The MAX7219 is an integrated serial input / output co-cathode display driver that connects a microprocessor to an 8-digit 7-segment digital LED display or a bar graph display or 64 independent LEDs. Which includes an on-chip B-type BCD encoder, multi-scan circuit, segment word drive, as well as an 8 * 8 static RAM used to store any data. Only an external register is used to current the segment for each LED.
A convenient four-wire serial interface can be connected to all common microprocessors. Any data can be addressed at the time of updating without rewriting any displays. The MAX7219 also allows the user to select or not code for each data.
The entire device includes a 150μA low power shutdown mode, analog and digital brightness, a scan limit register allows the user to display 1-8 bits of data, and a test mode for all LEDs to light.
Digital tube and PCB board between the use of 2.54mm pitch round hole pin connection, you can easily replace digital tube!