SLE4442 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. These 3 bytes as a whole are called Programmable Security Code (PSC). 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 4432 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.
> 256 × 8-bit EEPROM organization
> Byte-wise addressing
> Irreversible byte-wise write protection of lowest 32 addresses (Byte 0 ... 31)
> 32 × 1-bit organization of protection memory
> Two-wire link protocol
> End of processing indicated at data output
> 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/ISSI4442. The performance of FM4442/ISSI4442 is the same as SLE4442 chip. As the price of SLE4442 is relatively higher, so the FM4442/ISSI4442 is used in many projects instead of SLE4442 chip.
SLE4442/ISSI4442/FM4442 chip cards are the contact smart cards with smaller chip than SLE4428/ISSI4428/FM4428.
When customer needs the contact smart card, please kindly clearify the chip type first, also the expected quantity. Shenzhen Zhengdafei Smart Card Co., Ltd could offer various blank or pre-printed contact smart cards with different chip, all of our cards are produced in dust-free workshop and 100% inspected before package to ensure the quality.
Contact us today to customize your own smart cards with factory price.