STM32H757AI datasheet(159/251 Pages) STMICROELECTRONICS

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DS12931 Rev 1

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STM32H757xI

Electrical characteristics

230

Output buffer timing characteristics (HSLV option disabled)

The HSLV bit of SYSCFG_CCCSR register can be used to optimize the I/O speed when the

product voltage is below 2.7 V.

Table 75. Output timing characteristics (HSLV OFF)(1)(2)

Speed

Symbol

Parameter

conditions

Min

Max

Unit

Fmax(3)

Maximum frequency

C=50 pF, 2.7 V≤ VDD≤3.6 V

MHz

C=50 pF, 1.62 V≤VDD≤2.7 V

C=30 pF, 2.7 V≤VDD≤3.6 V

C=30 pF, 1.62 V≤VDD≤2.7 V

C=10 pF, 2.7 V≤VDD≤3.6 V

C=10 pF, 1.62 V≤VDD≤2.7 V

tr/tf(4)

Output high to low level

fall time and output low

to high level rise time

C=50 pF, 2.7 V≤ VDD≤3.6 V

16.6

C=50 pF, 1.62 V≤VDD≤2.7 V

33.3

C=30 pF, 2.7 V≤VDD≤3.6 V

13.3

C=30 pF, 1.62 V≤VDD≤2.7 V

C=10 pF, 2.7 V≤VDD≤3.6 V

C=10 pF, 1.62 V≤VDD≤2.7 V

Fmax(3)

Maximum frequency

C=50 pF, 2.7 V≤ VDD≤3.6 V

MHz

C=50 pF, 1.62 V≤VDD≤2.7 V

C=30 pF, 2.7 V≤VDD≤3.6 V

C=30 pF, 1.62 V≤VDD≤2.7 V

C=10 pF, 2.7 V≤VDD≤3.6 V

110

C=10 pF, 1.62 V≤VDD≤2.7 V

tr/tf(4)

Output high to low level

fall time and output low

to high level rise time

C=50 pF, 2.7 V≤ VDD≤3.6 V

5.2

C=50 pF, 1.62 V≤VDD≤2.7 V

C=30 pF, 2.7 V≤VDD≤3.6 V

4.2

C=30 pF, 1.62 V≤VDD≤2.7 V

7.5

C=10 pF, 2.7 V≤VDD≤3.6 V

2.8

C=10 pF, 1.62 V≤VDD≤2.7 V

5.2

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