| General > General Technical Chat |
| Goodbye TO92 bipolars. It's been nice. |
| (1/6) > >> |
| rfclown:
I've been using 2N3906/2N3904 and PN2222/PN2907 since I was a kid (45 years?). Now I go to Digikey/Mouser, and it looks like TO92 bipolars are a thing of the past. 2N3906: obsolete 2N3904: obsolete PN2222: obsolete PN2907: active (relief. I guess I'll design all PNP circuits from now on.) From Mouser I can get 2N3906s from Central Semiconductor if I buy a reel of 2000 and can tolerate an 8 week lead time. At least the SMT versions are available so I can still design with them. But it sure is nice to have the same parts in a leaded package so you can use solderless breadboards to test the circuits first (after simulation of course). |
| ledtester:
Um, I just checked and Mouser USA has 10K ready to ship: https://www.mouser.com/ProductDetail/Central-Semiconductor/2N3906-PBFREE/?qs=u16ybLDytRb9MyqIeMhz0Q%3D%3D |
| rfclown:
--- Quote from: ledtester on January 19, 2021, 04:56:09 am ---Um, I just checked and Mouser USA has 10K ready to ship: ... --- End quote --- From Central Semiconductor. It's sad that ON is obsoleting them. ON bought Fairchild. ON was Motorola. From Central's website: "Central has remained dedicated to manufacturing many other trailing edge devices in legacy packages" |
| bdunham7:
If you like your leads straight, they have 20,000 or so for you. If you want them bent, there's another 40,000 or so, from ON Semi if you must. Central is fine too. https://www.mouser.com/Semiconductors/Discrete-Semiconductors/Transistors/Bipolar-Transistors-BJT/_/N-ax1shZ1yzvvqx?Keyword=2N3906&FS=True&bws=1 Same for your PN2222A. https://www.mouser.com/Semiconductors/Discrete-Semiconductors/Transistors/Bipolar-Transistors-BJT/_/N-ax1shZ1yzvvqx?Keyword=pn2222a&FS=True |
| Siwastaja:
With niche technology, you can't be too picky. Why do you want a specific manufacturer? These parts have multiple good sources. |
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