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

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
05/16/07 21:17
Read: times


 		 #139398 - the problem is...
Responding to: ???'s previous message
Richard said:
Last time I bought SRAM, needing about 2Kx8, I had to buy 32Kx8, which cost about $0.40US for an 8 ns part, but which weren't available in a smaller configuration.

Erik said:

at $0.40 what's the problem? a wild guess would be that a 2k part would cost $0.39

The problem is, that the 2k part does not cost $0.39, but an arm and a leg (if you want it "known good" and not "known pullout"). Also, the problem is the different pinout (OK, as somebody above said, it's not THAT different, but different enough for the headscratching).
Of course this does not matter for a new design, but if you have two dozens of boards you want to keep running...

JW

PS anybody knows where to get decent 68B45s? :-)

List of 27 messages in thread
TopicAuthorDate
replacement for 27C32 EPROM            01/01/70 00:00      
   Package converter?            01/01/70 00:00      
   Why?            01/01/70 00:00      
      To build...            01/01/70 00:00      
         For sale, or hobby use?            01/01/70 00:00      
            hobby use            01/01/70 00:00      
      at $0.40 what's the problem?            01/01/70 00:00      
         the problem is...            01/01/70 00:00      
            There\'s \"free\" IP for those ...            01/01/70 00:00      
         It won't fit the socket.            01/01/70 00:00      
      A common trick            01/01/70 00:00      
   the 24-pin EPROMS...            01/01/70 00:00      
      any memory chip..            01/01/70 00:00      
         it's questionable..            01/01/70 00:00      
         JDEC            01/01/70 00:00      
         How many would you need?            01/01/70 00:00      
            2732s? Without the "C"?            01/01/70 00:00      
               Well, you'd have to raise a supervoltage anyway            01/01/70 00:00      
            Galep-4?            01/01/70 00:00      
               programming spec's for 2732 are in the datasheet            01/01/70 00:00      
                  freightcost            01/01/70 00:00      
                     Paypal's a good option.            01/01/70 00:00      
                     Have you considered a CF + CPLD design?            01/01/70 00:00      
                        CF not yet            01/01/70 00:00      
                           You could focus on using an MCU            01/01/70 00:00      
                              I'll probably do...            01/01/70 00:00      
                                 If you're really loath to use PayPal ...            01/01/70 00:00      

Back to Subject List