i have a couple of adc121c027cimk/nopb and the corresponding data sheet.
however, i can't find any pin 1 index or orientation marking on the tsot package.
does anyone know how to identify pin 1 on this part?
thanks, jon
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i have a couple of adc121c027cimk/nopb and the corresponding data sheet.
however, i can't find any pin 1 index or orientation marking on the tsot package.
does anyone know how to identify pin 1 on this part?
thanks, jon
Hi Jon,
Regarding the ADC121C027 six pin TSOT, have you reviewed the package description on page 30 of the data sheet?
Hello Jon,
In a TSOT-6 package, a printed line or other type of marking is typically located between pins 1 and 6. Since we don’t know the exact marking on the part, we would appreciate if you could send us a picture with the top markings of the chip you are using?
Thank you,
Rafael Ordonez
Tom,
Yes. The part does not have the 1/4 package hash-mark as described in the data sheet.
Jon
Rafael,
I don't think I could send you a quality photograph of the top of the chip.
One has to get the light "just right" to even see the printing.
The chip is marked with X31C in text with what appears to be a faint underline.
The printing is parallel to the long side of the package.
The faint underline might be stamped in the package or printed...I can't tell;
these parts aren't very large.
It certainly doesn't have the 1/4 package hash shown in the data sheet.
Jon
Hi Jon,
When the device is rotated so that the text is readable, pin 1 should be on the lower left. Take a look at the TO/SOT detail on this package marking website:
Hi Tom,
Interesting reference; thanks.
The only thing is that there are no words that say the "device name" text has a
specific orientation to pin 1.
However, this makes some intuitive sense, so I will try that first. It appears that
even rotated, the device will simply fail to function properly and not self destruct.
The other point I would make is that the data sheet needs to be updated!
Thanks again,
Jon
Hi Jon,
Point taken - I'll see if we can get those pictures changed to say 'Device Marking' or something along those lines. The 6-pin SOT packages just don't have enough surface area to get the full device name on them so they have a 4 character code associated with them instead of the device name. We'll get the data sheet clarified as soon as possible.