SHA104-TFLXAUTHU

Overview

The SHA104-TFLXAUTHU 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 I2C interface and is housed in an 8-pad UDFN package.

Feature Summary

• TrustFLEX Provisioning: Pre-configured with customer-unique credentials via Secure Exchange Package.
• Secure Storage: Protected symmetric key storage and 384-byte user EEPROM with 40-year data retention at +55°C.
• Cryptographic Engine: Hardware support for SHA-256 based MAC generation and NIST SP 800-90A/B/C compliant RNG.
• Interface: 400kHz fast-mode I2C communication.

Applications

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

Procurement Notes

Verify that the TrustFLEX provisioning service has been completed for this part number. The device requires a Secure Exchange Package generated through the Microchip Secure Provisioning System to ensure only designated customers can order these pre-provisioned units. Confirm the I2C interface requirement matches the system design.

Selection Notes

Select the SHA104-TFLXAUTHU when unique customer credentials are required for a disposable application using the I2C interface. For SWI interface needs, choose the corresponding SWI variant. If no unique credentials are needed, consider standard generic SHA104 models. Ensure the host system supports the 400kHz I2C speed and 1.65V-5.5V voltage range.

Part Context

This part belongs to the SHA104 Trust Platform family, specifically the TrustFLEX tier. Unlike generic SHA104 devices, this variant is provisioned with specific customer credentials during manufacturing. It is designed to be microcontroller agnostic and serves as a companion device to host-side security elements like the SHA105.

Replacement Considerations

SHA104-TFLXAUTHS (SOIC package equivalent). Generic SHA104-MAHDA/SHA104-SSHDA (if custom provisioning is acceptable instead of TrustFLEX).