Product data

69
Table 22.4 Permissible Output Currents
Conditions: V
CC
= 4.0 V to 5.5 V, V
SS
= 0 V, Ta = –20 to +75°C (regular specifications),
Ta = –40 to +85°C (wide-range specifications)
Item Symbol Min Typ Max Unit
Permissible output
low current (per pin)
SCL1, SCL0, SDA1,
SDA0
I
OL
— — 20 mA
Ports 1, 2, 3 — — 10 mA
Other output pins — — 2 mA
Permissible output Total of ports 1, 2, and 3 ∑ I
OL
— — 80 mA
low current (total)
Total of all output pins,
including the above
— — 120 mA
Permissible output
high current (per pin)
All output pins –I
OH
——2 mA
Permissible output
high current (total)
Total of all output pins ∑ –I
OH
— — 40 mA
Notes: 1. To protect chip reliability, do not exceed the output current values in table 22.4.
2. When driving a Darlington pair or LED, always insert a current-limiting resistor in the
output line, as show in figures 22.1 and 22.2.
Table 22.4 Permissible Output Currents (cont)
Conditions: V
CC
= 2.7 V to 5.5 V, V
SS
= 0 V, Ta = –20 to +75°C
Item Symbol Min Typ Max Unit
Permissible output
low current (per pin)
SCL1, SCL0, SDA1,
SDA0
I
OL
— — 10 mA
Ports 1, 2, 3 — — 2 mA
Other output pins — — 1 mA
Permissible output Total of ports 1, 2, and 3 ∑ I
OL
— — 40 mA
low current (total)
Total of all output pins,
including the above
— — 60 mA
Permissible output
high current (per pin)
All output pins –I
OH
——2 mA
Permissible output
high current (total)
Total of all output pins ∑ –I
OH
— — 30 mA
Notes: 1. To protect chip reliability, do not exceed the output current values in table 22.4.
2. When driving a Darlington pair or LED, always insert a current-limiting resistor in the
output line, as show in figures 22.1 and 22.2.