Microchip Technology, Inc. Memory AT28HC256E-12DM/883

The AT28HC256E-12DM/883 is a military-grade 256-Kbit (32,768 x 8) high-speed paged parallel EEPROM. It features a fast read access time of 90 ns and supports automatic page write operations with a page write cycle time of 3 ms or a maximum of 10 ms, allowing for 1 to 64-byte page write operations. The device operates with a low power dissipation of 80 mA during active use and 3 mA in CMOS standby mode. Data protection is ensured through hardware and software mechanisms, along with data polling for end-of-write detection. The EEPROM is built using high-reliability CMOS technology, offering an endurance of 10,000 to 100,000 write cycles and a data retention period of up to 10 years. It operates on a single 5V ± 10% supply and is compatible with both CMOS and TTL inputs and outputs. The device is available in multiple package types, including 32-Lead CERDIP, 32-Lead Flatpack, 32-Lead CLCC, and 30-Pin PGA, making it suitable for various applications requiring reliable memory solutions.