Mikroe MCU CARD for PIC PIC18F97J94 allows for the simple installation and replacement of the microcontroller unit (MCU) on a development board. The card is equipped with an MCU Card socket. This new MCU Card standard ensures compatibility between development boards and any supported MCUs, regardless of pin number and compatibility. MCU Cards are equipped with two 168-pin mezzanine connectors, allowing them to support MCUs with extremely high pin count.