ST72681 datasheet(23/32 Pages) STMICROELECTRONICS

23 / 32 page

ST72681

Electrical characteristics

23/32

Figure 9.

Typical RPU vs. VDD33 with VIN=VSS

Figure 10.

Two typical Applications with unused I/O Pin

7.7.2

Output driving current

Subject to general operating conditions for VDD33, fOSC, and TA unless otherwise specified.

I/Os pullup resistance

2.7

2.8

2.9

3.1

3.2

3.3

3.4

3.5

3.6

Vdd (V)

10k

UNUSED I/O PORT

Device

10k

UNUSED I/O PORT

Device

VDD33

10k

UNUSED I/O PORT

Device

Table 21.

Output driving current

Symbol

Parameter

Conditions

Min.

Max.

Unit

VOL

(1)

The IIO current sunk must always respect the absolute maximum rating specified in Section 7.2.2: Current

characteristics and the sum of IIO (I/O ports and control pins) must not exceed IVSS.

Output low level voltage for a D2 I/O pin when 8

pins are sunk at same time (see Figure 11)

IIO = 2 mA

300

Output low level voltage for a D4 I/O pin when 8

pins are sunk at same time (see Figure 12)

IIO = 4 mA

400

Output low level voltage for a D8 I/O pin when 8

pins are sunk at same time (see Figure 13 )

IIO = 8 mA

500

VDD33-

VOH

(2)

The IIO current sourced must always respect the absolute maximum rating specified in Section 7.2.2:

Current characteristics and the sum of IIO (I/O ports and control pins) must not exceed IVDD33. True open

drain I/O pins do not have VOH.

Output high level voltage for a D2 I/O pin when 8

pins are sourced at same time (see Figure 14)

IIO = 2 mA

600

Output high level voltage for a D4 I/O pin when 8

pins are sourced at same time (see Figure 15 )

IIO = 4 mA

600

Output high level voltage for a D8 I/O pin when 8

pins are sourced at same time (see Figure 16)

IIO = 8 mA

600

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