Component Identification

[OldTechie]

I've been given a small handful of ICs that I can't identify, hoping that someone here might be able to help.
The first IC is a 7-pin D-Pak, has a Siemens logo, with part number 9341.1D at the top of the part and TEVES92 text at the bottom. I found the TEVES92 part number listed on a number of sites of obsolete parts sellers but nothing that gave an indication fo the function or a datasheet.
The second IC is a 20-pin SOIC part having National Semiconductor logo, with text H81AD on the first line, F1071 on the second line. Can't find anything on this one.

Can anyone help with the identity of either of these parts?
Thanks,
DaveM

 

[tepalia02]

The first part's name looks similar to this one: https://www.ebay.co.uk/itm/164385681616 But could not find any datasheet.

 

[vtech]

On your second IC, add a 74 in front of F1071?--- Early 90's era manufactured by National & Fairchild in SOIC package

 

[OldTechie]

Yep, the part on eBay is the same part as the ones I have, but so far, I've found nothing online that even mentions the basic function, certainly not a datasheet.
And vtech's suggestion for the other part seems to be on track; it fits the package description and marking. I'll check it further after the weekend when I can get access to the proper test equipment. Thanks for pointing me in the right direction. I had tried to find an old TTL 74/54 part with the H81AD number, but no joy with that approach. I was thinking that the F1071 was a date code of sorts, but nothing in Fairchild's old databooks helped with either approach.

Thanks, guys for the help,
DaveM

 

[narkeleptk]

I was thinking that the F1071 was a date code of sorts, but nothing in Fairchild's old databooks helped with either approach.

you probably have it the other way around. H81AD is likely date code.

https://media.digikey.com/pdf/Data%20Sheets/Fairchild%20PDFs/74F1071.pdf