Author Topic: TI datasheets  (Read 3296 times)

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Offline tooki

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Re: TI datasheets
« Reply #25 on: May 12, 2021, 08:19:24 pm »
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Not sure if you are aware that 2 years ago, TI ended distribution through all but a tiny handful of distributors (Digi-Key and Mouser being the main two). Everyone else got dropped.

Ah, I didn't know that. Even so, I'd've thought they would be keen to have their data spread far and wide - in the end it is advertising, and we all know how difficult it is to block that!
Well, I doubt it was at TI's request: a few TI products on RS do have TI datasheets and manuals (all dev boards, though, which may not fall under the distributor cull). So I suspect it's RS's decision, and that the rep who replied to you simply gave a boilerplate response without doing any investigation whatsoever.

I checked a few other former/unofficial distributors, and one (Distrelec) seems to have no TI datasheets, which I am fairly sure they used to. But two others (Reichelt and Jameco) have datasheets, so it's unclear whether TI is asking RS and others to take down datasheets.

If I had to guess, I'd speculate that the former distributors signed something way back when, saying that as distributors, they're entitled to share TI documentation. And once their distribution contract was terminated, the distributors' lawyers said to take down the docs to be on the safe side. But this is pure speculation, I have no evidence either way.
 

Online PlainNameTopic starter

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Re: TI datasheets
« Reply #26 on: May 12, 2021, 09:17:58 pm »
Sorry, but...

Quote
So I've run into the problem now

 ^-^
 

Offline amyk

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Re: TI datasheets
« Reply #27 on: May 13, 2021, 12:32:12 am »
I don't know what the CDN would be in this case. Both browsers show only sending request to TI.com for the pdf, neither NoScript or uBlock Origin show any other connections that could be blocked.
If you do a DNS lookup on www.ti.com you'll see that it resolves to a server whose name actually ends in "akamaiedge.net". There's also some other interesting records returned:
Code: [Select]
; <<>> DiG 9 <<>> @localhost [url=http://www.ti.com]www.ti.com[/url] A
 ; (1 server found)
 ;; global options: +cmd
 ;; Got answer:
 ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48339
 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0
 
 ;; QUESTION SECTION:
 ;[url=http://www.ti.com]www.ti.com[/url]. IN A
 
 ;; ANSWER SECTION:
 [url=http://www.ti.com]www.ti.com[/url]. 300 IN CNAME china.[url=http://www.ti.com.edgekey.net]www.ti.com.edgekey.net[/url].
 china.[url=http://www.ti.com.edgekey.net]www.ti.com.edgekey.net[/url]. 21600 IN CNAME china.[url=http://www.ti.com.edgekey.net.globalredir.akadns.net]www.ti.com.edgekey.net.globalredir.akadns.net[/url].
 china.[url=http://www.ti.com.edgekey.net.globalredir.akadns.net]www.ti.com.edgekey.net.globalredir.akadns.net[/url]. 3600 IN CNAME e2888.dscx.akamaiedge.net.
 e2888.dscx.akamaiedge.net. 20 IN A 104.65.33.38
 
 ;; Query time: 331 msec
 ;; SERVER: 127.0.0.1#53(127.0.0.1)
 ;; WHEN: Thu May 13 00:31:18 2021
 ;; MSG SIZE  rcvd: 184
Those of you who are having this problem may be able to troubleshoot what's failing by taking a packet trace.
 

Offline tooki

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Re: TI datasheets
« Reply #28 on: May 13, 2021, 01:18:07 am »
Sorry, but...

Quote
So I've run into the problem now

 ^-^
...and?
 

Online PlainNameTopic starter

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Re: TI datasheets
« Reply #29 on: May 13, 2021, 11:12:28 am »
Quote
Those of you who are having this problem may be able to troubleshoot what's failing by taking a packet trace.

Resolves and pings fine for me. Tracert shows some packet loss when it enters my ISP's network, but only from that hop. The end point is fine.

 

Offline rsjsouza

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Re: TI datasheets
« Reply #30 on: May 13, 2021, 07:58:01 pm »
If you do a DNS lookup on www.ti.com you'll see that it resolves to a server whose name actually ends in "akamaiedge.net".
That is probably the issue and explains why people in different parts of the world see things differently. Akamai is a proxy/cache service that stores data nearer the origin of the request.

