Worst data sheets?

Try the ISDN chips from Infineon (formerly Siemens). Germans (sorry Joerg) just can't seem to write simple and to the point datasheets / documents. Where Mitel needs 5 pages, Infineon needs 500 and still can't describe the functionality right.

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Reply to nico@nctdevpuntnl (punt=.)
Bedrijven en winkels vindt U op www.adresboekje.nl

WOT? And give up all those proprietary interfaces?

--
Service to my country? Been there, Done that, and I\'ve got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

[...]

At least their offspring ON-Semi has a well functioning web site. That alone seems to be a major achievement these days.

In most large companies the execs have totally lost touch with their market. In the smaller company I once worked the CEO made us division managers go out there, to actual clients. Standing in a catheter lab for

12 hours with a lead vest on, blood splattering all over the place, and a back pain creeping up. Very valuable experience.

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Regards, Joerg

http://www.analogconsultants.com

"Blood splattering all over the place"??

Sloppy surgeons?

When I had my stent placed, the incision into the femoral artery barely spilled a few drops.

But then my surgeon was Robert W. Dappen, M.D., F.A.C.C., who teaches the procedure at seminars throughout the country.

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
         America: Land of the Free, Because of the Brave

BTW, about a month ago the NXP stock went up by 20%. I guess their executives know what they are doing.

I asked a sales rep from NXP about their website. They are very happy about the "new look, which is a lot better then it used to be".

Vladimir Vassilevsky

DSP and Mixed Signal Design Consultant

Wait a while :-)

Sure, what did you expect a sales rep to say?

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Regards, Joerg

http://www.analogconsultants.com

You were probably an easy case. In, out, done. Sometimes it's really plugged up and you need to go in with the rotor first.

I've designed a patient interface for an IVUS machine and sometimes service guys asked me stuff and I had to look at the board. That was not for the squeamish.

Where I went those were also what we call "luminaries". Guys that you'll see in the Klieg lights at TCT, presenting tough cases. They often get the cases that others won't touch with a 10ft pole.

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Regards, Joerg

http://www.analogconsultants.com

What did they do this time? Somehow I am glad that every time I contemplated a MMIC I got cold feet and designed around a good old RF transistor. They can't mess those up, or at least they haven't yet in my cases.

I just don't like single-sourced stuff. Plus (usually) I can't live with

1dB gain tolerances.

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Regards, Joerg

http://www.analogconsultants.com

Oh, I try to. Maybe that's why I am in the US now :-)

Even if you look at a perfectly written and translated document the text is about 20% longer in German. Especially in American there are some really concise ways to explain stuff. The best was in an old ARRL Handbook, explaining what the "Cancel" button does: "It is the I did not mean to press that button button".

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Regards, Joerg

http://www.analogconsultants.com

Less gain, grossly shifted DC bias points. And total ignorance, among the MiniCircuits support staff, as to what complicated stuff like that means.

A good mmic, like the Sirenza parts, is amazing... 20 dB gain from audio to several GHz, low noise figs, 50 ohms in and out, unconditionally stable, dirt cheap.

Can you hold better than 1 dB with discretes? I've programmed mmic biases with dacs so I could control gain and especially input impedance.

John

I am sure there are some good ones but one thing I realized is that there are rarely two from different companies that are 100% swappable. Most of my clients would want that, especially in view of the rapid-fire acquisition games in the semi biz lately. A purchaser who receives a fancy letter stating that "We are happy to announce that we are now part of XYZ Corporation" usually gets goose bumps at that moment.

I can usually hold 1dB with discretes. When it has to go to much less than 0.5dB active laser trim is done. Not a big deal by doing meander cuts into the collector resistor. But nowadays I resort to PIN diodes because they have become so cheap and laser trimming has become pricey.

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Regards, Joerg

http://www.analogconsultants.com

skrev i en meddelelse news: snipped-for-privacy@d55g2000hsg.googlegroups.com...

TOKO whups there arse! What info there is is in Kanji!!

That's to ensure the reader (the author himself and his girlfriends mum) that he really is a "Doktor Ingeniör" (sp??) ;-)

Worst data sheets are no data sheets. Go to

and search for TC58FVB160AFTG-70 which is one of their flash chips that is no longer made. Fair enough, but the search for this part does even acknowledge the existence of it. It only shows up listed in end of life listing and even there you cannot get the data sheet. Bastards.

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    Boris Mohar

This seems typical behaviour of Asian chip makers. No longer produced, no longer need to know about it.

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Reply to nico@nctdevpuntnl (punt=.)
Bedrijven en winkels vindt U op www.adresboekje.nl

Same in Europe. The offspring shuns their former parent companies. Try to get a datasheet of an older TCA chip from the former Siemens brand.

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Regards, Joerg

http://www.analogconsultants.com

The last time I bought that device was in April 2007, from Digikey which usually sends me a warning notice when some trivial passive device is no longer available, but not this time.

Motorola, when they went by that name and started to cut back on discrete active devices adopted that "no longer supported / never heard of it trend"

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    Boris Mohar

I suspect they will do well by recommending current version chips with obvious links to the current recommended ones from all references to the obsoleted chips! Or at least they should! Chip manufacturers who take a little trouble for website guidance to transitioning from an obsoleted favored chip to its replacement should succeed over competitors who fail to adequately publish such guidance while also discontinuing same older-favored chip!

- Don Klipstein ( snipped-for-privacy@misty.com)

The old Texas 74LS series book used to have a data sheet for the

74LS2000 quadrature input up-down counter, which I think was originally a logic array of some sort designed in Germany. The data sheet contained the classic line, "..contains logic to prevent faultless operation of the device".