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Logic Gate CD4511 4-Bit Binary Input BCD CC 7-Segment Display Driver

Logic Gate CD4511 4-Bit Binary Input BCD CC 7-Segment Display Driver

The CD4511 BCD to 7-Segment Display Driver is a CMOS integrated circuit designed to simplify the connection between digital logic circuits, microcontrollers, and common cathode 7-segment LED displays. It combines a 4-bit BCD latch, decoder, and display driver in a single chip, allowing binary-coded decimal inputs to be directly converted into readable numeric digits on a 7-segment display. The IC accepts a 4-bit BCD input (0000 to 1001) and controls the seven display segments automatically without requiring multiple logic gates or software decoding. It includes latch enable, lamp test, and blanking control inputs, making it suitable for counters, clocks, measurement devices, educational electronics, and embedded projects. 

Package Includes

  • 1 × CD4511 BCD to 7-Segment Display Driver IC
6.30 AED 6.30 AED (Tax included)

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Features

  • 4-bit BCD input to 7-segment display decoder and driver.
  • Designed for common cathode 7-segment LED displays.
  • Integrated BCD latch for storing input data.
  • Directly drives LED display segments without additional decoder circuits.
  • Supports Lamp Test function for checking display operation.
  • Includes Blanking input for disabling display output.
  • Latch Enable input allows display data storage and control.
  • High output drive capability for LED display applications.
  • Low power CMOS operation.
  • Compatible with Arduino, microcontrollers, counters, and digital logic circuits.

Principle of Operation

The CD4511 receives a 4-bit Binary Coded Decimal (BCD) signal through its input pins A, B, C, and D. The internal decoder converts this binary value into seven separate output signals that control the segments of a common cathode 7-segment display.

When a valid BCD value from 0000 to 1001 is applied, the IC activates the required segments to show the corresponding decimal digit from 0 to 9. The internal latch can store the input value, while the Lamp Test and Blanking pins provide additional control over display operation.

table summarizes the functions

Applications

  • Digital clocks and timers
  • Digital counters
  • Frequency meters
  • Voltage and current displays
  • Arduino 7-segment display projects
  • Educational electronics experiments
  • Industrial control panels
  • Measurement instruments
  • Embedded display systems
  • Logic circuit demonstrations

Pinout

CD4511 - BCD to 7-Segment Latch Decoder Driver

Pin Function
1 B Input (BCD)
2 C Input (BCD)
3 LT - Lamp Test Input
4 BI - Blanking Input
5 LE / Latch Enable
6 D Input (BCD)
7 A Input (BCD)
8 VSS - Ground
9 Segment E Output
10 Segment D Output
11 Segment C Output
12 Segment B Output
13 Segment A Output
14 Segment F Output
15 Segment G Output
16 VDD - Supply Voltage

Wiring

Connect the CD4511 between the digital controller and a common cathode 7-segment display. The four BCD input pins receive binary data from a microcontroller or logic circuit, while the seven output pins connect to the display segments through current-limiting resistors.

diagram of the CD4511 IC

CD4511 Pin Connection
A, B, C, D 4-bit BCD input source (Arduino, counter, logic circuit)
a-g Outputs 7-segment display segment pins through resistors
VDD Positive supply voltage
VSS Ground
LT Keep HIGH for normal operation
BI Keep HIGH for normal display operation
LE Control latch function or connect according to application

Specifications

Product Type BCD to 7-Segment Display Decoder Driver IC
IC Model CD4511 / CD4511B
Logic Family CMOS CD4000 Series
Input Type 4-Bit BCD Input
Display Type Common Cathode 7-Segment LED Display
Supply Voltage 5V, 10V, 15V
Output Capability High-output sourcing capability up to 25mA
Control Inputs Latch Enable, Lamp Test, Blanking
Package Type 16-Pin DIP
Applications LED display driving, counters, clocks, measurement systems

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