The 74LS47 accepts four lines of BCD (8421) input data, generates their complements internally and decodes the data with seven AND/OR gates having open-collector outputs to drive indicator segments directly. Each segment output is guaranteed to sink 24 mA in the ON (LOW) state and withstand 15V in the OFF (HIGH) state with a maximum leakage current of 250 µA. Auxiliary inputs provided blanking, lamp test and cascadable zero-suppression functions.
- Open-collector outputs
- Drive indicator segments directly
- Cascadable zero-suppression capability
- Lamp Test input
- 1 x 74LS47 BCD to 7-Segment Decoder/Driver IC