26 May
2006
26 May
'06
3:06 p.m.
On 5/26/2006 at 12:18 PM Holger Veit wrote:
typically, the -2 means 2MHz for other manufacturers,
and since there
appears to be a 82c55AP-3 and AP-5 available as out-of-stock part, I
suspect
that the -2 also means 2MHz for Mitsubishi. So you
likely got a 2MHz part.
Fortunately, 82c55-5 chips are not so rare (see
unicornelectronics, for
instance).
Since I was in the same position a couple of months ago, there is a glaring
exception to this: NEC.
The uPD 8255AC-2 is rated at 5 MHz and the 8255AC-5 is rated at (ready for
this?) 4 Mhz!
Cheers,
Chuck