Description
The MAX7219 is a compact, serial-interfaced, common-cathode display driver that simplifies the process of controlling 7-segment LED displays (up to 8 digits), bar-graph displays, or 64 individual LEDs. It interfaces microprocessors to displays via a standard 4-wire serial interface, making it highly efficient for projects requiring multiple character outputs.
The device includes an on-chip BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8×8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. It is widely used in hobbyist and industrial applications for its ease of use with platforms like Arduino, Raspberry Pi, and other microcontrollers.
Note: Product images are for reference only. The actual product may vary in appearance depending on manufacturer marking. Please refer to the datasheet available in the Attachment section for complete electrical characteristics and wiring diagrams.
Features
- Serial Interface: 10MHz serial interface compatible with SPI, QSPI, and MICROWIRE standards.
- Versatile Output: Drives up to 8 digits or 64 individual LEDs.
- Control: Features individual segment control, BCD code-B decoding, and software-controlled brightness.
- Power Efficient: 150µA low-power shutdown mode (data retained).
- Display Stability: Includes segment-blinking control and segment-driver slew-rate limiting to minimize electromagnetic interference (EMI).
Benefits
- Greatly reduces the number of microcontroller pins required to drive complex LED displays.
- Simplifies both code and hardware layout for LED matrix and numerical display projects.
- Compatible with common-cathode 7-segment displays.
- Integrated current-limiting resistor control simplifies power management.
Applications
- Digital Clocks, Thermometers, and Counters
- Bar-Graph Displays
- Industrial Control Panels
- LED Dot Matrix Displays
- Panel Meters and Instrumentation
Package Includes
- 1 x MAX7219 8-Digit LED Display Driver IC (SMD-24)
Specifications
| Parameter | Specification |
|---|---|
| Product Name | MAX7219 |
| Device Type | 8-Digit LED Display Driver |
| Package / Case | SMD-24 (SOIC-24) |
| Interface | SPI, QSPI, MICROWIRE |
| Mounting Type | Surface Mount (SMD) |
| Shipping Weight | 0.001 kg |
| Shipping Dimensions | 4 × 4 × 1 cm |
