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???
05/17/07 05:04
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 		 #139419 - Well, you'd have to raise a supervoltage anyway
Responding to: ???'s previous message
Yes, IIRC, these like to see a 25-volt Vpp.

I don't think the 'C' version was much better ... wasnt' its Vpp 21 volts?

I had a few 27C32's some years back, but they were begged away. I still have quite a lot of standard TTL, too.

I find it interesting that some functions available in standard and 'L' ttl never became popular in LS or S varieties. Tristate counters, for example, might have saved a lot of multiplexers in the DRAM days. I occasionally used the NSC 85L54's. They're 16-pin tristate 4-bit presettable synchronous binary counters.

RE




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      

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