MAX 7219 IC Serially Interface 8-Digit LED Display Driver

10MHz Serial Interface

Individual LED Segment Control

150µA Low-Power Shutdown (Data Retained)

Digital and Analog Brightness Control

24-Pin DIP Package

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The MAX7219 is a compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Included on-chip are a 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 compatible with SPI, QSPI, and MICROWIRE, and has slew-rate-limited segment drivers to reduce EMI.