On-Chip Communication Architectures

408 CHAPTER 11 Physical Design Trends for Interconnects

time is a lower limit on the line length, making shorter on-chip interconnects

behave inductively. As a consequence, medium length lines can also behave induc-

tively at high signal frequencies.

In addition to frequency considerations in determining whether to include

inductance in an interconnect model, the length of the line must also be consid-

ered. Since the time of fl ight along the interconnect is dependent on the length of

the line, longer lines increase the likelihood of requiring inductance in an inter-

connect model. The line inductance should therefore be considered in high speed, ...