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This is one of the reasons I do not bother looking for NOS or exact replacement semiconductors.
CPV-2N :: Item Details :: Chip Form: Amplifier/Switch Transistor :: Central Semiconductor
I would not bother with an exact replacement because it is operating as a simple emitter follower. I did this for the 2N and found them to be identical between and so I would assume Fairchild is either still using process 23 or they never updated the documentation. My sources are of an anecdotal nature, so I mostly consider them as indications I should do my own tests.
This cannot be undone. I checked that and it is the reason that I did not also recommend the 2N or 2N although I suspect both would work fine without adjusting the circuit. The BC3x7 series typically has low internal base resistance which is why it’s not very noisy. Often the only difference between premium parts and others is testing time and grading. Thursday, October 31, 9: What are the odds that Fairchild is still using anything approximating NS Process 12?
On 01 Nov If just an emitter follower would do, I don’t expect there would have been a Q I have often had to qualify parts by manufacturer. You can save a lot of money or grief finding special parts if you grade them yourself. Robert Pease wrote that he kept a collection of “worst case” transistors for testing circuits. I’m very hesitant to use this part number in any design for that reason, as it’s likely builders will just use whatever is available at the cheapest cost. Click to view availability.
2N NTE Equivalent NTE PNP audio amplfier tr – Wholesale Electronics
In order to datahseet serve you, we have created a new web based request system. Many other small-signal transistors are noisier, yet they are advertised as low-noise and the BC3x7 are not. The BD is a transistor which almost every manufacturer seems to have their own different datasheet for, so if it’s a critical part, sometimes you have to know the manufacturer and not just the part number.
How can we help you? Datashet know this kind of thing happens. If your ATE can only measure leakage down to 50 or nanoamps common values in the allotted time, then that becomes your guaranteed maximum specification.
2N3251 Datasheet, Equivalent, Cross Reference Search
When I worked at Tek Wilsonville in the 80’s, in a back corner by the copier there was a big machine loaded with thousands of “window cards”, the size of IBM punch cards with a “window” of microfiche. I wish this kind of information was unambiguously available for modern parts. In order 22n3251 better serve you, please access the online inquiry system. On Sat, 2 Nov See TNA for characteristics.
On Thu, 31 Oct A 2N from anyone else was NOT a I doubt Tektronix was pushing the edge so much as just running their own quality control program on incoming parts. The characteristic curves for old parts and new parts like the 2N could be compared to see if the processes was changed but that will not be reliable if newer dxtasheet data was not updated to reflect changes.
At any rate, do compare datasheets between manufacturers. Very few people are willing to carry out conclusive tests, and few of these are willing to post anything online. The Fairchild and OnSemi specifications are otherwise identical.
A BC is going to be a little slow. A Central sales representative will confirm the availability of the plating type requested. Even with the same manufacturer, a part may be moved to a new process changing its unguaranteed characteristics significantly.