The AT88SC1608 provides 17,408 bits of serial EEPROM memory organized as one configuration zone of 128 bytes and eight user zones of 256 bytes each.

This device is optimized as a “secure memory” for the smart card market, secure identification for electronic data transfer, or components in a system, without the requirement of an internal microprocessor.

The embedded authentication protocol allows the memory and the host to authenticate each other. When this device is used with a host which incorporates a microcontroller (e.g., AT89C51, AT89C2051, AT90S1200), the system provides an “anti-wiretapping” configuration. The device and the host exchange “challenges” issued from a random generator and verify their values through a specific cryptographic function included in each part. When both agree on the same result, the access to the memory is permitted.

 

Features

 One 128 x 8 (1K bit) Configuration Zone 

• Eight 256 x 8 (16K bits) User Zones

• Low Voltage Operation: 2.7V to 5.5V

• Two-wire Serial Interface

• 16-byte Page Write Mode

• Self-timed Write Cycle (10 ms max)

• Answer-to-Reset Register

• High Security Memory In cluding Anti-wiretapping

       – 64-bit Authentication Protocol (under exclusive patent license from ELVA)

       – Authentication Attempts Counter

       – Eight Sets of Two 24-bit Passwords

       – Specific Passwords for Read and Write

       – Sixteen Password Attempts Counters

       – Selectable Access Rights by Zone       

• ISO Compliant Packaging
• High Reliability

         – Endurance: 100,000 Cycles

         – Data Retention: 100 Years

         – ESD Protection: 4,000V (min)

• Low-power CMOS

                Chip: Atmel AT88SC1608