Si533xx Current Consumption vs Frequency

by <a href=""><font color="#000000"><font size="2">Hero Employee</font></font> </a> FranBoudreau on ‎11-06-2014 02:53 PM


The Si533xx data sheet shows current consumption at a given frequency, what is it at other frequencies?



The IDDOA and IDDOB current consumption is consistent over the operating range of output frequencies for the differential outputs; LVPECL, LPPECL, LVDS, HCSL and CML. The current listed in the data sheet should be used for any valid frequency.


IDDOA/B current consumption does depend on frequency for CMOS output operation, below shows how IDDOx current changes with frequency.


The legends show the Output logic, drive strength and supply voltage. As an example CMOS-24-3.3V is a CMOS output, 24mA drive and 3.3V operation. The drive current is per output.


The IDD current has minimal change vs frequency as follows