ST7263B datasheet(110/132 Pages) STMICROELECTRONICS

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ST7263B

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I/O PORT PIN CHARACTERISTICS (Cont’d)

13.8.2 Output Driving Current

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

Notes:

1. The IIO current sunk must always respect the absolute maximum rating specified in Section 13.2 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 13.2 and the sum of IIO

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

Figure 64. Typical VOL at VDD=5V (standard)

Figure 65. Typical VOL at VDD=5V (high-sink)

Symbol

Parameter

Conditions

Min

Max

Unit

VOL

Output low level voltage for a standard I/O pin

when up to 8 pins are sunk at the same time, Port

A0, Port A(3:7), Port C(0:2)

(see Figure 64)

IIO=+1.6mA

0.4

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

when up to 4 pins are sunk at the same time, Port

B(0:7)

(see Figure 65)

IIO=+10mA

1.3

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

pin when up to 2 pins are sunk at the same time,

Port A1, Port A2

IIO=+25mA

1.5

VOH

Output high level voltage for an I/O pin

when up to 8 pins are sourced at same time

(see Figure 66)

IIO=-10mA

VDD-1.3

IIO=-1.6mA

VDD-0.8

0.05

0.1

0.15

0.2

0.25

0.3

1.5

2.5

3.5

Iio (mA)

0.5

1.5

2.5

510

Iio (mA)

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