An 8kbit RAM + I/O Peripheral Circuit for Microprocessors

An 8 kbit RAM + I/O peripheral circuit for microprocessors has been realized in a scaled NMOS single-layer poly technology. Cycle time is 250 ns, counter frequency is 10 MHz, chip size is 27.6 mm² and the supply current is approx. 200 mA, with 5 V supply voltage.