8 Bit - IO Expander 
5V - 8MHz - PLCC44
                                16 Bit - IO Expander - I2C serial interface
5V - 10MHz - SOIC 28
                                8 Bit - IO Expander - SPI serial interface
5V - 10MHz - SOIC 18
                                16 Bit - IO Expander - SPI serial interface
5V - 10MHz - SOIC 28