Abstract: Integrated circuit devices, methods, and circuitry are provided for performing timing analysis for chip-to-chip connections between integrated circuits in a multichip package. A system may include an integrated circuit package and a computing system. The integrated circuit package may have a first integrated circuit connected to a second integrated circuit via a chip-to-chip connection. The chip-to-chip connection may also be connected to a package ball. The computing system may perform timing analysis on a circuit design for the first integrated circuit with respect the chip-to-chip connection based on user-specified parasitic data relating to the connection to the package ball.