DESCRIPTION
The M66222 is a mail box that incorporates two complete CMOS shared memory cells of 128 × 8-bit configuration using high-performance silicon gate CMOS process technology, and are equipped with two access ports of A and B.

FEATURES
• Memory configuration of 128 × 8 bits × 2 memory areas
• High-speed access, address access time 40ns (typ.)
• Complete asynchronous accessibility from ports A and B
• Fixed read/write access ports for memory
• Completely static operation
• Low power dissipation CMOS design
• 5V single power supply
• TTL direct-coupled I/O
• 3-state output for I/O pins

APPLICATION
   Inter-MCU data transfer memory, communication buffer memory