Burn-In Sockets > 1 - Burn-in Sockets for BGA - Bumped chip - WLCSP - eMMC Package > eMMC Package > Pitch from 0.50mm to 0.79mm > 
How to connect the Burn-in Socket to your PCB?
You can find here down the available options for your already selected pitch.
PLEASE SELECT THE PCB MOUTING SOLUTION FOR YOUR FUTURE SOCKET :
