SN74LS47DR

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SN74LS47DR

+BOM

IC DRVR 7 SEGMENT 16SOIC

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Specifications

Attribute Value
Part Status Active
Display Type LED
Configuration 7 Segment
Interface BCD
Supply Current 7 mA
Voltage - Supply 4.75V ~ 5.25V
Operating Temperature 0°C ~ 70°C
Mounting Type Surface Mount
Package / Case 16-SOIC (0.154", 3.90mm Width)
Supplier Device Package 16-SOIC
Base Product Number 74LS47

Overview

Description

The SN74LS47DR is a BCD (Binary-Coded Decimal) to 7-segment decoder/driver designed for driving 7-segment displays. It converts a 4-bit binary input (0-9) into the corresponding output for the segments of a display, allowing for easy visual representation of decimal numbers. The "LS" in its name indicates it is part of the Low Power Schottky TTL family, which means it has lower power consumption and higher speed compared to standard TTL logic.
Key features include:
- Outputs for segments a to g, with options for blanking and enabling the display.
- Active low outputs, meaning the segments light up when the output is low.
- Designed for operating voltages of 4.75V to 5.25V, suitable for various digital applications.
- Can be used in both common anode and common cathode configurations.
This IC is widely used in calculators, digital meters, and other devices requiring numeric displays. Its compact 16-pin package (DR) makes it suitable for space-constrained applications.

Equivalent

The SN74LS47DR is a BCD to 7-segment decoder/driver. Equivalent products include the SN74HC47, which operates with a higher voltage range, and the MC14495, a similar BCD to 7-segment decoder. Other alternatives are the CD4511 and CD4516, which also provide BCD decoding capabilities. Always check specific datasheets for compatibility and features.

Features

The SN74LS47DR is a BCD to 7-segment decoder/driver designed for driving 7-segment displays. Key features include:
1. BCD Input: Accepts binary-coded decimal (BCD) inputs (0-9) and translates them into the corresponding 7-segment display output.
2. Active Low Outputs: The outputs are active low, meaning they drive the display segments low to illuminate them.
3. Lamp Test: A lamp test function allows all segments to be turned on for visual testing of the display.
4. Blanking Function: The blanking input can turn off all segments regardless of the BCD input, allowing for display control.
5. Ripple Blanking Input: This feature enables the cascading of multiple decoders for displaying larger numbers.
6. Wide Supply Voltage Range: Operates at a supply voltage of 4.75V to 5.25V.
7. Fast Propagation Delay: Provides quick switching times, enhancing display responsiveness.
8. Low Power Consumption: Designed for efficiency, making it suitable for low-power applications.
These features make the SN74LS47DR ideal for various digital display applications.

Pinout

The SN74LS47DR is a BCD to 7-segment latch/decoder/driver designed for driving 7-segment displays. It has a total of 16 pins.
Key pin functions are as follows:
1. Inputs:
- A, B, C, D (Pins 2, 1, 3, 4): BCD input data.
- LT (Pin 5): Lamp Test input.
- BL (Pin 6): Blanking input.
- LE (Pin 7): Latch Enable input.
2. Outputs:
- a, b, c, d, e, f, g (Pins 10, 9, 8, 11, 12, 13, 14): Outputs to the 7-segment display.
3. Power & Ground:
- VCC (Pin 16): Positive supply voltage.
- GND (Pin 8): Ground.
4. Other:
- Pin 15 is not connected (N/C).
Overall, the SN74LS47DR facilitates the display of decimal digits on 7-segment displays by converting BCD inputs into the necessary output signals.

Manufacturer

The SN74LS47DR is manufactured by Texas Instruments (TI), a global semiconductor company. Texas Instruments designs and produces a wide range of analog, digital, and mixed-signal integrated circuits (ICs), as well as embedded processors. Established in 1930, the company is based in Dallas, Texas, and is known for its significant contributions to the electronics industry, particularly in the fields of analog and embedded processing technologies.
Texas Instruments serves various markets, including automotive, industrial, communications, and consumer electronics, providing solutions for applications such as power management, signal processing, and data conversion. The company's commitment to innovation and quality has made it a leading player in the semiconductor sector, with products that support advancements in technology across multiple industries. The SN74LS47DR, specifically, is a BCD to 7-segment latch/decoder/driver IC used in display applications, showcasing TI's expertise in providing components for digital display systems.

Application

The SN74LS47DR is a BCD to 7-segment decoder/driver used in various applications, including:
1. Digital Displays: Driving 7-segment displays in calculators, clocks, and electronic meters.
2. Embedded Systems: Providing a visual output for numerical data in industrial controls and instrumentation.
3. Consumer Electronics: Used in appliances for displaying settings, scores, or counts.
4. Automotive Displays: Indicating speed, fuel level, or other metrics on dashboard displays.
5. Educational Tools: In teaching electronics concepts and digital logic.
Its ability to decode binary-coded decimal input makes it versatile for numerical representation in electronic systems.

Package

The SN74LS47DR is packaged in a TSSOP (Thin Shrink Small Outline Package), specifically a 16-lead TSSOP. This compact package type is designed for surface mounting and provides a space-efficient solution for integrated circuits.

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