ACS offers a variety of memory cards that may be used with a range of smart card readers/writers. These are the SLE5542 and the SLE5528 memory cards.

SLE5542 Memory Card Features:

• SLE5542 is 100% functional compatible to SLE 4442
• Intelligent 256-Bytes EEPROM
• Write-protect function
• Programmable Security Code (PSC)
• EEPROM is organized 256 x 8 bit offering the possibility of programmable write protection for each byte
• Data Memory alterable only after verification of 3-Byte Programmable Security Code (PSC)

SLE5528 Memory Card Features:

• SLE5528 is 100% functional compatible to SLE 4428
• 1K byte EEPROM
• Write-protect function
• Programmable Security Code verification logic
• All the memory, except for the PSC, can always be read
• The memory can be written or erased only after PSC verification
• After eight successive incorrect entries the error counter will block any subsequent attempt at PSC verification and hence any possibility to write and erase