The MAX6953 from Dallas Maxim is a compact cathode-row display driver that interfaces a microprocessor (like PIC or AVR) to four 5×7 dot matrix LED display trough an I2C compatible serial interface. The chip includes some features that can help us to handle easier the displaced data. These features are included on chip ASCII 104 character table and also fond data for 24 user definable characters, low-power shutdown mode, segment blinking that can be synchronized across multiple drivers if desired, test mode that forces all LEDs on (so that we can handle led problems) and also 16-Step digital brightness control that maybe differs from panel to panel.
In every MAX6953 we can set a 4 bit address via only two pins (AD1 and AD0) and with that way we can connect 16 drivers controlled from the same channel building huge LED displays. The chip is available in 36 pin SSOP and 40 pin DIP Packages.