Common Memory card is a kind of contact mode IC card without logical encryption. The capacity of the chips ranges between 1kbit and 64kbit. Technical specification: AT24C01: 1k bit non-encryption card, just can read and write AT24C02: 2k bit non-encryption card, just can read and write AT24C04: 4k bit non-encryption card, just can read and write AT24C08: 8k bit non-encryption card, just can read and write AT24C16: 16k bit non-encryption card, just can read and write AT24C64: 64k bit non-encryption card, just can read and write Operating frequency: 1MHz(5V) 1ZHz(2.7V) 400KHz(1.8V) Operating voltage: 5V10%, min 1.8V if require ICC current: Read: max 1MA Write: max 3MA Operating temperature: 0-70, Exceed this range if required Write\erase: 1,000,000 times Data retention: 100yares ESD protection: 4000V Application area: Data storage, phone card, campus card and so on