Parts, parts, parts...

A project log for YGRECmos

The YGREC architecture, this time implemented in CMOS

Yann Guidon / YGDESYann Guidon / YGDES 06/16/2017 at 22:080 Comments

I received the 74HC181, 74HC182 in record time from deivic ! The same day the 74HC259 arrived too !

I must dig the project boxes of the #Discrete YASEP to find all the necessary 74HC251, 74HC253, 74HC193 and others I need for this processor. It's fortunate I always purchase extra parts "because you never know !"

After some "inventorumaging" I have found, in DIP:

I expected to use 50×'251...

2 possibilities:

Now if I could find a SMD version of the 74HC181, I could almost make a full-SOIC version later :-D however this looks unavailable... I have a bunch of HC283 in SOIC though but that might not cut it, more MUXes will be needed...

Luckily, the last local electronics parts store in Paris still has some HC parts so I could fill the BOM. I have enough 151 and 251 for a DIP prototype, I added some '154 for decoding the DIP switch array. So I guess it's GO :-)