24 Nov
1998
24 Nov
'98
11:23 p.m.
On the topic of Elf99 I/O, several people wrote:
Which is cheapest is the easy answer - the dual 4508 latches. Between
buffers, latches, etc, it's much less than $5 cost. The 1851 costs over
$10, dual 1852 I/O chips (another suggestion) are about $5 or $6 each.
The question is, is the flexibility (and possible scareness in the future)
worth $10 on the final cost?
-ethan
<o A 1851
programmable input/output port -or- a pair of 4508 latches
Use the one that is available.
I think it my come down to a cost issue to offset the high cost of some
other parts perhaps. Use whatever's cheapest.