AT88SC1608 Card

One 128 x 8 (1K bit) Configuration Zone
Eight 256 x 8 (16K bits) User Zones
Low Voltage Operation: 2.7V to 5.5V

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)
 ISO 7816-3 Synchronous Protocol
 Answer-to-Reset Register
High Security Memory Including Anti-wire Tapping
– 64-bit Authentication Protocol*
– 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
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 for 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-wire tapping” 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.