2716 with 100 nS access time ?

[Don North]

woodelf wrote:
> Jos Dreesen / Marian Capel wrote:
>> I need a programmable device, with the standard 24 pin layout, with 
>> 100nS acces time.
>> 2716's are 350ns to 450ns, 2816's are 150nS match.
>> What other options do I have ?
>>
>> ( Target : replace some bipolar microcode proms So I can experiment a 
>> bit)
>
> You just can't replace bipolar proms. :(
>>             Jos
>>
>

Look around for Cypress CY7C264 parts in the wide 24p package (they
come in both 600mil wide and 300mil skinny DIPs). They offer access
times down to 45-55ns and are 8Kx8 devices. Pins 18-21 are a little
different versus the 2716 (since it requires more address lines) but
all the other pins are identical. Most likely in can just drop in your
circuit as is (you just need to program multiple instances of your
2716 code into the device to alias the unused upper address lines).

These are UV eraseable devices so they can be easily reprogrammed.

Don
AK6DN