IC CD4511 – BCD to 7-Segment Latch/Decoder/Driver

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The IC CD4511 is a BCD to 7-segment latch/decoder/driver. It converts binary-coded decimal (BCD) input into a format suitable for driving a 7-segment display, while also including latch functionality to hold the output state. This IC is used in digital displays to show numerical values, making it ideal for applications like digital clocks, counters, and numeric displays.

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IC CD4511 – BCD to 7-Segment Latch/Decoder/Driver

Overview

The CD4511 is a BCD (Binary-Coded Decimal) to 7-segment latch/decoder/driver IC. It converts binary-coded decimal input data into the corresponding decimal digits for display on a 7-segment LED display. The IC is designed for use in applications where numerical data needs to be displayed, such as digital clocks, counters, and other electronic displays.

Features

  • BCD to 7-Segment Decoding: Converts 4-bit BCD input data into 7-segment display outputs.
  • Latch Functionality: Stores the BCD input data for stable display output.
  • High-Current Drive Capability: Can directly drive 7-segment LEDs with sufficient current.
  • Active High Outputs: Outputs are active high, suitable for common anode 7-segment displays.
  • Standard Pin Configuration: Compatible with various circuit designs.

Pin Configuration

The IC CD4511 is typically available in a 16-pin Dual In-line Package (DIP) format. The pinout is as follows:

  • Pin 1: Output a
  • Pin 2: Output b
  • Pin 3: Output c
  • Pin 4: Output d
  • Pin 5: Output e
  • Pin 6: Output f
  • Pin 7: Output g
  • Pin 8: VSS (Ground)
  • Pin 9: Enable (Decimal Point)
  • Pin 10: D0 (BCD Data Input 0)
  • Pin 11: D1 (BCD Data Input 1)
  • Pin 12: D2 (BCD Data Input 2)
  • Pin 13: D3 (BCD Data Input 3)
  • Pin 14: LE (Latch Enable)
  • Pin 15: BL (Blanking)
  • Pin 16: VDD (Positive Supply Voltage)

Working Principle

The CD4511 functions as follows:

  1. BCD Input: The IC receives a 4-bit binary-coded decimal input on pins D0 through D3.
  2. Latch Function: When the Latch Enable (LE) pin is activated, the current BCD data is latched and held in the IC for display purposes.
  3. 7-Segment Output: The IC converts the latched BCD data into signals that drive the corresponding segments of a 7-segment display.
  4. Decimal Point Control: The Enable (Decimal Point) pin controls the decimal point display if needed.
  5. Blanking: The Blanking pin can be used to turn off the display for certain conditions.

Applications

  • Digital Displays: Used in digital clocks, counters, and other devices requiring numeric displays.
  • Electronic Meters: Drives numerical readouts in multimeters, voltmeters, and other measuring instruments.
  • Counters: Converts binary counters into readable decimal digits for output displays.
  • Educational Kits: Commonly used in educational electronics kits to demonstrate digital display concepts.

Example Circuit

  • Basic Display Driver: Connect the BCD input pins to a BCD counter and use the CD4511 to drive a 7-segment display.
  • Decimal Counter: Use the IC in a digital clock circuit to display hours, minutes, or seconds on 7-segment displays.
  • Data Display: Interface with a microcontroller to display numerical data on a 7-segment display.

Advantages

  • Direct Drive Capability: Can drive 7-segment LEDs directly without additional driver circuitry.
  • Versatility: Suitable for a variety of numerical display applications.
  • Latch Function: Holds data for stable display output, even if input changes.
  • High Current Drive: Capable of sourcing sufficient current for bright 7-segment displays.
  • Ease of Use: Simple integration into digital display circuits with standard pin configuration.

Conclusion

The IC CD4511 is a versatile and essential component for converting binary-coded decimal data into readable 7-segment display outputs. Its built-in latch functionality, high-current drive capability, and ease of use make it an ideal choice for applications in digital clocks, counters, and other electronic displays. Whether used in educational projects or complex electronic systems, the CD4511 provides reliable performance and straightforward integration.

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Sold By : Computronics Lab SKU: ic-cd4511 Category: Tags: ,

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