AT28HC256 is a high-performance Electrically Erasable and Programmable Read Only Memory with features including fast read access time, automatic page write operation, fast write cycle times, low power dissipation, hardware and software data protection, DATA polling, etc.
The document describes the Atmel AT28HC256, a high-performance Electrically Erasable and Programmable Read Only Memory (EEPROM). The device contains 256K of memory organized as 32,768 words by 8 bits and is manufactured with advanced nonvolatile CMOS technology. It offers access times to 70 ns with power dissipation of just 440 mW.
| Memory Capacity | 256K (32,768 words x 8 bits) |
|---|---|
| Read Access Time | 70 ns (Min) |
| Page Write Cycle Time | 3 ms or 10 ms Maximum |
| Active Current | 80 mA |
| Standby Current (CMOS) | 3 mA |
| Endurance | 10^4 or 10^5 Cycles |
| Data Retention | 10 Years |
The device operates on a single 5V + 10% supply.
Atmel incorporates both hardware and software features to protect the memory against inadvertent writes.