Support for IBIS Specification

The Ansys Electronics Desktop (AEDT)^TM electronics systems design platform can parse IBIS^® input files, but not all features of the IBIS specification are supported. Some IBIS buffers are available as built-in Nexxim components.

AEDT supports the following features of the IBIS specification:

• Import IBIS library files (.ibs).
• Import IBIS Electrical Board Description files (.ebd); see Importing IBIS EBD Files.
• Convert models for single-ended (not differential) driver and receiver pins to SPICE circuits.
• Extract IV curves on the following and translate into equivalent piece-wise linear devices for SPICE: Pull-up, Pull-down, power and ground clamp devices.
• Extract rise/fall-time information on the IBIS file in order to sequence the pull-up/down devices.
• Read in pin parasitics (RLC elements) and incorporate into models.
• Package models ([Package Model] coupled RLC matrices, .pkg files.)
• Transmitter and receiver analog models from Touchstone files (Note: BIRD158 is provisional. It is not yet approved into the IBIS standard and is subject to change. The Ts4 related parameters that are supported represent everything up to and including revision BIRD 158.7).

The following features of the IBIS specification are not supported:

• Series switch groups
• Submodels of type Bus_hold and Fall_back. Dynamic_clamp IS supported.
• Power/ground pulse tables