STM32L021D4 datasheet(77/114 Pages) STMICROELECTRONICS

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STM32L021x4

Electrical characteristics

Output voltage levels

Unless otherwise specified, the parameters given in Table 50 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 17. All I/Os are CMOS and TTL compliant.

Table 50. Output voltage characteristics

Symbol

Parameter

Conditions

Min

Max

Unit

VOL(1)

1. The IIO current sunk by the device must always respect the absolute maximum rating specified in Table 15.

The sum of the currents sunk by all the I/Os (I/O ports and control pins) must always be respected and

must not exceed ΣIIO(PIN).

Output low level voltage for an I/O

CMOS port(2),

IIO = +8 mA

2.7 V ≤ VDD ≤ 3.6 V

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

-0.4

VOH(3)

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

Table 15. The sum of the currents sourced by all the I/Os (I/O ports and control pins) must always be

respected and must not exceed ΣIIO(PIN).

Output high level voltage for an I/O

VDD-0.4

VOL (1)

Output low level voltage for an I/O

TTL port(2),

IIO =+ 8 mA

2.7 V ≤ VDD ≤ 3.6 V

-0.4

VOH (3)(4)

4. Guaranteed by characterization results, not tested in production.

Output high level voltage for an I/O

TTL port(2),

IIO = -6 mA

2.7 V ≤ VDD ≤ 3.6 V

2.4

VOL(1)(4)

Output low level voltage for an I/O

IIO = +15 mA

2.7 V ≤ VDD ≤ 3.6 V

-1.3

VOH(3)(4)

Output high level voltage for an I/O

IIO = -15 mA

2.7 V ≤ VDD ≤ 3.6 V

VDD-1.3

VOL(1)(4)

Output low level voltage for an I/O

IIO = +4 mA

1.65 V ≤ VDD < 3.6 V

-0.45

VOH(3)(4)

Output high level voltage for an I/O

IIO = -4 mA

1.65 V ≤ VDD ≤ 3.6 V

VDD-0.45

VOLFM+(1)(4)

Output low level voltage for an FTf

I/O pin in Fm+ mode

IIO = 20 mA

2.7 V ≤ VDD ≤ 3.6 V

-0.4

IIO = 10 mA

1.65 V ≤ VDD ≤ 3.6 V

-0.4

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