MAX7221 8-Digit LED Display Driver IC – SMD-24

Description

The MAX7221 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 connects microprocessors to these displays via a standard 4-wire serial interface.

This IC 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. The MAX7221 is specifically optimized for applications requiring low electromagnetic interference (EMI) and is compatible with SPI, QSPI, and MICROWIRE standards.

Note: Product images are for reference only. The actual product may vary in appearance depending on manufacturer marking.

Features

• Serial Interface: 10MHz serial interface compatible with SPI, QSPI, and MICROWIRE.
• Versatile Output: Drives up to 8 digits or 64 individual LEDs.
• Control: Individual segment control, BCD code-B decoding, and brightness control.
• Power Efficient: 150µA low-power shutdown mode (data retained).
• Display Stability: Segment-blinking control and segment-driver slew-rate limiting for reduced EMI.

Benefits

• Reduces the number of microcontroller pins required to control complex displays.
• Simplifies code and hardware design for LED matrix and display projects.
• Compatible with common-cathode 7-segment displays.
• Slew-rate limited segment drivers minimize noise and interference in sensitive circuits.

Applications

• Digital Clocks and Timers
• Bar-Graph Displays
• Industrial Control Panels
• LED Dot Matrix Displays
• Panel Meters and Instrumentation

Package Includes

• 1 x MAX7221 8-Digit LED Display Driver IC (SMD-24)

Specifications