ST72334J datasheet(105/125 Pages) STMICROELECTRONICS

105 / 125 page

ST72334J/N, ST72314J/N, ST72124J

105/125

8 ELECTRICAL CHARACTERISTICS

8.1 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 xVDD (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 under these conditions is not implied. Exposure to maximum rating con-

ditions for extended periods may affect device reliability.

General Warning:

Directly connecting the RESET and I/O pins to VDD or VSS could damage the device if an unintentional internal reset is

generated or the program counter is corrupted (by an expected change to the I/O configuration). To guarantee safe op-

eration, this connection has to be done through a pull-up or pull-down resistor (10K

Ω typical).

Thermal Characteristics

Symbol

Ratings

Value

Unit

VDD -VSS

Supply voltage

6.5

VDDA -VSSA

Analog reference voltage

VDDA >VSS

6.5

|VDD_i -VDD_j|

|VDD_i -VDDA|

Max. variations (power line)

|VSS_i -VSS_j|

|VSS_i -VSSA|

Max. variations (ground line)

VIN

Input voltage

VSS - 0.3 to VDD + 0.3

VOUT

Output voltage

SS - 0.3 to VDD + 0.3

ESD

ESD susceptibility

2000

IVDD_i

Total current into VDD_i (source)

150

IVSS_i

Total current out of VSS_i (sink)

150

Symbol

Ratings

Value

Unit

RthJA

Package thermal resistance

TQFP64

SDIP56

TQFP44

SDIP42

TBD

°C/W

TJmax

Max. junction temperature

150

°C

TSTG

Storage temperature range

-65 to +150

°C

Power dissipation

500

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