21 Jul
2016
21 Jul
'16
6:20 p.m.
On 07/21/2016 04:56 PM, Paul Koning wrote:
PLCCs have fairly limited lead counts; they were
common for 44 lead
packages, and perhaps a bit more.
I"ve probably got more 68 pin PLCCs than anything else; I've got various
ICs in 84 pin PLCC, including a some CPLDs and CPUs (e.g., 80C188EB).
The convenient part is that sockets are available to provide a
convenient 0.010" pin spacing by translating one row of pins to two and
removal/insertion is simple. Probing for signals is likewise
straightforward. After that you have to go to QFP/BGA (not terribly
socket-able) or PGA. High pin-count packages are pretty large, however.
--Chuck