The KJ1 is not pin for pin the same as the K1, but it is roughly 70% the cost of the K1. Although the K3 is pin for pin the same as the K1, it is roughly 90% the cost of the K1. This application note illustrates the differences between the K1 and the KJ1. Using the KJ1's additional features can further enhance your system design. Consult the K1 and KJ1 databooks for detailed design reference. See References/Additional Reading in this application note.