74LS47 BCD to 7 Segment Decoder/Driver IC (7447) DIP 16 Package

74LS47 BCD to 7 Segment Decoder/Driver IC (7447) DIP 16 Package

The 74LS47 is a BCD (Binary-Coded Decimal) to 7-Segment Display Decoder/Driver IC from the Low Power Schottky TTL (74LS) logic family.
It converts a 4-bit binary-coded decimal input (0000–1001) into corresponding signals to drive a common anode 7-segment display.

The IC features open-collector outputs capable of sinking current to directly drive display segments through current-limiting resistors.
It also includes built-in lamp test, blanking, and ripple-blanking input/output controls for cascading multiple digits in multi-digit display systems.

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Features:- 

• Open-collector outputs
• Drive indicator segments directly
• Cascadable zero-suppression capability
• Lamp test input

Specifications:-

Functional Description

• The BCD inputs (A–D) determine the numeral displayed.
• Open-collector outputs drive common anode LEDs through resistors.
• LT (Lamp Test), when pulled LOW, lights all segments.
• BI (Blanking Input) disables outputs (turns all LEDs off).
• RBI/RBO help blank leading zeros in multi-digit configurations.

Applications

• Digital clocks and timers
• Counter display units
• Scoreboards and calculators
• Numeric display systems
• Microcontroller numeric output
• Event counters and tachometers

74ls47-ic-datasheet