ST72141K datasheet(118/132 Pages) STMICROELECTRONICS

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ST72141K

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10 ELECTRICAL CHARACTERISTICS

10.1 ABSOLUTE MAXIMUM RATINGS

This product contains devices for protecting the in-

puts against damage due to high static voltages,

however it is advisable to take normal precautions

to avoid applying any voltage higher than the

specified maximum rated voltages.

For proper operation it is recommended that VI

and VO be higher than VSS and lower than VDD.

Reliability is enhanced if unused inputs are con-

nected to an appropriate logic voltage level (VDD

or VSS).

Power Considerations. The average chip-junc-

tion temperature, TJ, in Celsius can be obtained

from:

TJ =TA + PD x RthJA

Where:

TA =

Ambient Temperature.

RthJA =Package thermal resistance

(junction-to ambient).

PD =

PINT + PPORT.

PINT =IDD x VDD (chip internal power).

PPORT =Port power dissipation

determined by the user)

Note:

Stresses above those listed as “absolute maximum ratings” may cause permanent damage to the device. This is a stress

rating only and functional operation of the device at these conditions is not implied. Exposure to maximum rating condi-

tions for extended periods may affect device reliability.

General Warning:

Direct connection to VDD or VSS of the RESET and I/O pins could damage the device in case of unintentional internal

reset generation or program counter corruption (due to unwanted change of the I/O configuration). To guarantee safe

conditions, this connection has to be done through a 10K

Ω typical pull-up or pull-down resistor.

Thermal Characteristics

Symbol

Ratings

Value

Unit

VDD - VSS

Supply voltage

6.5

VIN

Input voltage on true open drain pin

VSS - 0.3 to 6.5

Input voltage on any other pin

VSS - 0.3 to VDD + 0.3

VOUT

Output voltage

VSS - 0.3 to VDD + 0.3

ESD

ESD susceptibility

2000

IVDD_i

Total current into VDD_i (source)

IVSS_i

Total current out of VSS_i (sink)

Symbol

Ratings

Value

Unit

RthJA

Package thermal resistance

SO34

SDIP32

°C/W

TJmax

Max. junction temperature

150

°C

TSTG

Storage temperature range

-65 to +150

°C

Power dissipation

500

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