HD6475348R Datasheet, PDF (350/487 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

Table 20-7 Allowable Output Current Values (2.7-V S-Mask Versions)
–Preliminary–
Conditions: VCC = 2.7 to 5.5 V, VSS = AVSS = 0 V, Ta = –20 to +75˚C (Regular Specifications),
AVCC = 2.7 to 5.5 V^*1
Item
Symbol Min Typ Max Unit
Allowable output
Low current (per pin)
Port 4
RES
IOL
–
–
10
mA
–
–
3.0
mA
Other output pins
–
–
2.0
mA
Allowable output
Low current (total)
Port 4, total of 8 pins Σ IOL
Total of all output pins
–
–
40
mA
–
–
80
mA
Allowable output
All output pins
High current (per pin)
–IOH
–
–
2.0
mA
Allowable output
Total of all output pins Σ –IOH
–
–
25
mA
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.
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–
H8/534
H8/536
Port
2 kΩ
Darlington pair
H8/534
H8/536
VCC
600Ω
Port 4
LED
Figure 20-1 Example of Circuit for Driving a Figure 20-2 Example of Circuit for Driving
Darlington Transistor Pair
an LED
339