The 74LS47 is a BCD to 7-segment decoder/driver IC that accepts four lines of BCD (8421) input data, generates their complements internally, and decodes the data using seven AND/OR gates with open-collector outputs to drive indicator segments directly. Each segment output can sink 24 mA in the ON (LOW) state and withstand 15V in the OFF (HIGH) state with a maximum leakage current of 250 μA. The IC features auxiliary inputs for blanking, lamp test, and cascaded zero-suppression functions, making it versatile for various display applications.
Key Features:
- Open-Collector Outputs: Drive indicator segments directly.
- Cascadable Zero-Suppression Capability: Allows for efficient display management.
- Lamp Test Input: Facilitates easy testing of display segments.
- UL Recognized: Ensures safety and reliability.
Specifications:
- Supply Voltage (Maximum): 7V
- Supply Voltage (Recommended): 5.25V
- Operating Free Air Temperature Range: 0ºC to 70ºC
Applications:
- Digital Displays: Ideal for driving 7-segment displays in calculators, digital clocks, and other devices.
- Indicator Panels: Used in various indicator panels for status display.
- Cascaded Display Systems: Suitable for systems requiring cascaded zero-suppression.
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