SHA105-TFLXAUTHU

Specialized ICS Overview

The SHA105-TFLXAUTHU is a CryptoAuthentication™ family member providing 128-bit symmetric security for host-side authentication. It features secure hardware-based key storage, including one symmetric secret key and one I/O protection key within field-programmable EEPROM. The device supports CheckMAC validation of client-generated MACs and includes an internal NIST SP 800-90A/B/C certified Random Number Generator (RNG). Electrical specifications include a supply voltage range of 1.65V to 5.5V, a 400kHz Fast-Mode I²C interface, and a nominal sleep current of 130nA. It operates within a temperature range of -40°C to +105°C.

Specialized ICS Feature Summary

• Hardware-based symmetric key storage with CheckMAC validation support
• NIST SP 800-90A/B/C certified internal Random Number Generator (RNG)
• Field-programmable EEPROM with 40-year data retention at +55°C
• Unique 72-bit serial number and monotonic counter (max 10,000)

Specialized ICS Applications

• Accessory and disposable authentication
• Ecosystem control
• Anti-cloning measures

Specialized ICS Procurement Notes

Verify the TrustFLEX provisioning status associated with the TFLX suffix. Confirm that the specific customer credentials required for operation have been generated via the Secure Exchange Package. Ensure the ordering quantity matches the Tape & Reel packaging requirements for the 8-pad UDFN variant.

Specialized ICS Selection Notes

Select this component for host-side symmetric authentication where microcontroller agnosticism is required. The SHA105-TFLXAUTHU is suitable for applications needing pre-configured secure elements with customer-unique credentials. Compare against SHA104-TFLXAUTH if accessory-side implementation is needed instead.

Specialized ICS Part Context

This part belongs to the Microchip TrustFLEX platform, which provides pre-configured and provisioned secure elements with customer-unique credentials. It is designed to simplify development by leveraging the TrustFLEX configurator to generate a Secure Exchange Package for ordering.

Specialized ICS Replacement Considerations

SHA105-TFLXAUTHS serves as the SOIC package equivalent. SHA105-MAHDA/SHA105-SSHDA are standard generic equivalents to the TrustCUSTOM variants.