stupied,bad eyes or else

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duikkie
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stupied,bad eyes or else

Post by duikkie » Fri Dec 30, 2016 2:00 am

Oke still playing with to small /little parts for psu

Can anyone tell me why a tansistor like

2SD2120 on the part it self is printed

D2120
2C

i looked at other trandistors but all are 2C and not 2S ?

Allso the name of the factory or symbol is a puzzle

TI is not texas instuments but UN is ??

Any table or side or google term to look for labels ??

poink
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Re: stupied,bad eyes or else

Post by poink » Fri Dec 30, 2016 2:38 am

duikkie wrote:D2120
2C
the first two indicate the material and type of device. 2 is silicon, C is low frequency+low power, S is low power switching. The D2120 is the actual number for the device with of the given material and type.
duikkie wrote:TI is not texas instuments but UN is ??
Purely guessing, TI might use Sn, because they're Texas Instruments.

A lot of this is because one company bought another, and continued to use that code for products in that category. TI is old enough that they've bought a lot of companies; for instance Burr-Brown, Luminary Micro (who are why TI's ARM microcontrollers are 'LM') and recently National Semiconductor. (I doubt it's an acquisition in the case of SN - 74 series logic was created by TI)

List of prefixes, by no means complete: http://www.interfacebus.com/logic_prefix.html

duikkie
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Re: stupied,bad eyes or else

Post by duikkie » Fri Dec 30, 2016 12:25 pm

i have mailed Texas Instruments if they ever had transistor labeled TI8231 or TI8406, the answer was NO :(

if you google on 2CD2120 you will not find the datasheet but 2SC2120 is the datasheet

i have allways a fight with google D2120 gives a lot of hits :(, and they think they are helping me , dame GOOGLE [-X
poink wrote:
duikkie wrote:D2120
2C
the first two indicate the material and type of device. 2 is silicon, C is low frequency+low power, S is low power switching. The D2120 is the actual number for the device with of the given material and type.
duikkie wrote:TI is not texas instuments but UN is ??
Purely guessing, TI might use Sn, because they're Texas Instruments.

A lot of this is because one company bought another, and continued to use that code for products in that category. TI is old enough that they've bought a lot of companies; for instance Burr-Brown, Luminary Micro (who are why TI's ARM microcontrollers are 'LM') and recently National Semiconductor. (I doubt it's an acquisition in the case of SN - 74 series logic was created by TI)

List of prefixes, by no means complete: http://www.interfacebus.com/logic_prefix.html

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1024MAK
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Re: stupied,bad eyes or else

Post by 1024MAK » Fri Dec 30, 2016 2:23 pm

These may or may not help...

http://how-to.wikia.com/wiki/Howto_iden ... _logos/A-E
https://en.m.wikibooks.org/wiki/Practic ... ers_Prefix
http://www.interfacebus.com/logic_prefix.html
https://en.wikichip.org/wiki/manufacturer_prefix

Also, not all the type number will be shown. And not all data sheets are on the internet. Before the Internet, transistor data was in data books, and some transistors did not even get a page, just part of a tabulated listing. As there are thousands of different transistors, it does not surprise me that you can't find data for it. If you have access to a large book library see if they can get one of the transistor data books that has data on thousands of transistors.

Mark

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1024MAK
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Re: stupied,bad eyes or else

Post by 1024MAK » Fri Dec 30, 2016 2:30 pm

There are THREE code systems for diodes, transistor and other two, three or four pin devices, plus some companies use their own 'house' coding systems...

This PDF may help: http://www.elexp.com/Images/Reading_Tra ... rkings.pdf.

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duikkie
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Re: stupied,bad eyes or else

Post by duikkie » Fri Dec 30, 2016 4:58 pm

"TIP: Texas Instruments (TI) power transistor, plastic case"

so why not TI8231 or TI8406 by Texas Instruments ? (TI)P is for power normal then TI ??

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Re: stupied,bad eyes or else

Post by poink » Fri Dec 30, 2016 5:18 pm

duikkie wrote:"TIP: Texas Instruments (TI) power transistor, plastic case"

so why not TI8231 or TI8406 by Texas Instruments ? (TI)P is for power normal then TI ??
It might well be a TI part. It might have been made by a division that TI closed or spun off and/or it's simply discontinued or renumbered long enough ago that it's not in the resources customer service people have available (and I'd be surprised if they had stuff there that's not on the website).

Whilst I can find TI coded transistors in a 1973 databook, I can't find either of the codes you've given; the closest is TIS, but, I can't see anything that would match the other digits.

Another problem is private coded parts (where it's a custom run). In this case, TI will probably just deny everything; if you're very lucky they might say that they made it, but won't provide any details. I'd be surprised if someone bothered to do this for transistors in a PSU though.

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1024MAK
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Re: stupied,bad eyes or else

Post by 1024MAK » Fri Dec 30, 2016 6:44 pm

duikkie wrote:"TIP: Texas Instruments (TI) power transistor, plastic case"

so why not TI8231 or TI8406 by Texas Instruments ? (TI)P is for power normal then TI ??
But, it could also be a discontinued Toshiba part...

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Re: stupied,bad eyes or else

Post by duikkie » Fri Dec 30, 2016 6:56 pm

q4 is a black boxs transistor :(

looks like a to92 type

but leg 1 is b
... leg 2 is e
... leg 3 is c

normal vbe=0.7 this one vbe=2.15 if i measure transitor als diode it looks like PNP

Vce=1.8 volt ??? i can't get a hfe factor ??

i don't want to distroy it , so what more can i do ??

vbe=2.15 this can be overkill to open the black box thing

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marcusjambler
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Re: stupied,bad eyes or else

Post by marcusjambler » Tue Oct 23, 2018 6:04 pm

Hi Duikkie

Trawling up an old thread ... :D
q4 is a black boxs transistor :(
Did you figure out what Q4 is?

Marcus
Last edited by marcusjambler on Tue Oct 23, 2018 6:05 pm, edited 1 time in total.

Kazzie
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Re: stupied,bad eyes or else

Post by Kazzie » Mon Oct 29, 2018 9:12 am

Since the thread's been resurrected:
poink wrote:
Fri Dec 30, 2016 2:38 am
(I doubt it's an acquisition in the case of SN - 74 series logic was created by TI)
SN stands for "Semiconductor Network" , the marketing name TI used in the 60s for their Series 54/74 TTL chips, and also their earlier Series 51 DCTL and Series 53 DTL chips. See for example https://www.sciencedirect.com/science/a ... 064650041X
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