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Altera_Forum
Honored Contributor
10 years ago --- Quote Start --- Hi, Anyone know about the maximum current strength supported by pin SDI_HSMC_CLK(input) for SDI HSMC daughter card? In Quartus II Pin Planner, the default current strength of HSMC connector(HSMB_CLK_OUT_P2) to that pin is 12mA, but I have checked the datasheet of the FemtoClock™ Dual VCXO Video PLL (IC 810001-21), the maximum input high current is 150uA. The default current strength exceeds the current value which is stated in the datasheet (attachment), will it damage the IC? Thanks. --- Quote End --- The 12mA drive strength does not necessary mean that the output current will be 12mA. The output current will be largely dependent on the load. You can try to simulate using IBIS model to check the current in your setup.