ECC204-SSVCZ-T

Specialized ICS Overview

The Microchip Technology ECC204-SSVCZ-T is a CryptoAuthentication™ series cryptographic device designed for disposable and ecosystem control applications. It provides secure hardware-based key storage, supporting one ECC private key, two certificates, one symmetric key, and 64 bytes of user memory with over 40-year data retention at +55°C. The IC features hardware acceleration for ECDSA (FIPS186-4 P-256), SHA-256, and HMAC. It offers dual interface options: a 400 kHz I²C interface or a 100 kbps PWM single-wire serial interface (SWI) with parasitic power support. Operating within an extended industrial temperature range of -40°C to +105°C, it includes a monotonic counter (max 10,000 counts) and a unique 72-bit serial number.

Specialized ICS Feature Summary

• Hardware-accelerated ECDSA P-256 signature generation and verification with internal TRNG compliant with NIST SP 800-90A/B/C.
• Secure field-programmable EEPROM storing one ECC private key, two certificates, one symmetric key, and 64 bytes of user data.
• Dual interface configuration: 400 kHz Fast Mode I²C or 100 kbps PWM Single-Wire Interface (SWI) with parasitic power capability.
• High-level physical security resistance evaluated by Joint Interpretation Laboratory (JIL) against environmental, non-invasive, and invasive attacks.

Specialized ICS Applications

• Ecosystem control through asymmetric authentication and Public Key Infrastructure (PKI).
• Disposable product and accessory authentication with usage limiting via the monotonic counter.
• Anti-counterfeiting validation for OEM components and systems.
• Symmetric authentication using HMAC keys for secure system access.

Specialized ICS Procurement Notes

Verify that the ordering suffix 'SSVCZ' corresponds to the specific package, temperature grade, and tape & reel packaging configuration required for the design. Confirm compatibility with the host microcontroller's voltage levels and interface protocol (I²C vs. SWI). Ensure the procurement channel supports the necessary Trust Platform provisioning services if pre-configured credentials are required for the application.

Specialized ICS Selection Notes

Select this component when a compact, low-power solution is needed for authenticating accessories or consumables. Choose the I²C interface for standard multi-device bus architectures or the SWI interface to minimize GPIO usage and pin count, particularly in parasitic power modes. Ensure the design accommodates the 8-SOIC package dimensions and thermal requirements, as well as the need for external pull-up resistors on the communication lines.

Specialized ICS Part Context

The ECC204-SSVCZ-T belongs to the Microchip CryptoAuthentication™ family, which integrates hardware-based key storage with cryptographic accelerators. This specific part variant utilizes the 8-SOIC package format. It serves as a companion security device for microcontrollers, enabling robust authentication protocols without exposing private keys to the main processor, thereby mitigating software-based attack vectors common in standard MCU implementations.

Specialized ICS Replacement Considerations

Direct functional replacements within the same family include other ECC204 variants such as ECC204-TFLXAUTHS or ECC204-TCSMS, which offer different provisioning flows but share identical electrical and cryptographic specifications. Verify that any substitute maintains the 8-SOIC package footprint and supports the required operating temperature range of -40°C to +105°C.