STM32U545NET3QTR datasheet(212/283 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32U545xx

212/283

DS14216 Rev 1

(cont’d)

tr/tf

Output rise and fall time

FT_v and TT_v I/Os

CL = 30 pF, 2.7 V ≤ VDDIOx ≤ 3.6 V

2.5(5)

CL = 30 pF, 1.58 V ≤ VDDIOx < 2.7 V

5.0(5)

CL = 30 pF, 1.08 V ≤ VDDIOx < 1.58 V

CL = 10 pF, 2.7 V ≤ VDDIOx ≤ 3.6 V

1.66(5)

CL = 10 pF, 1.58 V ≤ VDDIOx < 2.7 V

3.1(5)

CL = 10 pF, 1.08 V ≤ VDDIOx < 1.58 V

Fm+

Fmax

Maximum frequency

CL = 550 pF, 1.08 V ≤ VDDIOx < 3.6 V

MHz

Output fall time(6)

CL = 100 pF, 1.58 V ≤ VDDIOx < 3.6 V

CL = 100 pF, 1.08 V ≤ VDDIOx < 1.58 V

CL = 550 pF, 1.58 V ≤ VDDIOx < 3.6 V

100

CL = 550 pF, 1.08 V ≤ VDDIOx < 1.58 V

220

1. FT_t I/O characteristics are degraded only in VBAT mode (refer to Table 99).

2. The I/O structure options listed in this table can be a concatenation of options including the option explicitly listed. For

instance TT_a refers to any TT I/O with _a option. TT_xx refers to any TT I/O and FT_xx refers to any FT I/O.

3. The I/O speed is configured using the OSPEEDRy[1:0] bits. Refer to the product reference manual for a description of GPIO

port configuration register.

4. Specified by design. Not tested in production.

5. Compensation system enabled.

6. The fall time is defined between 70% and 30% of the output waveform accordingly to I2C specification.

Table 96. Output AC characteristics, HSLV OFF (all I/Os except FT_c,

FT_t in VBAT mode, and FT_o I/Os(1))(2)(3)(4) (continued)

Speed Symbol

Parameter

Conditions

Min

Max

Unit

Table 97. Output AC characteristics, HSLV ON (all I/Os except FT_c)(1)(2)(3)(4)

Speed Symbol

Parameter

Conditions

Min

Max

Unit

Fmax

Maximum frequency

CL = 50 pF, 1.58 V ≤ VDDIOx < 2.7 V

MHz

CL = 50 pF, 1.08 V ≤ VDDIOx < 1.58 V

CL = 10 pF, 1.58 V ≤ VDDIOx < 2.7 V

CL = 10 pF, 1.08 V ≤ VDDIOx < 1.58 V

tr/tf

Output rise and fall time

CL = 50 pF, 1.58 V ≤ VDDIOx < 2.7 V

CL = 50 pF, 1.08 V ≤ VDDIOx < 1.58 V

CL = 10 pF, 1.58 V ≤ VDDIOx < 2.7 V

CL = 10 pF, 1.08 V ≤ VDDIOx < 1.58 V

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