produce many kinds of contact cards with different material including ABS, PVC etc. Our main available chips are SLE4442, SLE4428, SLE5542, SLE5528 and the compatible chips (ISSI 4442, ISSI4428, FM4442, FM4428, FM5542, FM5528, BL7442, BL7428)for your different reference.
Here is some information for your quick view.

Product name: SLE4442/SLE5542 cards
Mateial: PVC (white or transparent), ABS, PET
Surface: Glossy or matte
Size: 86*54mm or customized size
Thickness: 0.84mm
Prox. Weight: 6 gram
Chip name: SLE4442, SLE5542
Working temp.: -25º Cto 50º C
Storage temp.: -25º Cto 50º C
Package: Wrappend in blocks of 50 or 100 cards or customrised package.

SLE 5542
SLE 5542 replaces SLE 4442.
SLE 5542 is 100% functional compatible to SLE 4442 256 x 8-bit EEPROM organization of Data Memory 32 x 1-bit Protection Memory
Byte-wise write protection of first 32 addresses (byte 0...31) of Data Memory Manufacturer Code for unique identification of application Data Memory (addresses 0...255) alterable only after verification of 3 Byte Programmable Security Code (PSC) Advanced CMOS-technology optimised for security layout