AN2021 datasheet(33/39 Pages) STMICROELECTRONICS

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AN2021

Electrical characteristics

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Electrical characteristics

Note:

In the tables where the device provides signals with their respective timing characteristics,

the symbol CC (Controller Characteristics) is included in the Symbol column.

In the tables where the external system must provide signals with their respective timing

characteristics to the device, the symbol SR (System Requirement) is included in the

Symbol column.

5.1

DC characteristics

5.1.1

Absolute maximum ratings

They are the same.

5.1.2

Overview of the DC characteristics

The pads of the ST10F272 have been redesigned according to the new technology and

therefore the characteristics are different. The user should verify the DC characteristics.

Table 19 lists the parameters that might be impacted most.

Table 19.

DC characteristics

Symbol

Parameter

ST10F269 Limit values

ST10F272 Limit values

Unit

Min

Max

Min

Max

VIL SR

Input low voltage

(all inputs)

-0.5

0.2 VDD - 0.1

-0.3

0.8

VILSSR

-0.5

2.0, special

threshold

-0.3

0.3 VDD, special

threshold

VIL1SR

Input low voltage

(RSTIN, EA,

NMI, and RPD)

N.A.

-0.3

0.3 VDD

VIL2SR

Input low voltage

(XTAL1 and

XTAL3)

-0.3

0.3 VDD

VIHSR

Input high

voltage

(all except RPD,

XTAL1 and

XTAL3)

0.2 VDD + 0.9

VDD + 0.5

2.0

VDD + 0.3

VIHSSR

0.8 VDD - 0.2

VDD + 0.5,

special threshold

0.7 VDD

VDD + 0.3,

special threshold

HYSCC

Input Hysteresis

N.A.

400, special

threshold

400, default

750, special

threshold

700

1400

VHYS1CC

Input Hysteresis

RSTIN, EA, NMI

750

1400

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