IME they are not the most stable service in the world...
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Offline tooki

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Re: TI datasheets
« Reply #31 on: May 14, 2021, 10:24:44 am »
If you do a DNS lookup on www.ti.com you'll see that it resolves to a server whose name actually ends in "akamaiedge.net".
That is probably the issue and explains why people in different parts of the world see things differently. Akamai is a proxy/cache service that stores data nearer the origin of the request.

IME they are not the most stable service in the world...
It’s not a geographical issue, since we have reports of it from various parts of the world, plus my experience of it working on one device and not another, on the same internet connection.
 

Offline station240

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Re: TI datasheets
« Reply #32 on: May 15, 2021, 06:28:32 pm »
TI had a crackdown on websites hosting their datasheets last year.

Including a site archiving datasheets.
https://twitter.com/marcan42/status/1347403996332376065
 
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Online PlainNameTopic starter

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Re: TI datasheets
« Reply #33 on: May 15, 2021, 06:53:44 pm »
Gosh, wonder why they did that. Bit of a foot-shooter.
 

Offline Vovk_Z

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Re: TI datasheets
« Reply #34 on: May 16, 2021, 07:45:03 pm »
I just typed "TI 555 timer" in the Chrome, and got full 27 page pdf. Sorry, if this was not helpful.
 

Offline exe

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Re: TI datasheets
« Reply #35 on: May 17, 2021, 06:25:58 am »
Ha-ha, now I got troubles with TI datasheets too. The server responds with "HTTP/1.1 304 Not Modified", even when just trying to download directly, without any cookies or whatever. I didn't find a way to download that file ( https://www.ti.com/lit/ds/symlink/lm317-n.pdf ).

Now I also recall that I had this issues recently. I had to reload page several times before I could download it.
 

Offline amyk

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Re: TI datasheets
« Reply #36 on: May 17, 2021, 01:26:51 pm »
Ha-ha, now I got troubles with TI datasheets too. The server responds with "HTTP/1.1 304 Not Modified", even when just trying to download directly, without any cookies or whatever. I didn't find a way to download that file ( https://www.ti.com/lit/ds/symlink/lm317-n.pdf ).

Now I also recall that I had this issues recently. I had to reload page several times before I could download it.
Ctrl+F5 or whatever your browser uses to mean "full refresh".
 

Offline exe

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Re: TI datasheets
« Reply #37 on: May 17, 2021, 02:15:11 pm »
Ctrl+F5 or whatever your browser uses to mean "full refresh".

Tried that, it didn't help. Not just that, I tried to fetch datasheet with curl, with and without cookiesm anonymous mode, no luck. Like this doesn't work for me: curl -vv 'https://www.ti.com/lit/ds/symlink/lm317-n.pdf' .
 

Online magic

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Re: TI datasheets
« Reply #38 on: May 17, 2021, 03:26:29 pm »
Exactly. I clicked a few links here out of curiosity and some return 304 and some return 304 or 200 depending on whether I use a browser or wget.

This response is only valid if the client requests a version newer that it already has in its cache using special HTTP syntax. Sending it to normal request is illegal. I suspect some misconfiguration, where responses between their cache servers are leaked to the client in semi-random circumstances.
|O
 
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Offline exe

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Re: TI datasheets
« Reply #39 on: May 17, 2021, 04:38:18 pm »
Ah, got it. Illegal means the webserver should not send 304 arbitrary, but only when the client provided a special header to check.
 

Offline alexwhittemore

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Re: TI datasheets
« Reply #40 on: May 17, 2021, 08:12:53 pm »
Just to pile on, I've ALSO been having issues with TI datasheets lately, not MERELY that they are less accessible than I'd prefer in terms of direct links from octopart and digikey.

* One part, the DS link on TI's product page works consistently from my phone, but not from (any of multiple) desktop browser(s)
* Octopart/DK link TO THE PRODUCT PAGE, which you THEN have to click the datasheet link on. Makes part selection surprisingly cumbersome.
* Every goddamn link in Altium's content vault/SnapEDA/componnentsearchengine is dead now. Absolutely maddening.

I do wish they'd pull their head out of their ass on this one.
 

Offline rsjsouza

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Re: TI datasheets
« Reply #41 on: May 17, 2021, 08:40:29 pm »
Perhaps ask a question on their e2e site support forum and point to this thread could help solve this? They tend to be pretty responsive there.

https://e2e.ti.com/support/site-support-group/site-support/f/site-support-forum
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 


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