Texas Instruments

SN74LS47D

SN74LS47D Description

The SN74LS47D from Texas Instruments is a BCD-to-7-segment decoder/driver IC designed for driving common-anode LED displays. Housed in a 16-pin SOIC package, it operates within a 4.75V to 5.25V supply range and consumes 7 mA of current, making it suitable for low-power digital systems. With an operating temperature range of 0°C to 70°C, this surface-mount device is RoHS3 compliant and REACH unaffected, ensuring environmental and regulatory compatibility.

SN74LS47D Features

• BCD-to-7-segment conversion: Directly interfaces with binary-coded decimal (BCD) inputs to drive 7-segment LED displays.
• Low power consumption: Ideal for battery-operated or energy-efficient designs with a 7 mA supply current.
• Wide voltage range (4.75V–5.25V): Compatible with standard TTL logic levels.
• Surface-mount design (16-SOIC): Saves board space and simplifies assembly in compact applications.
• Active-high outputs: Optimized for common-anode LED displays, with built-in ripple-blanking and lamp-test functions.
• High reliability: Moisture Sensitivity Level (MSL) 1 ensures durability in varied environments.

SN74LS47D Applications

• Digital panel meters: Converts BCD data from counters or microcontrollers into readable 7-segment displays.
• Industrial control systems: Used in process indicators, instrumentation, and HMI (human-machine interface) devices.
• Consumer electronics: Powers numeric displays in appliances, calculators, and clocks.
• Automotive dashboards: Drives segment-based readouts for speed, fuel, or temperature indicators.
• Educational kits: Simplifies prototyping for students learning digital logic and display interfacing.

Conclusion of SN74LS47D

The SN74LS47D stands out for its efficient BCD-to-7-segment conversion, low power draw, and robust surface-mount packaging. Its compatibility with common-anode LEDs and TTL logic makes it a versatile choice for digital display systems across industrial, automotive, and consumer applications. With Texas Instruments' reliability and RoHS3 compliance, this IC is a dependable solution for engineers seeking precision and durability in display-driving circuits.