| Part Number | Description | Memory Type | Security Features |
| MAX66040E | ISO/IEC 14443 Type B-Compliant Secure Memory | EEPROM | SHA-1 ,Write-Only Secrets |
| MAX66040K | ISO/IEC 14443 Type B-Compliant Secure Memory | EEPROM | SHA-1 ,Write-Only Secrets |
| MAX66140E | ISO 15693-Compliant Secure Memory | EEPROM | SHA-1 ,Write-Only Secrets |
| MAX66140K | ISO 15693-Compliant Secure Memory | EEPROM | SHA-1 ,Write-Only Secrets |
