AT88SC1608

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 Including 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


Specifications

Operating Temperature . . . . . . . . . . . . . −55 to +125
Storage Temperature . . . . . . . . . . . . . . .−65 to +150
Voltage on Any Pin with Respect
to Ground . . . . . . . . . . . . . . . . . . . . . −0.7V to VCC + 0.7V
Maximum Operating Voltage . . . . . . . . . . . . . . . . . .6.25V
DC Output Current . . . . . . . . . . . . . . . . . . . . . . . 5.0 mA


Description

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, AT88SC1608  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.