AT88SC018-SU-CM

Specialized ICS Overview

The AT88SC018-SU-CM is a CryptoCompanion™ security chip designed to partner with CryptoRF and CryptoMemory devices. It securely implements host algorithms, stores secrets, and verifies firmware digests using hardware-based cryptography including SHA-1 and F2 algorithms. The device features a 2-Wire Serial Interface (TWI) compatible with 5V logic, operating on a 2.7V to 3.6V supply. Key capabilities include mutual authentication, secure key management for up to 16 diversified keys, and nonvolatile counters. It provides high reliability with 100,000 write cycles, 10-year data retention, and ESD protection rated at 3,000 V HBM.

Specialized ICS Feature Summary

• Hardware-implemented SHA-1 and CryptoMemory/CryptoRF F2 algorithms for secure authentication and encryption
• Supports up to 16 sets of 64-bit diversified host keys and eight sets of two 24-bit passwords
• Includes four unidirectional nonvolatile counters with a maximum count of 6.4 million per counter
• Features metal shielding over memory, data scrambling, and voltage/frequency monitors to prevent systematic attacks

Specialized ICS Applications

• Networking and Communications
• Host Firmware Digest Verification
• Secure Authentication Key Management

Specialized ICS Procurement Notes

Verify the ordering suffix 'CM' indicates an unlocked state (Lock Byte value 00) and bulk packaging as specified in the datasheet. Confirm that the component meets RoHS standards and operates within the industrial temperature range of -40°C to +85°C. Ensure the system design accommodates the required power-up ramp rates and decoupling capacitor specifications for stable operation.

Specialized ICS Selection Notes

Select this component when a hardware-based companion chip is required to protect secrets used in communication with CryptoRF or CryptoMemory tags. It is suitable for applications needing flexible secret policies and hardware encryption engines to prevent algorithm disclosure. Verify that the system bus supports the 2-Wire interface protocol and that the 5V-compatible SDA/SCL pins align with the host microcontroller's voltage levels.

Specialized ICS Part Context

The AT88SC018 belongs to the CryptoCompanion™ series, acting as a mate to Atmel’s CryptoRF and CryptoMemory chips. It allows host systems to establish trusted links without directly revealing core secrets. The device integrates general-purpose cryptographic functions and secure EEPROM storage, enabling complex authentication scenarios while reducing the total bill of materials through integrated security features.

Specialized ICS Replacement Considerations

The AT88SC018-SU-CN serves as a variant with an Unlocked/Confidential lock state (Lock Byte value 10). Both parts share identical electrical characteristics and package dimensions. Selection depends on the desired initial memory access restrictions upon shipment.