ST72682 datasheet(25/36 Pages) STMICROELECTRONICS

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ST72682

Electrical characteristics

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7.7

I/O port pin characteristics

7.7.1

General characteristics

Subject to general operating conditions for VDD33, fOSC, and TA unless otherwise specified.

Figure 8.

Two typical applications with unused I/O pin

Table 19.

Electrical sensitivities

Symbol

Parameter

Conditions

Class(1)

Class description: A Class is an STMicroelectronics internal specification. All its limits are higher than the

JEDEC specifications, that means when a device belongs to Class A it exceeds the JEDEC standard. B

Class strictly covers all the JEDEC criteria (international standard).

Static latch-up class

TA=+25 °C

DLU

Dynamic latch-up class

VDD33=3.3 V, fOSC=12 MHz,

TA=+25 °C

Table 20.

I/O port characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIL

Input low level voltage(1)

TTL ports

0.16VDD33

VIH

Input high level voltage(1)

0.85VDD33

Vhys

Schmitt trigger voltage

hysteresis(2)

400

Input leakage current

VSS ≤ VIN ≤ VDD33,

standard I/Os

1µA

RPU

Weak pull-up equivalent

resistor(1)

VIN=VSS VDD33= 3.3 V

Ω

The RPU pull-up equivalent resistor is based on a resistive transistor. This data is based on characterization results, tested

in production at VDD33 max.

Hysteresis voltage between Schmitt trigger switching levels. Based on characterization results, not tested in production.

10k

Ω

UNUSED I/O PORT

Device

10k

Ω

UNUSED I/O PORT

Device

VDD33

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