A modular circuit includes a memory module that has an array of memory cells, a communication module that has communication circuitry for coupling signals between the array and external circuitry, and an interconnection module that electrically interconnects the array on the memory module and the communication circuitry on the communication module. The memory and communication modules may also be mounted to the interconnection module. Alternatively, the memory and interface modules may be electrically interconnected and mounted to each other, in which case the interconnection module is not required.