STM32L552CEU6PTR datasheet(233/340 Pages) STMICROELECTRONICS

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DS12737 Rev 6

233/340

STM32L552xx

Electrical characteristics

307

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 41 and

Table 104, respectively.

Unless otherwise specified, the parameters given are derived from tests performed under

the ambient temperature and supply voltage conditions summarized in Table 27: General

operating conditions.

Table 103. Output voltage characteristics(1)

Symbol

Parameter

Conditions

Min

Max

Unit

VOL

Output low level voltage for

an I/O pin

CMOS port(2)

|IIO| = 2 mA for FT_c

|IIO| = 8 mA for other I/Os

VDDIOx ≥ 2.7 V

-0.4

VOH

Output high level voltage for

an I/O pin

VDDIOx-0.4

VOL(3)

Output low level voltage for

an I/O pin

TTL port(2)

|IIO| = 2 mA for FT_c

|IIO|= 8 mA for other I/Os

VDDIOx ≥ 2.7 V

-0.4

VOH(3)

Output high level voltage for

an I/O pin

2.4

VOL(3)

Output low level voltage for

an I/O pin

All I/Os except FT_c

|IIO| = 20 mA

VDDIOx ≥ 2.7 V

-1.3

VOH(3)

Output high level voltage for

an I/O pin

VDDIOx-1.3

VOL(3)

Output low level voltage for

an I/O pin

|IIO| = 1 mA for FT_c

|IIO| = 4 mA for other I/Os

1.62 V ≤ VDDIOx ≤ 3.6 V

-0.4

VOH(3)

Output high level voltage for

an I/O pin

VDDIOx-0.45

VOL(3)

Output low level voltage for

an I/O pin

|IIO| = 1 mA for FT_c

|IIO| = 2 mA for other I/Os

1.08 V ≤ VDDIOx < 1.62 V

0.35 ₓ

VDDIOx

VOH(3)

Output high level voltage for

an I/O pin

0.65ₓVDDIOx

VOLFM+

(3)

Output low level voltage for

an FT I/O pin in FM+ mode

(FT I/O with "f" option)

|IIO| = 20 mA

VDDIOx ≥ 2.7 V

-0.4

|IIO| = 10 mA

1.62 V ≤ VDDIOx ≤ 3.6 V

-0.4

|IIO| = 2 mA

1.08 V ≤ VDDIOx < 1.62 V

-0.4

1. The IIO current sourced or sunk by the device must always respect the absolute maximum rating specified in Table 24:

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.

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