[FAQ] AM625: Package parameter description

Hello Ceydem

Thank you for the query.

Let me verify and comeback.

Regards,

Sreenivasa

Hello Ceyden

Please refer below inputs i received.

1. 0.35, 0.25 – “The ball diameter as measured in a plane parallel to the seating plane, Datum C. The measured value of each ball is the largest such diameter for that ball. The measured values shall lie within the ranges specified for each pitch.”
2. 0.15 (eee) – “The tolerance of position that controls the location of the pattern of balls with respect to Datum's A and B. For each ball there is a cylindrical tolerance zone eee perpendicular to datum C and located on true position with respect to Datum's A and B as defined by e and Sx. The axis perpendicular to Datum C of each ball must lie within this tolerance zone.”
3. 0.08 (fff) – “The tolerance of position that controls the location of the balls within the matrix with respect to each other. For each ball there is a cylindrical tolerance zone fff perpendicular to Datum C and located on true position as defined by e. The axis perpendicular to Datum C of each ball must lie within this tolerance zone. Each tolerance zone fff in the array is contained entirely in the respective tolerance zone eee above. The axis of each ball must lie simultaneously in both tolerance zones”

Jedec reference 

JEDEC PUBLICATION 95 (JEP95)
DESIGN REGISTRATION 4.14

Regards,

Sreenivasa

Hi All, 

Additional information:

AM623: LPDDR4 Padstack size

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1356111/faq-am623-lpddr4-padstack-size

Regards,

Sreenivasa