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