STM32F407IG datasheet(101/167 Pages) STMICROELECTRONICS

101 / 167 page

STM32F405xx, STM32F407xx

Electrical characteristics

Doc ID 022152 Rev 2

101/167

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 34 and

Table 46, respectively.

Unless otherwise specified, the parameters given in Table 46 are derived from tests

performed under the ambient temperature and VDD supply voltage conditions summarized

in Table 11.

Table 46.

I/O AC characteristics(1)(2)(3)

OSPEEDRy

[1:0] bit

value(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fmax(IO)out Maximum frequency

(4)

CL = 50 pF, VDD > 2.70 V

MHz

CL = 50 pF, VDD > 1.8 V

CL = 10 pF, VDD > 2.70 V

TBD

CL = 10 pF, VDD > 1.8 V

TBD

tf(IO)out

Output high to low level fall

time

CL = 50 pF, VDD = 1.8 V to

3.6 V

TBD

tr(IO)out

Output low to high level rise

time

TBD

fmax(IO)out Maximum frequency

(4)

CL = 50 pF, VDD > 2.70 V

MHz

CL = 50 pF, VDD > 1.8 V

12.5(5)

CL = 10 pF, VDD > 2.70 V

50(5)

CL = 10 pF, VDD > 1.8 V

TBD

tf(IO)out

Output high to low level fall

time

CL = 50 pF, VDD < 2.7 V

TBD

CL = 10 pF, VDD > 2.7 V

TBD

tr(IO)out

Output low to high level rise

time

CL = 50 pF, VDD < 2.7 V

TBD

CL = 10 pF, VDD > 2.7 V

TBD

fmax(IO)out Maximum frequency

(4)

CL = 40 pF, VDD > 2.70 V

50(5)

MHz

CL = 40 pF, VDD > 1.8 V

CL = 10 pF, VDD > 2.70 V

100(5)

CL = 10 pF, VDD > 1.8 V

TBD

tf(IO)out

Output high to low level fall

time

CL = 50 pF, 2.4 < VDD < 2.7 V

TBD

CL = 10 pF, VDD > 2.7 V

TBD

tr(IO)out

Output low to high level rise

time

CL = 50 pF, 2.4 < VDD < 2.7 V

TBD

CL = 10 pF, VDD > 2.7 V

TBD

STM32F407IG Datasheet(PDF) 101 Page - STMicroelectronics

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