MAX7219CNG 8-Digit 7-Segment LED Display Driver DIP-24

MAX7219CNG 8-Digit 7-Segment LED Display Driver DIP-24

The MAX7219CNG is an 8-digit, 7-segment LED display driver DIP-24 is the IC housed in a 24-pin DIP package. It is designed for serial interfacing with microcontrollers and supports the control of up to 64 individual LEDs or eight 7-segment digits. The IC integrates a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8×8 static RAM to store each digit’s data. This chip simplifies LED display control by reducing the number of microcontroller pins needed to drive large displays, providing individual LED segment control, digital and analog brightness adjustment, and a low power shutdown mode that retains data. The MAX7219CNG operates with a supply voltage typically around 5V and supports a serial interface with data rates up to 10 MHz. It is widely used in applications such as digital clocks, counters, panel meters, bar-graph displays, and other LED matrix displays. Its slew-rate limited segment drivers minimize electromagnetic interference, enhancing display quality and reliability. The device is suitable for common-cathode LED configurations. The MAX7219 is an IC designed to control a 8×8 LED MATRIX. The IC is serial input common-cathode (Common Negative) display drivers that interface microprocessors (or microcontroller) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs.

Specifications

How to use MAX7219 IC

The chip is used similar to any shift register. First we will send serial data to chip bit by bit .once all data is sent we will tell chip to shift this serial data to output by enabling CS pin. The step by step procedure of working goes as below.

• First connect DIN, CS and CLK pin. These three pins are important to controlling chip.
• Next is selecting resistor for ISET pin. As we know that there is no standard parameter for segment displays in market. They have different voltage and current setting. In order to drive the display without error we will choose the appropriate resistor by using the following table.

• There are two ways to use this chip. One is to follow the instructions given in datasheet to send the data bit by bit. Second way is to use libraries previously written for this chip. Using the libraries is easiest way to get the required result. With libraries you can just enter the required data to send without worrying anything.
• We will send data to the chip through DIN pin. The data is sent BIT by BIT by setting the clock of chip for each bit. The Chip stores the serial data its registers until all data is received. After completing data sending we will set the CS pin for the chip to shift all data stored in its register to the output.
• Once the data is put out by the chip it will light up the corresponding LEDs to display the result.

Applications

• Digital Displays Used in numeric and alphanumeric LED displays for clear numeric presentation.
• Digital Clocks Facilitates precise control and multiplexing for clock digit displays.
• Control Panels Used in industrial and consumer equipment panels for displaying status, data, or settings.
• Digital Signage Suitable for driving up to 8 digits or bar graphs for information display in commercial signage.
• LED Matrix Displays Supports matrix display control by driving up to 64 individual LEDs.
• Panel Meters Ideal for numeric readouts in measuring instruments and meters.
• Bar-Graph Displays Controls segmented bar graph indicators for visual status or level representation.

Package Contents

• 1 x  MAX7219CNG 8-Digit 7-Segment LED Display Driver DIP-24

Datasheet

• MAX7219