ECC204-TFLXAUTHU

Specialized ICS Overview

The Microchip Technology ECC204-TFLXAUTHU is a CryptoAuthentication™ series secure authentication IC designed for disposable and ecosystem control applications. It provides hardware-based key storage supporting ECDSA P-256 signatures, SHA-256, and HMAC operations. The device features field-programmable EEPROM storing one private key, two certificates, one symmetric key, and 64 bytes of user data with over 40-year retention at +55°C. It includes a monotonic counter (max 10,000) and a unique 72-bit serial number. Interfaces include 400 kHz I²C and 100 kbps PWM single-wire serial interface (SWI). Operating voltage ranges from 1.65V to 5.5V with an extended industrial temperature range of -40°C to +105°C.

Specialized ICS Feature Summary

• Hardware-accelerated asymmetric signing using NIST P-256 ECDSA and symmetric HMAC/SHA-256.
• Secure hardware-based key storage with JIL High security rating and FIPS 140-3 compliance mode option.
• Internal high-quality TRNG certified to NIST SP 800-90A/B/C standards.
• Monotonic counter limiting key usage up to 10,000 counts and unique 72-bit serial number.

Specialized ICS Applications

• Ecosystem control through asymmetric authentication and PKI.
• Disposable and accessory authentication with limited use via programmable counters.
• Symmetric authentication utilizing HMAC keys.

Specialized ICS Procurement Notes

Verify the TrustFLEX provisioning status associated with the TFLX suffix. This variant requires specific customer credentials defined in a Secure Exchange Package. Confirm that the ordering entity matches the designated customer in the provisioning system before procurement.

Specialized ICS Selection Notes

Select this component for applications requiring pre-configured secure elements with customer-unique credentials. Choose between I²C or SWI interfaces based on GPIO availability. Ensure host systems support the required cryptographic protocols for verification if used in asymmetric authentication scenarios.

Specialized ICS Part Context

This part belongs to the ECC204 Trust Platform family, specifically the TrustFLEX variant. Unlike standard generic parts, TrustFLEX devices are pre-provisioned with customer-specific credentials generated via the TrustFLEX configurator. They are intended for fixed-function use cases where unique identity is required without full custom configuration.

Specialized ICS Replacement Considerations

Generic ECC204 variants such as ECC204-MAVDA-T may serve as functional replacements if unique provisioning is not required. Verify interface compatibility and memory configuration differences when substituting.