Why is the TI part shown not in the tool available to purchase?

In some cases there may not be an option to purchase a TI part listed in the tool. This may be because, there is no inventory available at this time, or the part itself may not be an orderable part number, in which case you can search for orderable part numbers on the TI product folder for that part by clicking on the “View product folder” link, in the tool. If we do not have an equivalent TI part for a submitted part number, we may also provide a link to the respective product family page or parametric search table. From here, if you find a part that fits your needs, you will be able to purchase it from either the TI store or one of the TI Authorized Semiconductor Distributors.