Product data

137
Table 22.27 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 Ports 1, 2, 3 I
OL
10 mA
low current (per pin) 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 22.27.
2. When driving a Darlington pair or LED, always insert a current-limiting resistor in the
output line, as show in figures 22.50 and 22.51.
Table 22.27 Permissible Output Currents (cont) – Preliminary –
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 Ports 1, 2, 3 I
OL
——2 mA
low current (per pin) 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 22.27.
2. When driving a Darlington pair or LED, always insert a current-limiting resistor in the
output line, as show in figures 22.50 and 22.51.