The SN74LS247D from Texas Instruments is a crucial component for applications requiring the conversion of binary coded decimal (BCD) inputs into the corresponding 7-segment display outputs. It is part of the 74LS family of integrated circuits, which are known for their low-power Schottky technology, ensuring reliable performance with efficient power consumption.
This device is specifically designed to drive common-anode LEDs, incandescent indicators, or other display elements to represent numeric values, making it ideal for a wide range of applications, including calculators, digital clocks, and any digital display system. Its versatility is further enhanced by its capability to directly drive a 7-segment display without the need for external resistors, simplifying the design and reducing component count.
The SN74LS247D features an active-low output configuration, which means that it sinks current when outputting a logical "0". This characteristic is typical for driving common-anode displays. Additionally, it includes an automatic blanking input (BI) and lamp test input (LT) for testing purposes, allowing for easy diagnostics and system checks.
Encased in a standard SOIC-16 package, the SN74LS247D is designed for surface mount technology, which is conducive for modern, space-constrained electronic assemblies. Its compact size and the convenience of surface mounting make it a popular choice for PCB designers and electronic hobbyists alike.
Key features of the SN74LS247D include:
- Direct driving of common-anode 7-segment displays
- Low-power Schottky technology
- Active-low outputs
- Automatic blanking input (BI)
- Lamp test input (LT)
- Surface-mount SOIC-16 package
With its robust design and ease of use, the SN74LS247D from Texas Instruments stands out as an optimal solution for designers looking to interface digital logic with user-friendly numeric displays.
