SHA104-TFLXAUTHS

Overview

The SHA104-TFLXAUTHS 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 384 bytes of user EEPROM with 40-year data retention at +55°C and a monotonic counter limited to 10,000 uses. It operates on a 1.65V to 5.5V supply with 130nA sleep current. This specific variant utilizes the TrustFLEX provisioning service and communicates via a 400kHz I2C interface in an 8-lead SOIC package.

Feature Summary

• TrustFLEX Provisioning: Pre-configured with customer-unique credentials via Secure Exchange Package
• Secure Storage: Protected symmetric key memory and 384-byte user-accessible EEPROM
• Cryptographic Engine: Hardware-accelerated SHA-256 and NIST SP 800-90A/B/C compliant RNG
• Interface: 400kHz Fast-mode I2C communication

Applications

• Accessory authentication
• Disposable component tracking
• Ecosystem control and anti-cloning

Procurement Notes

This part requires ordering through the Microchip Secure Provisioning System using a generated Secure Exchange Package. Only the designated customer can order these devices. Verify that the TrustFLEX configuration matches the application requirements before finalizing the order, as the device is pre-provisioned with unique credentials.

Selection Notes

Select the SHA104-TFLXAUTHS when a fixed-function solution with custom credentials is needed without full customization. Choose this over the standard SHA104 if unique provisioning is required but full TrustCUSTOM flexibility is unnecessary. Ensure the host system supports I2C communication and has access to the necessary challenge-response pairs or root keys for the paired host device.

Part Context

The SHA104-TFLXAUTHS belongs to the SHA104 Trust Platform family. The 'TFLX' suffix indicates TrustFLEX provisioning, while 'AUTHS' denotes the 8-pin SOIC package with I2C interface. It is designed to work alongside host-side devices like the SHA105 for secure pairing and authentication protocols.

Replacement Considerations

Standard SHA104 variants (e.g., SHA104-SSHDA) are functionally identical regarding hardware but lack the pre-provisioned TrustFLEX credentials. Direct substitution requires re-provisioning or adjusting the host firmware to accommodate unprovisioned devices.