The SLE4442 is a widely used smart card IC known for its simplicity and security features. Here are its key technical characteristics:
🧠 Memory & Structure
- 256 bytes of EEPROM for user data
- 32 bytes of security memory
- 3-byte programmable security code (PSC) for write protection
- Write endurance: 100,000 cycles
- Data retention: 10 years
🔐 Security Features
- PIN-based access control: Write operations require correct PSC
- Error counter: 3 attempts before card locks write access
- Anti-tearing mechanism: Protects data during power loss
📡 Communication & Interface
- Contact interface: ISO/IEC 7816 compliant
- Protocol: Asynchronous, T=0
- Supply voltage: 5V ±10%
- Clock frequency: Up to 5 MHz
- Operating temperature: –25 °C to +85 °C
🧩 Applications
Used in loyalty cards, prepaid cards, access control, and ID systems where moderate security and low cost are key.
