drgonzo1969
Well-known member
I was looking for 4 of these MMBF5457 smd for the Electronic Audio Experiments Mu Blaster but mouser and tayda are both out. where are some other sources for SMD componets?
smd mmbf5457 source?
- Thread starter drgonzo1969
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Harry Klippton
Well-known member
Aion maybe? These became real scarce a couple years ago
Laundryroom David
Keyboard Cowboy 🤠
Robert has ‘em in stock
Edit to add link
Edit to add link
fig
Village Idiot
That's the ticket.
drgonzo1969
Well-known member
oh nice! hella convenient. thank you
I just ordered 5 reels from New Jersey Semiconductor, that's the minimum per part number order. (3000pcs per reel) I use them commercially so the cost is what it is. They are not produced by any major silicon fab anymore, but Central Semi and New Jersey Semi both have older fab plants that are still reasonably economical for stuff like this, vs the huge 300+mm wafer fabs overseas now, where a single wafer may make 15,000 JFETS, but they then have to be binned into maybe 25 different part numbers. It was explained to me that the smaller wafer processes made for more consistent JFETS per wafer-like 4-5 part numbers from a process vs the newer, bigger wafers.
That's why when you read original JFET data sheets, they say "Sourced from Process XX", there are a bunch of part numbers sourced from that mask and that process timing and doping, and then the parts are cleaved out and packaged/sorted/binned into the different part numbers. Not sure if they test/sort in the full wafer, or if they package them first, but it all has to happen anyway.
That's why when you read original JFET data sheets, they say "Sourced from Process XX", there are a bunch of part numbers sourced from that mask and that process timing and doping, and then the parts are cleaved out and packaged/sorted/binned into the different part numbers. Not sure if they test/sort in the full wafer, or if they package them first, but it all has to happen anyway.
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