SHA104-TFLXAUTHS-CZ

Overview

The SHA104-TFLXAUTHS-CZ is a Microchip CryptoAuthentication™ member providing 128-bit symmetric security for disposable and ecosystem control applications. It features hardware-based key storage, MAC generation support, and an internal NIST-certified RNG. The device includes field-programmable EEPROM with 384 bytes of user memory and a monotonic counter (max 10,000). It operates on a 1.65V to 5.5V supply with 130nA sleep current. This specific variant utilizes the TrustFLEX provisioning service and is housed in an 8-lead SOIC package.

Feature Summary

• TrustFLEX Provisioning: Pre-configured secure element with customer-unique credentials via Secure Exchange Package.
• Hardware Security: Protected symmetric key storage, SHA-256 MAC generation, and NIST SP 800-90A/B/C compliant RNG.
• Memory & Counters: 384-byte user EEPROM, single symmetric secret key slot, and monotonic counter up to 10,000 uses.
• Interface Options: Supports 400kHz I2C or 125kbps PWM Single-Wire Interface (SWI) with parasitic power capability.

Applications

• Accessory and disposable component authentication
• Ecosystem control and anti-counterfeiting validation
• Challenge-response and shared key authentication systems

Procurement Notes

Verify that the TrustFLEX ordering process is completed through the designated Secure Exchange Package. Only the customer specified in the package can order these devices. Confirm the 8-lead SOIC package type matches the design requirements. Ensure compatibility with the host-side SHA105 or other CryptoAuthentication devices for full system functionality.

Selection Notes

Select this variant when unique customer credentials are required for the SHA104 within the TrustFLEX framework. The 'S' suffix denotes the 8-lead SOIC package. Consider the SWI interface if minimizing GPIO pins is critical, as it supports parasitic power modes. Verify that the host system supports the necessary cryptographic commands for MAC generation and challenge-response protocols.

Part Context

This part belongs to the SHA104 Trust Platform family, specifically the TrustFLEX tier. Unlike standard generic parts, TrustFLEX devices are provisioned with customer-specific data during manufacturing. The SHA104 serves as a companion device to microcontrollers, focusing on symmetric key security rather than asymmetric operations found in ECC series parts.

Replacement Considerations

SHA104-TCSMS is the equivalent TrustCUSTOM version in the same 8-lead SOIC package. Generic SHA104-SSHDA may serve as a functional hardware replacement but lacks the pre-provisioned TrustFLEX credentials. Ensure any substitute supports the required I2C or SWI interface and voltage range.