ST7260 datasheet(87/117 Pages) STMICROELECTRONICS

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ST7260

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13.2 ABSOLUTE MAXIMUM RATINGS

Stresses above those listed as “absolute maxi-

mum ratings” may cause permanent damage to

the device. This is a stress rating only and func-

tional operation of the device under these condi-

tions is not implied. Exposure to maximum rating

conditions for extended periods may affect device

reliability.

13.2.1 Voltage Characteristics

13.2.2 Current Characteristics

Notes:

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

is generated or an unexpected change of the I/O configuration occurs (for example, due to a corrupted program counter).

To guarantee safe operation, this connection has to be done through a pull-up or pull-down resistor (typical: 4.7k

Ω for

RESET, 10k

Ω for I/Os). Unused I/O pins must be tied in the same way to V

DD or VSS according to their reset configuration.

2. IINJ(PIN) must never be exceeded. This is implicitly insured if VIN maximum is respected. If VIN maximum cannot be

respected, the injection current must be limited externally to the IINJ(PIN) value. A positive injection is induced by VIN>VDD

while a negative injection is induced by VIN<VSS. For true open-drain pads, there is no positive injection current, and the

corresponding VIN maximum must always be respected

3. All power (VDD) and ground (VSS) lines must always be connected to the external supply.

4. When several inputs are submitted to a current injection, the maximum

ΣI

INJ(PIN) is the absolute sum of the positive

and negative injected currents (instantaneous values). These results are based on characterization with

ΣI

INJ(PIN) maxi-

mum current injection on four I/O port pins of the device.

5. True open drain I/O port pins do not accept positive injection.

13.2.3 Thermal Characteristics

Symbol

Ratings

Maximum value

Unit

VDD - VSS

Supply voltage

6.0

VIN

1) & 2)

Input voltage on true open drain pins

VSS-0.3 to 6.0

Input voltage on any other pin

VSS-0.3 to VDD+0.3

VESD(HBM)

Electro-static discharge voltage (Human Body Model)

See “Absolute Maximum Ratings

(Electrical Sensitivity)” on page 94.

Symbol

Ratings

Maximum value

Unit

IVDD

Total current into VDD power lines (source)

IVSS

Total current out of VSS ground lines (sink)

IIO

Output current sunk by any standard I/O and control pin

Output current sunk by any high sink I/O pin

Output current source by any I/Os and control pin

- 25

IINJ(PIN)

Injected current on VPP pin

± 5

Injected current on RESET pin

± 5

Injected current on OSCIN and OSCOUT pins

± 5

Injected current on any other pin 4) & 5)

± 5

ΣI

INJ(PIN)

Total injected current (sum of all I/O and control pins) 4)

± 20

IINJ(PIN)

Negative injected current to PB0(10mA)/AIN0 pin

- 80

µA

Symbol

Ratings

Value

Unit

TSTG

Storage temperature range

-65 to +150

°C

Maximum junction temperature: See section 14.2 on page 105 for TJmax

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