STM32U535NET3QTR datasheet(204/278 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32U535xx

204/278

DS14217 Rev 1

Output voltage levels

Unless otherwise specified, the parameters given in the table below are derived from tests

performed under the ambient temperature and supply voltage conditions summarized in

Table 32. All I/Os are CMOS- and TTL-compliant (FT OR TT unless otherwise specified).

Table 92. Output voltage characteristics (all I/Os except FT_c,

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

Symbol

Parameter

Conditions

Min

Max

Unit

VOL

Output low-level voltage

CMOS port(4), |IIO| = 8 mA,

2.7 V ≤ VDDIOx ≤ 3.6 V

-0.4

VOH

Output high-level voltage

VDDIOx - 0.4

VOL(5)

Output low-level voltage

TTL port(4),|IIO| = 8 mA,

2.7 V ≤ VDDIOx ≤ 3.6 V

-0.4

VOH(5)

Output high-level voltage

2.4

VOL(5)

Output low-level voltage

All I/Os, |IIO| = 20 mA,

2.7 V ≤ VDDIOx ≤ 3.6 V

-1.3

VOH(5)

Output high-level voltage

VDDIOx - 1.3

VOL(5)

Output low-level voltage

|IIO| = 4 mA,

1.58 V ≤ VDDIOx ≤ 3.6 V

-0.4

VOH(5)

Output high-level voltage

VDDIOx - 0.4

VOL(5)

Output low-level voltage

|IIO| = 1 mA,

1.08 V ≤ VDDIOx <3.6 V

-0.4

VOH(5)

Output high-level voltage

VDDIOx - 0.4

VOLFM+(5)

Output low-level voltage for

a FT_f I/O pin in FM+ mode

|IIO| = 20 mA,

2.7 V ≤ VDDIOx ≤ 3.6 V

-0.4

|IIO| = 10 mA,

1.58 V ≤ VDDIOx ≤ 3.6 V

-0.4

|IIO| = 2 mA,

1.08 V ≤ VDDIOx < 3.6 V

-0.4

1. FT_t I/O characteristics are degraded only in VBAT mode (refer to Table 93).

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 IIO current sourced or sunk by the device must always respect the absolute maximum rating specified in Table 30:

Current 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.

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

5. Specified by design. Not tested in production.

Table 93. Output voltage characteristics for FT_t I/Os in VBAT mode, and for FT_o I/Os(1)

Symbol

Parameter

Conditions

Min

Max

Unit

VOL

Output low-level voltage |I

IO| = 0.5 mA, 2.7 V ≤ VBAT ≤ 3.6 V,

VDD off

-0.4

VOH

Output high-level voltage

VDDIOx - 0.4

VOL

Output low-level voltage |I

IO| = 0.25 mA, 1.58 V ≤ VBAT ≤ 3.6 V,

VDD off

-0.4

VOH

Output high-level voltage

VDDIOx - 0.4

1. Specified by design. Not tested in production.

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