Douglas's response is the most accurate. For what ever reason, card issuers in the US are reluctant to go full Chip and Pin. They say Americans find Pin numbers too hard to use, I think that due to the additional network requirements (read costly) to validate PIN numbers for millions of transactions a day, they prefer to stick with an unvalidated signature.
As for what you might have or get, if you receive a Chipped card and are asked to activate it without establishing a pin first...then it is likely a Chip and Signature like 90+% of the cards available. There are a few true Chip and Pin cards in the US, Andrews Credit Union is, if you qualify for membership; I have a Citi card that is issued by my business that is, and by searching you might find a few others. If you are given only the option to set up a PIN, then it is likely still a chip and signature, the PIN only for cash withdrawals at an ATM
If you have only a chip and signature, as a couple of my other cards are,it is still of value in Europe, it makes transactions easier, the readers work better, people recognize how to use it, and the printer simply spits out a receipt for you to sign. It may work in some kiosks (mine did in the London Tube) but not in most.
If you are lucky enough to have a true chip and pin, you may still be confused in Europe; as I mentioned, I have one for business, my experience was that sometimes I was asked for a signature, sometimes for a PIN. This was due to the combination of the CVM (card validation method) set by the issuer and the terminal I tried to use it at. Nearly all Chip and PIN cards in the US still list signature as the primary CVM, then maybe followed by online PIN, offline PIN, then maybe "No Validation". So if the terminal will accept a signature, I signed, if not, I had to use a PIN, for low dollar transactions, it required neither signature or PIN.