AT88SC118-SH-CM-T

Specialized ICS Overview

The AT88SC118-SH-CM-T is a CryptoCompanion security chip designed to mate with Atmel CryptoRF and CryptoMemory devices. It securely implements host algorithms, stores secrets, and verifies firmware digests using hardware-based protection. The device features a 512-byte EEPROM, SHA-1 cryptographic processing, and a high-quality random number generator. It operates on a 2-Wire Interface (TWI) compatible with SMBus standards, supporting a supply voltage range of 2.7V to 3.6V. Packaged in an 8-lead SOIC, it provides robust security against systematic attacks through delay penalties, reset locking, and active shielding.

Specialized ICS Feature Summary

• Hardware-implemented SHA-1 algorithm and 64-bit Mutual Authentication Protocol for secure communication with CryptoRF/CryptoMemory chips.
• 512-byte nonvolatile EEPROM with configurable user data area, four unidirectional up counters, and encrypted secret storage.
• Integrated high-quality Random Number Generator (RNG) and metal shield over memory blocks to prevent physical tampering.
• Security features include voltage/frequency monitors, anti-tearing counters, escalating attack penalties, and reset locking mechanisms.

Specialized ICS Applications

• Networking and Communications
• Authentication systems requiring secure key management
• Firmware verification and digest validation

Specialized ICS Procurement Notes

Verify the ordering suffix '-T' corresponds to the Tape & Reel packaging configuration as specified in local product fields. Confirm that the specific revision matches the datasheet Atmel-8857A. Ensure the procurement source provides documentation confirming RoHS compliance and the correct TWI address initialization value of 0xC0 upon shipment.

Specialized ICS Selection Notes

Select this component when integrating with Atmel CryptoRF or CryptoMemory tags requiring external host-side cryptographic processing. Ensure the system supports the 2-Wire Interface protocol with appropriate pull-up resistors. Verify that the application environment stays within the -40°C to 85°C industrial temperature range and adheres to the 2.7V–3.6V supply voltage constraints.

Specialized ICS Part Context

This part belongs to the CryptoCompanion™ series by Microchip Technology (formerly Atmel). It serves as a companion chip specifically engineered to handle complex authentication and encryption tasks for CryptoRF and CryptoMemory products, offloading these functions from the main host processor while keeping secrets obscured in nonvolatile memory.

Specialized ICS Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Direct replacements should be evaluated based on compatibility with the CryptoRF/CryptoMemory ecosystem and identical TWI interface timing requirements.

Specialized ICS FAQ

What is the default TWI device address for the AT88SC118 upon shipment?

The Device Address (Dev) field is initialized to 0xC0 upon shipment from the factory.

Can the ManufacturingID be modified after the chip is locked?

No, the 15-byte ManufacturingID is written by Atmel at wafer test and cannot be modified by the customer, regardless of whether the part has been locked.

How does the chip protect against illegal power cycling?

The AT88SC118 includes reset locking functionality and programmable power-up penalties to prevent illegal power cycling and systematic attacks.