Renesas ZTAT H8S/2357F, Hardware Manual

Page: 761 / 1047

Rev.6.00 Oct.28.2004 page 733 of 1016
REJ09B0138-0600H
Table 22-25 Permissible Output Currents
Conditions: V
CC
= 2.7 to 5.5 V, AV
CC
= 2.7 to 5.5 V, V
ref
= 2.7 to AV
CC
, V
SS
= AV
SS
= 0 V,
T
a
= –20 to +75
°
C (regular specifications), T
a
= –40 to +85
°
C (wide-range specifications)
Item Symbol Min Typ Max Unit
Permissible output Ports 1, A to C I
OL
— — 10 mA
low current (per pin)
Other output pins — — 2.0 mA
Permissible output
low current (total) Total of 32 pins
including ports 1
and A to C
∑
I
OL
— — 80 mA
Total of all output
pins, including the
above — — 120 mA
Permissible output
high current (per pin) All output pins –I
OH
— — 2.0 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 22-25.
2. When driving a darlington pair or LED directly, always insert a current-limiting resistor in the output line, as show
in figures 22-65 and 22-66.
2 k
Ω
The chip
Port
Darlington Pair
Figure 22-65 Darlington Pair Drive Circuit (Example)
600
Ω
The chip
Ports 1, A to C
LED
Figure 22-66 LED Drive Circuit (Example)