SN74LS47N

Overview

The SN74LS47N is a BCD-to-seven-segment decoder and driver manufactured by Texas Instruments. It belongs to the SN54/74LS logic series, designed for direct interface with seven-segment displays. The device accepts four-bit Binary-Coded Decimal inputs and converts them into appropriate segment outputs. It features active-low outputs capable of driving high-current loads directly. The component operates within a supply voltage range of 4.75V to 5.25V and supports a standard operating temperature range from 0°C to 70°C. It is housed in a 16-pin PDIP package.

Feature Summary

• Converts four-bit binary-coded decimal input codes into seven-segment display signals
• Provides active-low outputs with high current drive capability for direct LED interfacing
• Includes dedicated lamp test and ripple blanking control inputs for display management

Applications

• Direct driving of common-cathode seven-segment LED displays
• Numeric readout systems in industrial instrumentation
• Digital clock and timer circuits requiring decimal digit visualization

Procurement Notes

Verify that the specific order suffix matches the required package type and temperature grade. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Ensure the supplier provides valid datasheets matching the SN74LS47N designation to guarantee functional compatibility with existing circuit designs.

Selection Notes

Select this component when a dedicated decoder is required to simplify microcontroller or logic gate output requirements. It is suitable for applications needing direct high-current drive without external transistors. Consider alternative logic families if lower power consumption or different voltage levels are necessary for the system architecture.

Part Context

This part belongs to the widely adopted SN54/74LS family of logic integrated circuits. These components are standard TTL devices known for reliable operation in digital systems. The SN74LS47N specifically addresses the need for efficient decimal decoding in legacy and modern embedded systems utilizing discrete display elements.

Replacement Considerations

SN74LS47NE4

FAQ

What type of seven-segment display does the SN74LS47N support?

The SN74LS47N is designed to drive common-cathode seven-segment displays due to its active-low output configuration.

How many bits of input data does the decoder process?

The device processes four bits of binary-coded decimal (BCD) input data to generate the corresponding segment outputs.