STM32F479AI datasheet(91/217 Pages) STMICROELECTRONICS

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STM32F479xx

Electrical characteristics

190

Table 15. Current characteristics

Symbol

Ratings

Max.

Unit

ΣIVDD

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

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

supply, in the permitted range.

290

Σ IVSS

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

− 290

Σ IVDDUSB

Total current into VDDUSB power line (source)

IVDD

Maximum current into each VDD_x power line (source)(1)

100

IVSS

Maximum current out of each VSS_x ground line (sink)(1)

− 100

IIO

Output current sunk by any I/O and control pin

Output current sourced by any I/Os and control pin

− 25

ΣIIO

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

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.

120

Total output current sunk by sum of all USB I/Os

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

− 120

IINJ(PIN) (3)

3. Negative injection disturbs the analog performance of the device. See note in Section 5.3.24.

Injected current on FT pins (4)

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

specified maximum value.

− 5/+0

Injected current on NRST and BOOT0 pins (4)

Injected current on TTa pins(5)

5. A positive injection is induced by VIN>VDDA while a negative injection is induced by VIN<VSS. IINJ(PIN) must

never be exceeded. Refer to Table 14 for the values of the maximum allowed input voltage.

±5

ΣIINJ(PIN)(5) Total injected current (sum of all I/O and control pins)(6)

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).

±25

Table 16. Thermal characteristics

Symbol

Ratings

Value

Unit

TSTG

Storage temperature range

− 65 to +150

°C

Maximum junction temperature

125

°C

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