Datasheet

DocID022691 Rev 7 69/137
STM32F373xx Electrical characteristics
114
Table 35. Switching output I/O current consumption
Symbol Parameter Conditions
(1)
I/O toggling
frequency (f
SW
)
Typ Unit
I
SW
I/O current
consumption
V
DD
= 3.3 V
C
ext
= 0 pF
C = C
INT
+ C
EXT
+ C
S
2 MHz 0.77
mA
4 MHz 0.87
8 MHz 0.95
18 MHz 1.59
36 MHz 2.57
48 MHz 3.11
V
DD
= 3.3 V
C
ext
= 10 pF
C = C
INT
+ C
EXT
+ CS
2 MHz 0.96
4 MHz 1.0
8 MHz 1.08
18 MHz 2.17
36 MHz 3.42
48 MHz 5.50
V
DD
= 3.3 V
C
ext
= 22 pF
C = C
INT
+ C
EXT
+ CS
2 MHz 0.98
4 MHz 1.23
8 MHz 1.48
18 MHz 2.93
36 MHz 6.59
48 MHz 7.03
V
DD
= 3.3 V
C
ext
= 33 pF
C = C
INT
+ C
EXT
+ C
S
2 MHz 1.03
mA
4 MHz 1.3
8 MHz 1.81
18 MHz 3.42
36 MHz 8.27
V
DD
= 3.3 V
C
ext
= 47 pF
C = C
INT
+ C
EXT
+ C
S
2 MHz 1.09
4 MHz 1.55
8 MHz 2.18
18 MHz 4.38
36 MHz 9.65
1. C
S
= 5 pF (estimated value).
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