Nothing old about these chips. I used them to build a damn nice Arduino 5.5 digit DMM, and a calibration unit that can output 50VDC (all based off the Scullcom Hobby Projects, YouTube channel; I just tweaked them a bit). I also recreated his DIY DC load and had a great time with it. It became the base model 18650 tester I used for about 8 months.
I think I am going to be good for a while (as far as CAL UNITS go), so the offer is extended to anyone who wants to build a fun project and see where they can take it. Like I said, the blueprints and all credit go to the Scullcom Hobby YouTube channel, it will guide you seamless through the project. Some great HOMEMADE TEA there.