SN74LS47DR

Overview

The SN74LS47DR is a hex BCD-to-seven-segment decoder and driver manufactured by Texas Instruments. It belongs to the LS logic series and features open-collector outputs designed for direct driving of seven-segment displays. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports a wide operating temperature range from 0°C to +70°C. Packaged in a 16-pin SOIC-Narrow surface-mount format, it provides high-level output current of -400 uA and low-level output current of 8 mA.

Feature Summary

• Converts binary-coded decimal inputs into signals compatible with seven-segment display devices
• Features open-collector outputs capable of handling higher voltage loads than standard TTL levels
• Includes built-in ripple blanking functionality to suppress leading or trailing zeros

Applications

• Digital clock and timer display systems
• Numeric readout panels for industrial control equipment
• Consumer electronic device interfaces requiring decimal digit visualization

Procurement Notes

Verify that the specific order suffix matches the required package type and tape/reel specifications. Confirm compliance with RoHS directives and check for any recent product lifecycle notifications. Ensure the supplier source is authorized to guarantee component authenticity and traceability.

Selection Notes

Select this component when designing circuits that require direct interfacing between microcontrollers and seven-segment displays without external decoding logic. Consider the open-collector architecture for applications needing voltage level shifting or wired-OR connections. Evaluate thermal requirements against the specified operating temperature limits.

Part Context

This part is a member of the Texas Instruments SN74LS family, which utilizes Low-power Schottky technology to reduce power consumption while maintaining speed. It serves as a specialized interface solution within the broader logic IC portfolio, bridging digital processing units with visual output hardware.

Replacement Considerations

Compatible substitutes include the SN74LS47N for through-hole mounting or the SN74LS47ADWR for alternative surface-mount packaging variants.