upD4362BC-15

The NEC pPD4168 is an 8,t92 word by 8•bit NMOS XRAM designed to operate from a single +5V power supply. The NECi4PD4168 is termed an XRAM because it incor-porates some of the best features of both SRAMs (Non• multiplexed addresses, simple interface requirements) and DRAMs (the one-transistor core cell provides high density at low cost). The negative voltage substrate bias is internally generated and provides automatic and transparent operation. The incorporation of an internal refresh address counter and refresh multiplexer allows the use( to select one of three refresh modes. The self-refresh mode provides transparent refresh without system overhead. Internal latches for address, data, and chip select allow for use in systems incorporating multiplexed address/data buses.