This is the link I use to Ranfft : https://web.archive.org/web/20230305223408/http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk
The search function doesn't work, so the link should show all the movements.
Why do you doubt? It is a common current name for transistors with included base and base-emitter resistors. They are not „digital“ by itself but can be used in digital circuits without added components.
Frank