Intelligent 237–Bit EEPROM Counter
for > 20000 Units with Security Logic and
High Security Authentication
Datasheet : SLE6636 36E

Your Security is Our Priority. Dismiss
Infineon SLE6636/36E Card, Infineon SLE6636/36E Card, Infineon SLE6636/36E Eurochip smart card, id Infineon SLE6636/36E, Infineon SLE6636/36E smart card,
Intelligent 237–Bit EEPROM Counter
for > 20000 Units with Security Logic and
High Security Authentication
SLE 6636/36E is designed for applications in prepaid telephone cards. The chip consists of an
EEPROM memory of 221 bit, a ROM of 16 or 24 bits respectively, a control/security unit and a
special computing unit for chip authentication.

SLE4428 Secure Memory Card is one of the most popular "Smart Memory Cards" in the world. This chip includes an intelligent 256-Byte EEPROM with Write Protect Function and Programmable Security Code (PSC). The chip contains an EEPROM organized 1024 x 8 bit offering the possibility of programmable write protection for each byte. Reading of the whole memory is always possible. The memory can be written and erased byte by byte. Input data and the contents of the adressed byte are compared so that only bits are written which were not written before. Erasing is only possible byte-wise, even if only one bit is to be erased, but bits may be written individually. Each byte can be write/eraseprotected individually by setting a protect bit (EEPROM → ROM). The protect bit is only one time programmable and cannot be erased.