BCD to seven segments decoders-drivers 7447A (74LS47) and 7448 (74LS48)
The integrated technology TTL 7447A (74LS47) is a BCD decoder/driver to seven segments common anode display, while the integrated TTL 7448 (74LS48) makes the same work, but in a seven segment common cathode display. You can see the structure of the terminals of these two integrated circuits at the following figure: