ST72321R7-Auto datasheet(187/243 Pages) STMICROELECTRONICS

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ST72321xx-Auto

Electrical characteristics

Doc ID 13829 Rev 1

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19.2.2

Current characteristics

19.2.3

Thermal characteristics

Table 105.

Current characteristics

Symbol

Ratings

Maximum value

Unit

IVDD

Total current into VDD power lines (source)

(1)

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

150

IVSS

Total current out of VSS ground lines (sink)

(1)

IIO

(2)

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

 for RESET, 10k for I/Os). For the same reason, unused I/O pins must

not be directly tied to VDD or VSS.

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)

(3)(4)

IINJ(PIN) must never be exceeded. This is implicitly ensured 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.

Negative injection may disturb the analog performance of the device. See Note 1 in Table 136: ADC

accuracy on page 219.

Injected current on VPP pin

± 5

Injected current on RESET pin

± 5

Injected current on OSC1 and OSC2 pins

± 5

Injected current on PC6 pin (Flash devices only)

+ 5

Injected current on any other pin(5)(6)

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

I

INJ(PIN) is the absolute sum of the

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

characterization with

I

INJ(PIN) maximum current injection on four I/O port pins of the device.

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

± 5

I

INJ(PIN)

(3)

Total injected current (sum of all I/O and control pins)(5)

± 25

Table 106.

Thermal characteristics

Symbol

Ratings

Value

Unit

TSTG

Storage temperature range

-65 to +150

°C

Maximum junction temperature (see Section 20.1: Thermal characteristics on page 222)

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