AT88SC0204CA-SU

Specialized ICS Overview

The AT88SC0204CA is a secure memory device from the CryptoMemory family, providing 2-Kbit (256-byte) EEPROM user memory organized into four 64-byte zones. It features a 2-Kbit configuration zone with 37 bytes of OTP and 160 bytes for keys/passwords. The chip supports ISO 7816 Class B asynchronous T=0 protocol and synchronous 2-wire serial interface (TWI) up to 1 MHz. Operating voltage ranges from 2.7V to 3.6V, with input pins compatible up to 5.5V. Security includes 64-bit mutual authentication, MAC, stream encryption, anti-tearing, and voltage/frequency monitors.

Specialized ICS Feature Summary

• 2-Kbit EEPROM user memory divided into four independently configurable 64-byte zones
• Supports ISO 7816-3 asynchronous T=0 protocol and synchronous 2-wire serial interface
• Integrated cryptographic engine for mutual authentication, MAC, and stream encryption
• Anti-tearing function ensures data integrity during power loss events

Specialized ICS Applications

• Smart card modules requiring ISO 7816 compliance
• Embedded systems needing secure nonvolatile storage for sensitive information
• Multi-application environments utilizing multiple key sets and passwords

Specialized ICS Procurement Notes

Verify package availability as the AT88SC0204CA-SU variant may be discontinued or subject to limited supply. Confirm that the specific ordering suffix matches the required communication protocol (ISO vs TWI only) and temperature grade. Check current distributor stock levels and lead times due to potential manufacturing changes or end-of-life status within the product line.

Specialized ICS Selection Notes

Select this component when 2-Kbit secure storage with dual-mode interface capability is required. Ensure the host system can support either the asynchronous T=0 smart card protocol or the synchronous 2-wire interface, as mode selection is fixed at power-up. Verify that the 2.7V to 3.6V operating voltage range aligns with the target application's power supply constraints.

Specialized ICS Part Context

This device belongs to the Atmel Microchip CryptoMemory family, which offers scalable secure memory solutions from 1-Kbit to 8-Kbit. The AT88SC0204CA specifically targets applications requiring robust security features without the complexity of a full microprocessor-based smart card OS, serving as a drop-in replacement for standard serial EEPROMs in terms of pinout while adding cryptographic capabilities.

Specialized ICS Replacement Considerations

Direct replacements must match the 2-Kbit capacity, 8-lead SOIC/TSSOP/PDIP packages, and dual-interface support. Consider other members of the AT88SC0xxx series for different memory sizes. Verify compatibility with existing authentication protocols and key management structures before substitution.