STM32F407IE datasheet(107/180 Pages) STMICROELECTRONICS

107 / 180 page

STM32F405xx, STM32F407xx

Electrical characteristics

Doc ID 022152 Rev 3

107/180

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 35 and

Table 48, respectively.

Unless otherwise specified, the parameters given in Table 48 are derived from tests

performed under the ambient temperature and VDD supply voltage conditions summarized

in Table 13.

Based on characterization data, not tested in production.

Table 48.

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

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