SLE 4442 is the most common chip that used in security area. SLE 4442 provides a security code logic which controls the write/erase access to the memory. For this purpose the SLE 4442 contains a 4-byte security memory with an Error Counter EC(bit 0 to bit 2) and 3 bytes reference data. After power on the whole memory, except for the reference data, can only be read. Only after a successful comparison of verification data with the internal reference data the memory has the identical access functionality of the SLE 4442 until the power is switched off. After three successive unsuccessful comparisons the Error Counter blocks any subsequent attempt and hence any possibility to write and erase.
256X8 bit EEPROM organization
Irreversible byte-wise write protection of lowest 32 addresses (Byte 0….3)
32X1-bit organization of protection memory
Two-wire link protocol
End of processing indicated at data out put
Answer-to Reset acc. to ISO standard 7816-3
Programming time 2.5 ms per byte for both erasing and writing
Contact configuration and serial interface in accordance with ISO standard 7816
SLE4442 chip upgrade product is SLE5542,the function and feature of both chip is exactly same.
The Chip completely compatible with SLE4442 is FM4442. The performance of FM4442 is the same as SLE4442 chip. As the price of SLE4442 is relatively higher,so the FM4442 is used in many projects instead of SLE4442 chip.
Contact chip: SLE4442, SLE4428
Medical Insurance Card, Phone Card, Web Bar Card, Electronic Lock Card, Water Meter
Card, Game Card, Supermarket Card, Debit Card.
Card Craft :
Offset printing, embossing Gold/Silver number, inkjet/laser engraving serial number,
hot stamping serial number, metallic gold/silver printing, matt/glossy/sand blast
finish, signature panel, bar code/2D bar code printing, Magnetic strips, etc.