TDA7294 no longer has short-circuit protection ?

[Tarzan_1]

I have a news that ST REMOVED SHORT CIRCUIT PROTECTION FROM TDA7294 IC, please confirm is enews real? Or not?

[Tarzan_1]

This question is for directly to ST that I had measured tda7294 and I got 5.59grams a ic in weight, a original tda7294 how much weight? Is this correct? I want answer from St stuffs who knows all about of this ic. Tell me is this weight correct? And I got two ic and print is different code and different lazer one is very deep print another one is light print,as you can see the attached pic. Both purchased from different sellers and different places. Left code is CZAK5433 and Right side is CZPKD403 is both are original??

 

 

 

 

[TDK]

Where did you buy them from? Was it from an authorized distributor?

[Tarzan_1]

I don't know but both sellers are tolds it's original when they sold it.
And I can checkd pins both reading in multimeter arround same,only
difference in print as you can see the pic, both ic weight also 5.69g. is
not here any ST employee??

[Peter BENSCH]

The repeated use of exclamation marks or question marks can come across as stressed or agitated and may create an impression of angry or urgent pressure. However, this community is intended as a place where users support each other in a friendly and respectful way (see Terms and Conditions, §2), and where ST colleagues participate only occasionally (and are very unlikely to be present at weekends) - see Terms and Conditions, §7.1, §7.2 and §7.3.

Marking each individual component with a unique code would unnecessarily increase the cost of the devices. It is also not sensible for the reason already mentioned: official distributors sell only original products and can not only claim this but also guarantee it. So, if you bought the devices from Asian discount retailers, Amazon Marketplace, or similar providers, the shop may claim that it is original, but can they prove it?

Regarding your last question: the codes you read, CZAK5433 and CZPKD403, are not proof of original goods but at least the first 5 characters are internal abbreviations for the place of manufacture. The last three characters (here 433 and 403) are the date code in the format YMM, meaning the last digit of the manufacturing year and the calendar week number. The TDA7294 could have been on the market as early as 1994 (I still have a datasheet from 1996), so the 4 can stand for the manufacturing years 1994, 2004, 2014 or 2024.

Therefore, from the marking alone, it is not possible to tell whether a device is original. However, the label on the original ST packaging bag contains a Bulk ID, from which the exact path can be traced. If you have this Bulk ID and send it to me via Personal Message (not here in the public community thread!), I can gladly check it for you.

As for the weight, you can find it in the Material Declaration (PDF) on the product website under Quality & Reliability, where you will find the value 5600.803 mg, which seems to correspond quite well with your measurement.

Regards
/Peter