AT88SC0204C Card


AT88SC0204C Card

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AT88SC0204C, CryptoMemory 2 Kbit

• One of a Family of 9 Devices with User Memories from 1 Kbit to 256-Kbit
• 2-Kbit (256 Bytes) EEPROM User Memory

– Four 64-byte (512-bit) Zones
– Self-timed Write Cycle
– Single Byte or 16-byte Page Write Mode
– Programmable Access Rights for Each Zone

• 2-Kbit Configuration Zone

– 37-byte OTP Area for User-defined Codes
– 160-byte Area for User-defined Keys and Passwords

• High Security Features

– 64-bit Mutual Authentication Protocol (Under License of ELVA)
– Encrypted Checksum
– Stream Encryption
– Four Key Sets for Authentication and Encryption
– Eight Sets of Two 24-bit Passwords
– Anti-tearing Function
– Voltage and Frequency Monitor

• Smart Card Features

– ISO 7816 Class A (5V) or Class B (3V) Operation
– ISO 7816-3 Asynchronous T = 0 Protocol (Gemplus® Patent) *
– Multiple Zones, Key Sets and Passwords for Multi-application Use
– Synchronous 2-wire Serial Interface for Faster Device Initialization *
– Programmable 8-byte Answer-To-Reset Register
– ISO 7816-2 Compliant Modules

• Embedded Application Features

– Low Voltage Operation: 2.7V to 5.5V
– Secure Nonvolatile Storage for Sensitive System or User Information
– 2-wire Serial Interface
– 1.0 MHz Compatibility for Fast Operation
– Standard 8-lead Plastic Packages, Green Compliant (exceeds RoHS)
– Same Pinout as 2-wire Serial EEPROMs

• High Reliability

– Endurance: 100,000 Cycles
– Data Retention: 10 years
– ESD Protection: 4,000V min


The AT88SC0204C member of the CryptoMemory® family is a high-performance secure memory providing 2 Kbits of user memory with advanced security and cryptographic features built in. The user memory is divided into four 64-byte zones, each of which may be individually set with different security access rights or effectively combined together to provide space for 1 to 4 data files. 

Smart Card Applications
The AT88SC0204C provides high security, low cost, and ease of implementation without the need for a microprocessor operating system. The embedded cryptographic engine provides for dynamic and symmetric mutual authentication between the device and host, as well as performing stream encryption for all data and passwords xchanged between the device and host. Up to four unique key sets may be used for these operations. The AT88SC0204C offers the ability to communicate with virtually any smart card reader using the asynchronous T = 0 protocol (Gemplus Patent) defined in ISO 7816-3. 

Embedded Applications
Through dynamic and symmetric mutual authentication, data encryption, and the use of encrypted checksums, the AT88SC0204C provides a secure place for storage of sensitive information within a system. With its tamper detection circuits, this information remains safe even under attack. A 2-wire serial interface running at 1.0 MHz is used for fast and efficient communications with up to 15 devices that may be individually addressed. The AT88SC0204C is available in industry standard 8-lead packages with the same familiar pinout as 2-wire serial EEPROMs.


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