Date: Fri Apr 07 2000 - 13:16:31 PDT
We are using some 484 pin BGA's (FPGA's), which have edge rates of about 170ps.
Using a series termination, it would have to be placed within 1/10 of the
transition length according to Howard Johnson. On FR4, the transition length
would be .98, making the distance from source to termination .098. It is not
possible to get all of the required termination's within that distance.
Aside from slowing down the edges (not desirable), waiting longer for things to
settle, or going with buried resistance, are there any other solutions for
placement of termination's? How are other people terminating large, high pin
**** To unsubscribe from si-list or si-list-digest: send e-mail to firstname.lastname@example.org. In the BODY of message put: UNSUBSCRIBE si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
This archive was generated by hypermail 2b29 : Thu Apr 20 2000 - 11:36:05 PDT