ST72F321 datasheet(157/189 Pages) STMICROELECTRONICS

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ST72321

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I/O PORT PIN CHARACTERISTICS (Cont’d)

12.8.2 Output Driving Current

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

Figure 83. Typical VOL at VDD=5V (standard)

Figure 84. Typical VOL at VDD=5V (high-sink)

Figure 85. Typical VOH at VDD=5V

Notes:

1. The IIO current sunk must always respect the absolute maximum rating specified in Section 12.2.2 and the sum of IIO

(I/O ports and control pins) must not exceed IVSS.

2. The IIO current sourced must always respect the absolute maximum rating specified in Section 12.2.2 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.

Symbol

Parameter

Conditions

Min

Max

Unit

VOL

Output low level voltage for a standard I/O pin

when 8 pins are sunk at same time

(see Figure 83)

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 84 and Figure 86)

IIO=+20mA, TA≤85°C

TA≥85°C

1.3

1.5

IIO=+8mA

0.6

VOH

Output high level voltage for an I/O pin

when 4 pins are sourced at same time

(see Figure 85 and Figure 88)

IIO=-5mA, TA≤85°C

TA≥85°C

VDD-1.4

VDD-1.6

IIO=-2mA

VDD-0.7

0.2

0.4

0.6

0.8

1.2

1.4

0.005

0.01

0.015

Iio(A )

Ta =14 0°C "

Ta =95 °C

Ta =25 °C

Ta =-45 °C

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

0.01

0.02

0.03

Iio(A)

Ta= 140 °C

Ta= 95 °C

Ta= 25 °C

Ta= -45°C

2.5

3.5

4.5

5.5

-0.01

-0.008

-0.006

-0.004

-0.002

V dd= 5V 1 40°C m in

V dd= 5v 95°C m in

V dd= 5v 25°C m in

V dd= 5v -4 5°C m in

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