Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
Jim Granville
10/08/14 22:33
Read: 840 times

#190359 - What MHz, Vcc, & exact part code ?
Responding to: Oliver Sedlacek's previous message
Oliver Sedlacek said:
The P87C51F DIP in an ancient bit of kit is worryingly close to end of life. Any sugestions for a replacement that will run the same binary? We can change the PCB, so almost any package would be accepatable and we can change the clock (currently 12MHz).

Interesting that NXP show the PLCC and QFP as still in production.
Generally DIP is fading.

Is this a FA/FB device - ie Code/Ram ? Using /12 or /6 clocks ?

Possible replacements could be
Microchip SST89C58RC-40-I-TQJE TQFP, 28,160 in stock
and they also have SST89E/SST89V parts

Of you want to stick with DIP, then Atmel have AT89C51RB2/RC2/RD2 and the newer AT89LP51RB2/RC2/RD2 available in DIP

You may be able to drop in a AT89LP51Rx2, with the right fuse settings.
It would also allow faster operation, should your legacy product need a little boost ?

List of 11 messages in thread
Any suggestions for P87C51F replacement?      Oliver Sedlacek      10/08/14 07:12      
   how critical is ...      Erik Malund      10/08/14 10:47      
   What MHz, Vcc, & exact part code ?      Jim Granville      10/08/14 22:33      
   more info      Oliver Sedlacek      10/10/14 03:51      
      Still no Vcc ?      Jim Granville      10/10/14 16:41      
      what about using an adapter?      Richard Erlacher      10/11/14 12:24      
      5V VCC      Oliver Sedlacek      10/13/14 01:55      
         the rumors of the demise of the '51 are greatly exaggerated      Erik Malund      10/13/14 07:21      
            New 8051's        Jim Granville      10/16/14 15:15      
               RE: New 8051's      Andy Neil      10/22/14 14:30      
                  rejoice      Erik Malund      10/23/14 10:04      

Back to Subject List