How much negative current can a FPGA Cyclone II user pins I/O can drive ? Sum of pin currents

Question

Hi.
How much negative current can a FPGA Cyclone II pin I/O can drive ?
I see on documentation that one I/O user pin can drive -24mA.
But what about the sum of all negative current currents allowed ?
Documentation says that maximum current strength of {8 pins Top and Bottom} or {12 pins side} must not exceed 240mA. That is for positive current. But what about negative currents ?
Best regards.

amint_intel · Answer

Hello,

May I know which document are you referring to about I/O pin that can drive -24mA?

Thanks

mmoussea · Answer

hi, on https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyc2/cyc2_cii5v1.pdf
table 5-1 "Absolute maximum rating" : -25mA
On https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyc2/cyc2_cii51010.pdf
Programmable current strength : 24mA by default.
My end prupose is that my pins currently drive down to 0V {one resistor,  one LED in serial to 3.3V} and wonder if FPGA Cylone II pins can drive -7 mA.

amint_intel · Answer

Hello,

Are you referring to -25mA minimum on Iout on Table 5-1? If that is the one you are referring to you cannot set it below -25mA since it may cause permanent damage to your device.

Thank you.

mmoussea · Answer

Hello.
I may ask differently :
Can I drive -7mA per pin (current flow into an output pin), not exceeding -240mA per 8 or 12 pins (depends of banks) ?

Best regards.

amint_intel · Answer

Hello,

Yes, absolutely!

Thanks

Forum Discussion

How much negative current can a FPGA Cyclone II user pins I/O can drive ? Sum of pin currents

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