
INJ(PIN)
must never be exceeded. Refer also to Table 20: Voltage
characteristics for the minimum allowed input voltage values.
6. When several inputs are submitted to a current injection, the maximum
|
I
INJ(PIN)
|
is the absolute sum of the negative
injected currents (instantaneous values).
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