I'm hoping someone can help a noob out here. I've been reading a lot of data sheets of late looking for chips that will work for a small project. In short I need to drive a number of outputs (mainly LED) at 5 V 20 mA. The load is between the IC and ground (source current?) and it can't be changed. There is a ready made solution and the supplier insists it will be OK but having read the data sheet I don't think it will.
My understanding is that is has a max of 35 mA per pin, but a total of 70 mA for the IC. Am I wrong? Would really appreciate some input.