AT88SC12816C-MJ

Specialized ICS Overview

The AT88SC12816C-MJ is a CryptoMemory secure EEPROM module providing 128 Kbit (16 Kbyte) of user memory organized into sixteen 1-Kbyte zones. It integrates a cryptographic engine for mutual authentication and stream encryption using four key sets. The device supports ISO 7816-3 asynchronous T=0 protocol and synchronous 2-wire serial interface, operating within a 2.7V to 5.5V supply range. It features a 2-Kbit configuration zone with programmable access rights, passwords, and anti-tearing protection. Packaged in an M2-J Smart Card Module format, it ensures high reliability with 10-year data retention and 100,000 write cycle endurance.

Specialized ICS Feature Summary

• 128-Kbit User Memory: Divided into sixteen 1-Kbyte zones with individually programmable security access rights.
• High Security Features: Includes 64-bit mutual authentication protocol, encrypted checksums, stream encryption, and voltage/frequency monitors.
• Smart Card Compliance: Supports ISO 7816 Class A/B operation and asynchronous T=0 protocol with speeds up to 153,600 baud.
• Configuration Zone: Contains 2-Kbit EEPROM for keys, passwords, and codes, including a 37-byte OTP area.

Specialized ICS Applications

• Embedded smart card systems requiring secure nonvolatile storage.
• Multi-application environments utilizing multiple zones and key sets.
• Systems needing dynamic symmetric mutual authentication between host and device.
• Secure storage for sensitive system or user information in embedded controllers.

Specialized ICS Procurement Notes

Verify the specific ordering suffix to confirm package type and temperature range. The -MJ suffix denotes the M2-J Smart Card Module compatible with ISO 7816 standards. Ensure compatibility with the target reader's voltage class (Class A 5V or Class B 3V) and protocol requirements (T=0 vs. 2-wire). Confirm that the module version matches the required communication mode, as some variants support only 2-wire while others support both T=0 and 2-wire modes.

Specialized ICS Selection Notes

Select this component when 128 Kbit of secure memory is required with integrated cryptographic capabilities. Choose the -MJ module variant for applications requiring standard ISO 7816 smart card form factors. Consider the -PU or -SU variants if surface-mount or through-hole plastic packages are preferred for embedded 2-wire serial applications. Ensure the design supports the necessary personalization process to configure zones, keys, and fuses before deployment.

Specialized ICS Part Context

The AT88SC12816C belongs to the CryptoMemory family, which offers user memory densities ranging from 1-Kbit to 256-Kbit. This specific model provides 128 Kbit of capacity, positioning it between smaller 16-Kbit/32-Kbit devices and larger 256-Kbit modules. It shares architectural similarities with other members like the AT88SC0808C but scales the user memory and configuration space to accommodate more complex multi-application smart card scenarios.

Specialized ICS Replacement Considerations

Direct replacements within the same family include AT88SC1616C or AT88SC25616C depending on memory density needs, provided the package and interface protocols match. For pin-compatible swaps in embedded designs, verify that the alternative device supports the same 2-wire serial interface and voltage ranges. Note that the -MJ module is distinct from plastic packages; physical replacement requires matching the M2-J module footprint and contact layout.

Specialized ICS FAQ

What is the difference between the asynchronous and synchronous modes?

Asynchronous mode uses the ISO 7816-3 T=0 protocol, suitable for standard smart card readers. Synchronous mode uses a 2-wire serial interface (I2C-like), defaulting upon power-up if RST is not driven low, intended for embedded controller applications.

How does the anti-tearing function work?

Anti-tearing protects data integrity during power loss by first writing data to a buffer zone. If power fails during the second write to the destination, the device automatically recovers the data from the buffer upon the next power-up.

Can the security fuses be reset after blowing?

No. The three security fuses (Module Manufacturer, Card Manufacturer, Card Issuer) are one-time programmable. Once blown, they lock the configuration memory permanently, preventing further changes to keys and access rights.