How does Altera® measure lead coplanarity for its devices? - How does Altera® measure lead coplanarity for its devices? Description Lead coplanarity is measured as the distance between the highest and the lowest leads when the device is sitting on an even surface. The maximum lead coplanarity is specified in the Altera Device Package Information Datasheet (PDF). Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']