ST72325AR7-Auto datasheet(207/243 Pages) STMICROELECTRONICS

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ST72325xxx-Auto

Electrical characteristics

Doc ID 13770 Rev 3

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19.8.2

Output driving current

Subject to general operating conditions for VDD, fCPU, and TA unless otherwise specified.

Figure 80.

Unused I/O pins configured as

input

Figure 81.

Typical IPU vs VDD with VIN =VSS

10k



ST7XXX

10k



UNUSED I/O PORT

ST7XXX

VDD

Note: I/O can be left unconnected if it is configured as output

greater EMC robustness and lower cost.

(0 or 1) by the software. This has the advantage of

UNUSED I/O PORT

2.5

3.5

4.5

5.5

Vdd(V)

Ta=140°C

Ta=95°C

Ta=25°C

Ta=-45°C

Table 129.

Output driving current

Symbol

Parameter

Conditions

Min

Max

Unit

VOL

(1)

Output low level voltage for a standard I/O pin

when 8 pins are sunk at same time

(see Figure 82)

VDD =5V

IIO =+5mA

1.2

IIO =+2mA

0.5

Output low level voltage for a high sink I/O pin

when 4 pins are sunk at same time

(see Figure 83 and Figure 85)

IIO = +20mA,

TA < 85°C

TA > 85°C

1.3

1.5

IIO =+8mA

0.6

VOH

(2)

Output high level voltage for an I/O pin

when 4 pins are sourced at same time

(see Figure 84 and Figure 87)

IIO =-5mA,

TA < 85°C

TA > 85°C

VDD -1.4

VDD -1.6

IIO =-2mA

VDD -0.7

The IIO current sunk must always respect the absolute maximum rating specified in Section 19.2.2 and the sum of IIO (I/O

ports and control pins) must not exceed IVSS.

The IIO current sourced must always respect the absolute maximum rating specified in Section 19.2.2 and the sum of IIO

(I/O ports and control pins) must not exceed IVDD. True open-drain I/O pins do not have VOH.

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