4-Digit, 7-Segment Serial-In/Parallel-Out LED Display Driver

The MAX72044B+ is a 4-digit, 7-segment serial-in/parallel-out LED display driver with a built-in BCD decoder. It is designed to drive common-anode LED displays with up to 20mA of current per segment. The MAX72044B+ has a built-in scan limiter that automatically limits the number of active segments to eight, which reduces power consumption.

The MAX72044B+ is easy to use and requires only four connections to a microcontroller: serial data (DIN), serial clock (SCK), chip select (CS), and shift register clock (SRCLK). The MAX72044B+ can be used with a variety of microcontroller types, including 8-bit, 16-bit, and 32-bit microcontrollers.

The MAX72044B+ is ideal for a wide range of applications, including:

• Digital clocks
• Timers
• Scoreboards
• Thermometers
• Multimeters
• Industrial control systems
• Consumer electronics

Features

• 4-digit, 7-segment serial-in/parallel-out LED display driver
• Built-in BCD decoder
• Built-in scan limiter
• Drives common-anode LED displays with up to 20mA of current per segment
• Easy to use
• Requires only four connections to a microcontroller
• Can be used with a variety of microcontroller types
• Ideal for a wide range of applications

Benefits

• The MAX72044B+ is a cost-effective and easy-to-use LED display driver.
• The built-in scan limiter reduces power consumption and extends battery life.
• The MAX72044B+ can be used with a variety of microcontroller types, making it a versatile solution for a wide range of applications.

Applications

• Digital clocks
• Timers
• Scoreboards
• Thermometers
• Multimeters
• Industrial control systems
• Consumer electronics

How to Use

To use the MAX72044B+, connect the DIN, SCK, CS, and SRCLK pins to the corresponding pins on the microcontroller. Then, write the desired data to the MAX72044B+ using the serial interface. The MAX72044B+ will automatically decode the data and drive the LED display.

Example

The following code shows how to use the MAX72044B+ to display the number 1234 on a 4-digit, 7-segment LED display:

// Define the pin assignments
#define DIN 10
#define SCK 11
#define CS 12
#define SRCLK 13

// Initialize the MAX72044B+
void setup() {
  pinMode(DIN, OUTPUT);
  pinMode(SCK, OUTPUT);
  pinMode(CS, OUTPUT);
  pinMode(SRCLK, OUTPUT);

  // Set the chip select pin to low to enable the MAX72044B+
  digitalWrite(CS, LOW);
}

// Display the number 1234 on the LED display
void loop() {
  // Write the data to the MAX72044B+
  digitalWrite(DIN, HIGH);
  digitalWrite(SCK, HIGH);
  shiftOut(DIN, SCK, MSBFIRST, 0x01); // Display the number 1
  digitalWrite(DIN, LOW);
  digitalWrite(SCK, LOW);

  digitalWrite(DIN, HIGH);
  digitalWrite(SCK, HIGH);
  shiftOut(DIN, SCK, MSBFIRST, 0x02); // Display the number 2
  digitalWrite(DIN, LOW);
  digitalWrite(SCK, LOW);

  digitalWrite(DIN, HIGH);
  digitalWrite(SCK, HIGH);
  shiftOut(DIN, SCK, MSBFIRST, 0x03); // Display the number 3
  digitalWrite(DIN, LOW);
  digitalWrite(SCK, LOW);

  digitalWrite(DIN, HIGH);
  digitalWrite(SCK, HIGH);
  shiftOut(DIN, SCK, MSBFIRST, 0x04); // Display the number 4
  digitalWrite(DIN, LOW);
  digitalWrite(SCK, LOW);

  // Disable the MAX72044B+
  digitalWrite(CS, HIGH);
}