MAX7221 8 Segment LED Display Driver IC. it’s a simple method of controlling 64 LEDs in either matrix or numeric display form. They can also be chained together to control two or more units for even more 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.
Communication is achieved through a convenient 4-wire serial interface (supports SPI). Individual digits may be addressed and updated without rewriting the entire display. Only one external resistor is required to set the segment current for all LEDs.
Specification:
Model: MAX7221CNG
Encapsulation: DIP-24
Display type: LED
Configuration: 7 Segment + DP
Interface: 4-Wire Serial
Digits or Characters: 8 Digits
Current supply: 330mA
Voltage supply: 4 V to 5.5 V
