The 74LS47 accepts four lines of BCD input data, generates their complements internally and decodes the data with seven AND/OR gates aving 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 mA. 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.
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