27L4ACD Datecode/marking

Hi Lothar,

I did some searching, but didn't find any TI web site that breaks down the marking code information is provided. I did find an internal site that decoded the 27L4ACD marking as the TLC27L4ACD, a quad LinCMOS operational amplifier; but I think you may have already knew that.

The two alphanumeric codes you listed contain date code and lot code information. How exactly it breaks down I can't say for sure. If you are concerned about counterfeit product and marking, see this E2E thread:

http://e2e.ti.com/support/power_management/etc_power/f/216/p/84313/1497686?keyMatch=counterfeit%20parts%20policy&tisearch=Search-EN-Everything

Regards, Thomas

PA - Linear Applications Engineering