How many sets of I/V data should I have in an IBIS model if the I/O buffer is an open-drain buffer? - How many sets of I/V data should I have in an IBIS model if the I/O buffer is an open-drain buffer? Description Open-drain or open-collector buffers only require three sets of I/V data, which are [Pulldown], [GND Clamp] and [POWER Clamp]. [Pullup] data can be omitted since the current data in the [Pullup] table are all zeros. Related Articles How can I simulate open drain outputs using IBIS models? Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']