SLE4428 is one of the most common chip that used in security area. SLE4428 has a PSC verification logic. All the memory, except for the PSC, can always be read. The memory can be written or erased only after PSC verification.The error counter can always be written. After eight successive incorrect entries the error counter will block any subsequent attempt at PSC verification and hence any possibility to write and erase.
> 1024 x 8 bit EEPROM organization
> Byte-wise addressing
> Irreversible byte-wise write protection
> 1024 x 1 bit protection memory organization
> Serial three-wire bus
> End of programming indicated on data output
> Data retention for minimum of ten years
> Contact configuration and serial interface in accordance to
> ISO standard 7816 (synchronous transmission)
> Data can only be changed after entry of the correct
> 2-byte programmable security code (PSC)
SLE4428 chip upgrade product is SLE5528, the function and feature of both chip is exactly the same.
The chip completely compatible with SLE4428 is ISSI4428 or FM4428. The performance of ISSI4428 & FM4428 is the same as SLE4428 chip. As the price of SLE4428 is relatively higher, so the FM4428 or ISSI4428 is used in many projects instead of SLE4428 chip.
Shenzhen Zhengdafei Smart Card Co., Ltd is the professional smart card manufacturer since 2001, we can offer various smart cards with different chips, both plain blank printable cards or pre-printed cards as customer design are ok.
If you need the contact chip smart card with big chip as SLE4428/ISSI4428/FM4428, welcome contact us with your requests freely.