Datasheet

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STM32F427xx STM32F429xx Electrical characteristics
198
Table 34. Switching output I/O current consumption
(1)
1. C
S
is the PCB board capacitance including the pad pin. C
S
= 7 pF (estimated value).
Symbol Parameter Conditions
I/O toggling
frequency
(fsw)
Typ Unit
I
DDIO
I/O switching
Current
V
DD
= 3.3 V
C= C
INT
(2)
2. This test is performed by cutting the LQFP176 package pin (pad removal).
2 MHz 0.0
mA
8 MHz 0.2
25 MHz 0.6
50 MHz 1.1
60 MHz 1.3
84 MHz 1.8
90 MHz 1.9
V
DD
= 3.3 V
C
EXT
= 0 pF
C = C
INT
+ C
EXT
+ C
S
2 MHz 0.1
8 MHz 0.4
25 MHz 1.23
50 MHz 2.43
60 MHz 2.93
84 MHz 3.86
90 MHz 4.07
I
DDIO
I/O switching
Current
V
DD
= 3.3 V
C
EXT
= 10 pF
C = C
INT
+ C
EXT
+ C
S
2 MHz 0.18
mA
8 MHz 0.67
25 MHz 2.09
50 MHz 3.6
60 MHz 4.5
84 MHz 7.8
90 MHz 9.8
V
DD
= 3.3 V
C
EXT
= 22 pF
C = C
INT
+ C
EXT
+ C
S
2 MHz 0.26
8 MHz 1.01
25 MHz 3.14
50 MHz 6.39
60 MHz 10.68
V
DD
= 3.3 V
C
EXT
= 33 pF
C = C
INT
+ Cext
+ C
S
2 MHz 0.33
8 MHz 1.29
25 MHz 4.23
50 MHz 11.02
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