HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 408

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

Rev. 0, 07/98, page 392 of 453
Figure 10.24 Reference Levels with No Characteristics Specified
Test point
Input signal reference level
2.0V
0.8V
Figure 10.26 Bus Timing Load 2 (open-drain load)
Figure 10.25 Bus Timing Load 1 (TTL load)
C
2.0V
0.8V
Test point
R
V
CC
R
Diode
V
Output signal reference level
L
CC
1.6 k
90 pF
2.4V
0.8V
R
C = 90 pF
R = 12 k
L
2.4V
0.8V
= 1.6 K