Description
BL7442LV is a IC Card chip (module) made by 1.2um CMOS EERPOM process. It has 256 byte EEPROM with logical encryption and function. It can be operated at low voltage.BL7442LV has two types, type A and type B.

FEATUREs
• 256 x 8 bit EEPROM organization
• Byte-wise addressing
• Irreversible byte-wise write protection of lowest 32 addresses (Byte 0 ……31)
• 32 x1 bit organization of protection memory
• Two-wire link protocol
• End of processing indicated at data output
• Answer-to-Reset according to ISO standard 7816-3(B type)
• EEPROM programming time 2.5 ms per byte for both Erasing and writing
• Minimum of 100,000 write/erase cycles
• Data retention time :>10 years
• Contacts configuration and serial interface according to ISO 7816 standard (synchronous transmission)
• BL7442LV A type: Data can only be read(include Answer-to-Reset )and changed after entry of the correct 3-byte Programmable security code
• BL7442LV B type: Data can only be changed after entry of the correct 3-byte Programmable security code