STM32H7B3AI datasheet(120/238 Pages) STMICROELECTRONICS

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Symbol

Parameter

Conditions(1)

Min

Max

Unit

VOL(3)

Output low level voltage

TTL port(2) IIO = 3 mA, 2.7 V≤ VDD ≤ 3.6 V

0.4

VOH(3)

Output high level voltage

TTL port(2) IIO=−3 mA, 2.7 V ≤ VDD ≤ 3.6 V

2.4

VOL(3)

Output low level voltage

IIO = 1.5 mA, 1.62 V ≤ VDD ≤ 3.6 V

0.4

VOH (3)

Output high level voltage

IIO = −1.5 mA, 1.62 V ≤ VDD < 3.6 V

VDD−0.4

1. The IIO current sourced or sunk by the device must always respect the absolute maximum rating specified in

Table 19. Voltage characteristics, and the sum of the currents sourced or sunk by all the I/Os (I/O ports and control pins)

must always respect the absolute maximum ratings ΣIIO.

2. TTL and CMOS outputs are compatible with JEDEC standards JESD36 and JESD52.

3. Guaranteed by design.

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 68. Output timing characteristics (HSLV OFF)

The frequency of the GPIOs that can be supplied in VBAT mode (PC13, PC14, PC15 and PI8) is limited to 2 MHz.

Speed Symbol

Parameter

conditions

Min(1) Max(1) Unit

Fmax(2)

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 (3)

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(2)

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 (3)

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

STM32H7B3xI

Operating conditions

DS13139 - Rev 8

page 120/238

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