Microchip Technology, Inc. Memory AT28C256E-20FM/883

The AT28C256E-20FM/883 is a 256Kbit (32,768 x 8) parallel EEPROM memory device from Quarktwin Technology Ltd. It features a fast read access time of 150 ns and supports automatic page write operations with a page write cycle time of 3 ms or a maximum of 10 ms for 1 to 64 bytes. The device operates with a single 5V ± 10% supply and has low power dissipation, consuming 50 mA during active operation and 300 µA in CMOS standby mode. Data protection is ensured through hardware and software mechanisms, and the device includes data polling for end-of-write detection. It boasts high reliability with an endurance of 10,000 to 100,000 write cycles and a data retention period of up to 10 years. The AT28C256E-20FM/883 is compatible with both CMOS and TTL logic levels and is available in various military-grade package options, including 32-Lead CERDIP, Flatpack, CLCC, and 30-Pin PGA configurations.