7447 BCD to 7-Segment Decoder / Driver
The 7447 ic is used to drive common anode 7 segment displays. You can directly
connect the 7 segment displays to 7447, which has open collector outputs.
When data in BCD format sent from the A-B-C-D input ports of the 7447 ic, is sent to the 7-segment display through the a-b-c-d-e-f-g output ports.
In the picture below, you can examine the circuit diagram created with 7490 IC. It can work by connecting directly to 74LS47.
- When clock pulse is applied to 7490 (Pin 14), it starts counting upwards. The count between 0-9 (decimal) is applied to the A-B-C-D inputs of the 74LS47