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DS1217M4-25 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1217M4-25 Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 8 page  DS1217M Nonvolatile Read/Write Cartridge DS1217M 030598 1/8 FEATURES • User-insertable • Data retention greater than 5 years • Capacity up to 512K x 8 • Standard bytewide pinout facilitates connection to JEDEC 28-pin DIP via 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 • Wide operating temperature range of 0°C to 70°C PIN ASSIGNMENT 3” A1 B1 Ground +5 Volts Write Enable Address 13 Address 8 Address 9 Address 11 Output Enable Address 10 Cartridge Enable Data I/O 7 Data I/O 6 Data I/O 5 Data I/O 4 Data I/O 3 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 No Connect Address 14 Address 12 Address 7 Address 6 Address 5 Address 4 Address 3 Address 2 Address 1 Address 0 Data I/O 0 Data I/O 1 Data I/O 2 Ground N Name Position Name See Mech. Drawings Section DESCRIPTION The DS1217M is a nonvolatile RAM designed for porta- ble applications requiring a rugged and durable pack- age. 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 accom- plished 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 con- nector can be used for direct mount to a printed circuit board. Alternatively, remote mounting can be accom- plished with a ribbon cable terminated with a 28-pin DIP plug. The remote method can be used to retrofit existing systems which have JEDEC 28-pin bytewide memory sites. |
Similar Part No. - DS1217M4-25 |
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Similar Description - DS1217M4-25 |
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