74HC47 – 7447 ( BCD to 7-Segment Decoder )

74HC47 (BCD to 7-Segment Decoder/Driver) General Description The 74HC47 is a BCD to 7-segment decoder/driver IC designed to convert a 4-bit Binary Coded Decimal (BCD) input into the correct output signals for driving a 7-segment display. It is commonly used in digital clocks, counters, panel meters, and numeric display circuits. This IC is typically used with common-anode 7-segment displays. Key Features Converts 4-bit BCD input to 7-segment display output Designed for common-anode displays High-speed CMOS logic Low power consumption Suitable for digital display and counting applications Includes control pins for lamp test, blanking, and ripple blanking Main Functions Accepts BCD inputs: A, B, C, D Decodes numbers 0 to 9 Activates the required segment outputs: a, b, c, d, e, f, g Helps reduce wiring complexity in numeric display circuits Applications Digital counters Frequency meters Calculator displays Embedded electronics projects Numeric indicator circuits Industrial control panels Important Note Best suited for common-anode 7-segment displays For proper operation, current-limiting resistors should be used with the display segments Package Type Commonly available in DIP-16 74HC47 – Pin Functions 🧠 BCD Inputs Pin 7 – A: Least Significant Bit (LSB) input Pin 1 – B: BCD input Pin 2 – C: BCD input Pin 6 – D: Most Significant Bit (MSB) input 7-Segment Outputs (Active LOW – for Common Anode) Pin 13 – a: Segment A output Pin 12 – b: Segment B output Pin 11 – c: Segment C output Pin 10 – d: Segment D output Pin 9 – e: Segment E output Pin 15 – f: Segment F output Pin 14 – g: Segment G output Control Pins Pin 3 – LT (Lamp Test): Forces all segments ON when LOW Pin 4 – BI (Blanking Input): Turns OFF all segments when LOW Pin 5 – RBI (Ripple Blanking Input): Used for leading zero suppression Power Pins Pin 16 – VCC: +5V Supply Pin 8 – GND: Ground

74HC47 BCD to 7-Segment Decoder/Driver Com. Anode – 7447 Specifications TYPE DESCRIPTION Category Integrated Circuits (ICs) Mfr Texas Instruments Series 74LS Package Tube Part Status Active Display Type LED Configuration 7 Segment Interface BCD Digits or Characters ? Current ? Supply 7 mA Voltage ? Supply 4.75V ~ 5.25V Operating Temperature 0?C ~ 70?C Mounting Type Through Hole Package / Case 16-DIP (0.300?, 7.62mm) Supplier Device Package 16-PDIP Base Product Number 74LS47 Datasheet: 74LS47 Related Products: 74xx ICs

74HC47-7447 ( BCD to 7-Segment Decoder) is a high-quality electronic component designed for Arduino, prototyping, and educational electronics. BCD to 7-segment decoder/driver IC For Common anode (CA) configuration of seven segment. It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.