GENERAL DESCRIPTION
The DS1217M is a nonvolatile RAM designed for portable applications requiring a rugged and durable package. The nonvolatile cartridge has memory capacities from 64k x 8 to 512k x 8. The cartridge is accessed in continuous 32k byte banks. Bank switching is accomplished under software control by pattern recognition from the address bus. A card edge connector is required for connection to a host system. A standard 30-pin connector can be used for direct mount to a printed circuit board. 

FEATURES
 User Insertable
 Data Retention Greater than 5 Years
 Capacity to 512k x 8
 Standard Bytewide Pinout Facilitates Connection to JEDEC 28-Pin DIP Through Ribbon Cable
 Software-Controlled Banks Maintain 32 x 8 JEDEC 28-Pin Compatibility
 Multiple Cartridges Can Reside on a Common Bus
 Automatic Write Protection Circuitry Safeguards Against Data Loss
 Manual Switch Unconditionally Protects Data
 Compact Size and Shape
 Rugged and Durable
 Operating Temperature Range: 0°C to +70°C