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MAX7219EWG+T

ADIMAX7219EWG+T

Analog Devices Inc./Maxim Integrated
LED Driver 24-SOIC
NRND2,983 in stock
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Overview

The MAX7219EWG+T is a compact, common-cathode display driver that interfaces microprocessors to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. It features an integrated BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM that stores each digit. The device communicates via a 4-wire serial interface and operates across a 4V to 5.5V supply range.

Why Choose This Part

It significantly reduces MCU overhead by handling all display multiplexing and refreshing internally. The single-resistor current control simplifies design by eliminating the need for 64 individual current-limiting resistors. Its serial interface is compatible with SPI and QSPI, requiring only three I/O pins to control a large array of LEDs.

Applications

7-Segment Numeric Displays
Driving up to 8 digits of numeric data with decimal points for industrial instrumentation and clocks.
Bar-Graph Displays
Controlling LED level meters and status indicators without requiring constant processor refreshes.
LED Matrix Control
Managing an 8x8 monochrome LED matrix for simple scrolling text or symbolic status screens.
Panel Meters
Providing high-brightness readout capability for voltage, current, or temperature monitoring equipment.

Key Specifications

Interface 4-Wire Serial
Display Type LED
Configuration 7 Segment + DP
Mounting Type Surface Mount
Package / Case 24-SOIC (0.295", 7.50mm Width)
Current - Supply 330 mA
Voltage - Supply 4V ~ 5.5V
Digits or Characters 8 Digits
Operating Temperature -40degC ~ 85degC
Supplier Device Package 24-SOIC

Getting Started

Connect the serial data (DIN), clock (CLK), and load (CS) pins to your microcontroller SPI bus. Use a single external resistor connected to the ISET pin to set the peak segment current for all LEDs. Libraries are widely available for Arduino and other platforms to simplify the configuration of the internal scan-limit and intensity registers.