5 Feb
2012
5 Feb
'12
7:01 p.m.
Yes, but why not just fit the DIL-packaged version of the IC, which was
clearly available at the time.
I guess it's possible that stocks of the DIL packaged version were in
short supply bu the bare die was easily avaialbe. Still seems like an odd
way to do it.
I made a factual error in my original message. Having re-read the data
sheet, it appears the -A version is a 16 pin package (as is the
similarly-labelled carrier board in this telephone), the -B is an 18 pin
package. The latter has a latch for a handsfree button, using the 2 extra
pins, the former doesn't. The PCN in the telephone could use either.
-tony