Table 20-7 Allowable Output Current Values (2.7-V S-Mask Versions)
–Preliminary–
Conditions: V
CC
= 2.7 to 5.5 V, V
SS
= AV
SS
= 0 V, T
a
= –20 to +75C (Regular Specifications),
AV
CC
= 2.7 to 5.5 V
*1
Item
Allowable output
Low current (per pin)
Symbol
I
OL
Min
–
–
–
–
–
–
Typ
–
–
–
–
–
–
Max
10
3.0
2.0
40
80
2.0
Unit
mA
mA
mA
mA
mA
mA
Port 4
RES
Other output pins
Port 4, total of 8 pins
Total of all output pins
All output pins
Σ
I
OL
Allowable output
High current (per pin)
Allowable output
High current (total)
Note:
*
1 To avoid degrading the reliability of the chip, be careful not to exceed the output current
sink values in table 20-5. In particular, when driving a Darlington transistor pair or LED
directly, be sure to insert a current-limiting resistor in the output path. See figures 20-1
and 20-2.
–I
OH
Total of all output pins
Σ
–I
OH
–
–
25
mA
The S-mask versions (high-speed and low-voltage versions) are identical to the existing R-mask
versions functionally and in their pin arrangement. Due to the higher-speed design, however, there
are differences in the fabrication process, which lead to some differences in electrical
specifications, operating margin, noise margin, and other characteristics. These differences should
be noted during board design, and when switching from an R-mask to an S-mask version.
–Preliminary–
Allowable output
Low current (total)
H8/534
H8/536
Port
2 k
Darlington pair
H8/534
H8/536
Port 4
600
LED
V
CC
Figure 20-1 Example of Circuit for Driving a
Darlington Transistor Pair
Figure 20-2 Example of Circuit for Driving
an LED
339