[sdiy] Another new hard to find part....

[Ingo Debus]

Am Montag, 05.07.04 um 06:59 Uhr schrieb James Patchell:

> Recreating the 74HC283 with "discrete" circuitry, while an interesting 
> exercise, would be problematic...i.e...way too many parts.  I could 
> recreate the functionality with a CPLD, like say a Xilinx XC9536

The 74283 could probably be recreated with a "simple" PLD like the 
22V10 too. I haven't investigated if it's really possible, perhaps it's 
necessary to generate the "internal carry" with an extra product term, 
so the PLD would probably be slower than the original. Of course it's 
not pin-compatible, since the 74283 has 16 pins.
Isn't there even a "in-system-programmable" version of the 22V10 
available that requires no programming hardware?

Ingo