Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

How can i use LVDS pins which are not on the edge

Hi,i'm using EP3C55F484.To connect with high speed adc,I need 24 pairs LVDS pins as receiver.The bank 5 and 6 is used. Now i'm placeing 100 Ohms terminal resistance around these LVDS pins.However...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

You can place the terminating resistors in 'fly by', i.e. route the signals to the pins of the bga and then continue the routing further to the resistor, you may need an extra layer in the PCB for this.

Another possibility is to use the small 0402 size of resistors, with a bit of arranging they fit between the vias used to connect the bga pins.